java毕业考试试题

java毕业考试试题
java毕业考试试题

700

SQL

1. Given a SELECT statement that has a GROUP BY clause.

The HA VING clause uses the same syntax as which other clause?

A. WHERE

B. UNION

C. SUBQUERY

D. ORDER BY

2. Which of the following statements will create an index and prevent table T1 from containing two or more rows with the same values for column C1?

A. CREATE UNIQUE INDEX ix1 ON t1 (c1)

B. CREATE DISTINCT INDEX ix1 ON t1 (c1)

C. CREATE UNIQUE INDEX ix1 ON t1 (c1,c2)

D. CREATE DISTINCT INDEX ix1 ON t1 (c1,c2)

3. Which of the following is the result of the following SQL statement:

CREATE UNIQUE INDEX empno_ind ON employee (empno)

A. Every value for EMPNO must be unique.

B. UPDATE statements on EMPNO will be rolled back.

C. INSERT statements on EMPNO will always be faster.

D. INSERT statements on the EMPNO table will result in clustered data.

64.Which of the following is the outcome of the following SQL statements?

CREATE TABLE employee (empno INT, empname CHAR (30))

CREATE UNIQUE INDEX empno_ind ON employee (empno)

A.Every value for EMPNO will be different.

B. Multiple NULL values are allowed in the EMPNO column.

C. An additional unique index cannot be created on the EMPLOYEE table.

D. INSERT statements on the EMPLOYEE table will result in clustered data.

4. Which of the following statements eliminates all but one of each set of repeated rows in the final result table?

A. SELECT UNIQUE * FROM t1

B. SELECT DISTINCT * FROM t1

C. SELECT * FROM DISTINCT T1

D. SELECT UNIQUE (*) FROM t1

E. SELECT DISTINCT (*) FROM t1

5. What is the difference between a unique index and a primary key?

A. They are different terms for the same concept.

B. Unique indexes can be defined over multiple columns.Primary keys must have only one column.

C. Unique indexes can be defined in ascending or descending order. Primary keys must be ascending.

D. Unique indexes can be defined over a column or columns that allow nulls. Primary keys cannot contain

nulls.

6. Which of the following can be accomplished with a single UPDATE statement?

A. Updating multiple tables

B. Updating a view consisting of joined tables

C. Updating multiple tables based on a WHERE clause

D. Updating a table based on a sub-select using joined tables

7. Which of the following tasks can be performed using the ALTER TABLESPACE statement?

A. ASSING a bufferpool

B. Change the table space name

C. Change the type of the table space

D. Change the page size of the table space

8.Which two of the following can be done using the ALTER TABLE statement?

A. Add a trigger.

B. Define an index.

C. Drop a table alias.

D. Add an INTEGER column.

E. Define a unique constraint.

9.Which two of the following can be done using the ALTER TABLE statement?

A. Define a trigger.

B. Define a primary key.

C. Add a check constraint.

D. Add a non-unique index.

E. Change a column's name.

10. Which of the following SQL statements can remove all rows from a table named COUNTRY?

A. DELETE country

B. DELETE FROM country

C. DELETE * FROM country

D. DELETE ALL FROM country

11. Which of the following is the result of the following SQL statement:

ALTER TABLE talbw1 ADD col2 INT WITH DEFAULT

A. The statement fails with a negative SQL code

B. The statement fails because no default value is specified

C. A new column called COL2 is added to TABLE1 and populated with zeros

D. A new column called COL2 is added to TABLE1 and populated with nulls

E. A new column called COL2, which cannot contains nulls, is added to TABLE1

65.Given the SQL statement:

ALTER TABLE table1 ADD col2 INT WITH DEFAULT

Which of the following is the result of the statement?

A. The statement fails because no default value is specified.

B. A new column called COL2 is added to TABLE1 which would have a null value if selected.

C. A new column called COL2 is added to TABLE1 which would have a value of zero if selected.

D. A new column called COL2 is added to TABLE1 which would require the default value to be set before

working with the table.

12. Which of the following DDL statements creates a table where employee IDs are unique?

A. CREATE TABLE t1 (employid INTEGER)

B. CREATE TABLE t1 (employid INTEGER GENERATED BY DEFAULT AS IDENTITY)

C. CREATE TABLE t1 (employid INTEGER NOT NULL)

D. CREATE TABLE t1 (employid INTEGER NOT NULL PRIMARY KEY)

13. Given the table T1, created by:

CREATE TABLE t1

(id INTEGER GENERATED BY DEFAULT AS IDENTITY,

c1 CHAR(3)

)

The following SQL statements are issued:

INSERT INTO t1 V ALUES (1, ‘ABC’)

INSERT INTO t1 V ALUES (5, ‘DEF’)

Which of the following values are inserted into the ID column by the following statement? INSERT INTO t1(c1) V ALUES (‘XYZ’)?

A. 0

B. 1

C. 2

D. 5

E. 6

14. Given the table T1 created by:

CREATE TABLE t1

(id INTEGER NOT NULL GENERATED ALWAYS AS IDENTITY,

c1 CHAR(10) NOT NULL,

c2 CHAR(10)

)

Which of the following INSERT statement will succeed?

A. INSERT INTO t1 V ALUES (1, ‘abc’, NULL)

B. INSERT INTO t1 V ALUES (1, NULL, ‘def’)

C. INSERT INTO t1(c1, c2) V ALUES (‘abc’, NULL)

D. INSERT INTO t1(c1, c2) V ALUES (NULL, ‘def’)

15. Given the following statement:

CREATE TABLE t1 (c1 CHAR(4) NOT NULL)

Which of the following can be inserted into this table?

A. 4

B. NULL

C. 'abc'

D. 'abcde'

16. CREAT DISTINCT TYPE kph AS INTEGER WITH COMPARISONS

CREAT DISTINCT TYPE mph AS INTEGER WITH COMPARISONS

CREAT TABLE speed_limits

(route_num SMALLINT,

canada_sl KPH NOT NULL,

us_sl MPH NOT NULL)

Which of the following is a valid quary?

A. SELECT route_num FROM speed_limits WHERE canada_sl > 80

B. SELECT route_num FROM speed_limits WHERE canada_sl > kph

C. SELECT route_num FROM speed_limits WHERE canada_sl > us_sl

D. SELECT route_num FROM speed_limits WHERE canada_sl > kph(80)

18. Given the statement:

CREATE TABLE t1

(c1 INTEGER NOT NULL,

c2 INTEGER

PRIMARY KEY (c1)

FOREIGN KEY (c2) REFERENCES t2)

How many non-unique indexes are defined for table t1?

A. 0

B.1

C. 2

D. 3

19.Given the following:

CREATE TABLE tab1 (c1 char(3) WITH DEFAULT NULL, c2 INTEGER);

INSERT INTO tab1(c2) VALUES (345);

What will be the result of the following statement if issued from the Command Line Processor?

SELECT * FROM tab1;

A. C1 C2

--- -----------

0 record(s) selected.

B. C1 C2

--- -----------

123 345

1 record(s) selected.

C. C1 C2

--- -----------

345

1 record(s) selected.

D.C1 C2

--- -----------

- 345

1 record(s) selected.

20.Given the following information:

CREATE TABLE tab1 (c1 CHAR(4), c2 INTEGER)

INSERT INTO tab1 VALUES ('123',345)

UPDATE tab1 SET (c1, c2) = (NULL,0)

What will be the result of the following statement if issued in the Command Line Processor?

SELECT * FROM tab1;

A.C1 C2

---- -----------

- 0

1 record(s) selected.

B. C1 C2

---- -----------

123 345

1 record(s) selected.

C. C1 C2

---- -----------

NULL 0

1 record(s) selected.

D. C1 C2

---- -----------

123 0

1 record(s) selected.}

21. Given the following statements:

Create table mytab

{

Col1 int not null primary key,

Col2 char(64),

Col3 char(32),

Col4 int not null,

Constraint c4 unique (Col4, Col1)

}

How many indexes will be created by the following statement?

A. 0

B. 1

C. 2

D. 3

E. 4

22. Given the following table structure:

table1

emp_num INT NOT NULL PRIMARY KEY

emp_frame CHAR(30) NOT NULL

emp_lname CHAR(30) NOT NULL

emp_addr CHAR(60) NOT NULL

emp_pin CHAR(10) NOT NULL

Which of the following columns can be referenced by a foreign key clause from anther table?

A. emp_num

B.emp_pin

C. emp_addr

D. emp_frame

E. emp_lname

23. Given the tables:

TABLEA TABLEB

empid name empid weeknumber paycheck

1 JOE 1 1 1000.00

2 BOB 1 2 1000.00

2 1 2000.00

TABLEB was defined as follows:

CREATE TABLE tableb (empid CHAR(3), weeknumber CHAR(3), paycheck DECIMAL(6, 2), CONSTRAINT const1 FROEIGN KEY(empid)

REFERENCES tablea (empid) ON DELETE SET NULL)

How many rows would be deleted from tableb if the following command is issued:

DELETE FROM tablea WHERE empid=‘2’?

A. 0

B. 1

C. 2

D. 3

24. Given the following SQL statements:

CREATE TABLE tab1 (col1 INT)

CREATE TABLE tab2 (col1 INT)

INSERT INTO tab1 V ALUES (NULL), (1)

INSERT INTO tab2 V ALUES (NULL), (1)

SELECT COUNT(*) FROM tab1

WHERE col1 IN

(SELECT col1 FROM tab2)

Which of the following is the result of the SELECT COUNT(*) statement?

A. 1

B. 2

C. 3

D. 4

E. 0

25. Given the following DDL statement:

CREATE TABLE newtab1 LIKE tab1

Which of the following would occur as a result of the statement execution?

A. NEWTAB1 has same triggers as TAB1

B. NEWTAB1 is populated with TAB1 data

C. NEWTAB1 has the same primary key as TAB1

D. NEWTAB1 columns have same attributes as TAB1

66.Given the following DDL statement:

CREATE TABLE newtab1 LIKE tab1

Which of the following would occur as a result of the statement execution?

A.NEWTAB1 would have the same column names and attributes as TAB1

B. NEWTAB1 would have the same column names, attributes, and data as TAB1

C. NEWTAB1 would have the same column names, attributes, indexes, and constraints as TAB1

D. NEWTAB1 would have the same column names, attributes, and referential integrity as TAB1

60.Given the following statements:

CREATE TABLE t1 (col1 INT NOT NULL);

ALTER TABLE t1 ADD CONSTRAINT t1_ck CHECK (col1 in (1,2,3));

INSERT INTO t1 VALUES (3);

CREATE TABLE t2 LIKE t1;

DROP TABLE t1;

Which of the following is the result of these statements?

A. Both tables are dropped.

B. T2 is an empty table with the check constraint.

C. T2 is an empty table without the check constraint.

D. T2 contains 1 row and is defined with the check constraint.

E. T2 contains 1 row and is defined without the check constraint.

26. Given the table definition:

CREATE TABLE student (name CHAR(30), age INTEGER)

To list the names of the 10 youngest students, which of the following index definition statements on the student table may improve the query performance?

A. CREATE INDEX youngest ON student (age, name)

B. CREATE INDEX youngest ON student (name , age)

C. CREATE INDEX youngest ON student (name , age DESC)

D. CREATE INDEX youngest ON student (name , age DESC) INCLUDE (age)

28. Given table T1 with 100 rows, which of the following queries will retrieve 10 rows from table T1?

A. SELECT * FROM t1 MAXIMUM 10 ROWS

B. SELECT * FROM t1 READ 10 ROWS ONLY

C. SELECT * FROM t1 OPTIMIZE FOR 10 ROWS

D. SELECT * FROM t1 FETCH FIRST 10 ROWS ONLY

70.Given table T1 with 100 rows, which of the following queries will retrieve 10 rows from table T1?

A. SELECT * FROM t1 MAXIMUM 10 ROWS

B. SELECT * FROM t1 TOP 10 ROWS ONLY

C. SELECT * FROM t1 OPTIMIZE FOR 10 ROWS

D. SELECT * FROM t1 FETCH FIRST 10 ROWS ONLY

83.Given table T1 with 100 rows, which of the following queries will retrieve 10 rows from table T1?

A. SELECT * FROM t1 MAXIMUM 10 ROWS

B. SELECT * FROM t1 TOP 10 ROWS ONLY

C. SELECT * FROM t1 OPTIMIZE FOR 10 ROWS

D.SELECT * FROM t1 FETCH FIRST 10 ROWS ONLY

29. With tables defined as:

Table1

col INT

col2 CHAR(30)

Table2

col INT

col2 CHAR(30)

Which of the following statements will insert all the rows in TABLE2 into TABLE1?

A. INSERT INTO table1 SELECT col1, col2 FROM table2

B. INSERT INTO table1 AS SELECT col1, col2 FROM table2

C. INSERT INTO table1 V ALUES(table2.col1, table2.col2)

D. INSERT INTO table1 V ALUES (SELECT col1, col2 FROM table2)

E. INSERT INTO table1(col1, col2) V ALUES(SELECT col1, col2 FROM table2)

93.Given tables that are defined in the following way:

Table1

col1 INT

col2 CHAR(30)

Table2

col1 INT

col2 CHAR(30)

Which of the following statements will insert all the rows in TABLE2 into TABLE1?

A. INSERT INTO table1 (table2.col1, table2.col2)

B. INSERT INTO table1 SELECT col1, col2 FROM table2

C. INSERT INTO table1 VALUES (SELECT col1, col2 FROM table2)

D. INSERT INTO table1 (col1,col2) VALUES (SELECT col1,col2 FROM table2

30. Given the table definition:

DEFIN1:

id SMALLINT NOT NULL

name V ARCHAR(30)

hired DATE

DEFIN2:

deptid SMALLINT NOT NULL

name V ARCHAR(30)

started DATE

Which of the following statements will insert successfully into table DEFIN1?

A. INSERT INTO defin1 (id) V ALUES (1)

B. INSERT INTO defin1 (name) V ALUES (‘Florence’)

C. INSERT INTO defin1 (id, hired) AS SELECT DISTINCT 1, CURRENT DATE FROM defin2

D. INSERT INTO defin1 (name, hired) SELECT DISTINCT ‘Florence’, CURRENT DATE FROM defin2

92.Given the table definitions:

DEFIN1:

id SMALLINT NOT NULL

name VARCHAR(30)

hired DATE

DEFIN2:

deptid SMALLINT NOT NULL

name VARCHAR(30)

started DATE

Assuming that neither table is empty, which of the following statements will insert data successfully into table DEFIN1?

A. INSERT INTO defin1 (id) VALUES (1)

B. INSERT INTO defin1 (name) VALUES ('Florence')

C. INSERT INTO defin1 (id, hired) AS SELECT DISTINCT 1, CURRENT DATE FROM defin2

D. INSERT INTO defin1 (name, hired) SELECT DISTINCT 'Florence', CURRENT DATE FROM defin2

73.Given the table definitions:

DEFIN1:

id SMALLINT NOT NULL

name VARCHAR(30)

hired DATE

DEFIN2:

deptid SMALLINT NOT NULL

name VARCHAR(30)

started DATE

Assuming that neither table is empty, which of the following statements will insert data successfully into table DEFIN1?

A.INSERT INTO defin1 (id) VALUES (1)

B. INSERT INTO defin1 (name) VALUES ('Florence')

C. INSERT INTO defin1 (id, hired) AS SELECT DISTINCT 1, CURRENT DATE FROM defin2

D. INSERT INTO defin1 (name, hired) SELECT DISTINCT 'Florence', CURRENT DATE FROM defin2

31. Given table EMPLOYEE with columns EMPNO and SALARY and table JOB with columns ID and TITLE, what is the effect of the statement:

UPDATE employee SET salary=salary * 1.15

WHERE salary<15000 OR EXISTS(SELECT 1 FROM job WHERE job.id=employee.empno AND job.title=‘Mgr’)

A. Only manager that make less than 15,000 are given salary increases

B. Only non-manager that make less than 15,000 are given salary increases

C. Employees that make less than 15,000 but no managers are given salary increases

D. Employees that make less than 15,000 and all managers are given salary increases

90.Given table EMPLOYEE with columns EMPNO and SALARY, and table JOB with columns ID and TITLE, what is the effect of the following statement?

UPDATE employee SET salary = salary * 1.15

WHERE salary < 15000 OR

EXISTS (SELECT 1 FROM job WHERE job.id = employee.empno AND job.title =

'MANAGER')

A.Employees who make less than 15,000 and all managers are given salary increases.

B. Only employees who are managers that make less than 15,000 are given salary increases.

C. Employees who are not managers and who make less than 15,000 are given salary increases.

D. Only employees who are not managers or make less than 15,000 are given salary increases.

32. Given the following:

TAB1 TAB2

C1 C2 CX CY

––––

A 11 A 21

B 12

C 22

C 13

D 23

The following results are desired:

C1 C2 CX CY

––––

A 11 A 21

C 13 C 22

–– D 23

Which of the following joins will yield the desired results?

A. SELECT * FORM tab1, tab2 WHERE c1=cx

B. SELECT * FORM tab1INNER JOIN tab2 ON c1=cx

C. SELECT * FORM tab1FULL OUTER JOIN tab2 ON c1=cx

D. SELECT * FORM tab1 RIGHT OUTER JOIN tab2 ON c1=cx

68.Given the following two tables:

TAB1 TAB2

C1 C2 CX CY

--- ---- ----- ----

A 11 A 21

B 12

C 22

C 13

D 23

The following results are desired:

C1 C2 CX CY

---- ---- ---- ----

A 11 A 21

C 13 C 22

- - D 23

Which of the following joins will yield the desired results?

A. SELECT * FROM tab1 INNER JOIN tab2 ON c1=cx

B. SELECT * FROM tab2 FULL OUTER JOIN tab1 ON c1=cx

C. SELECT * FROM tab2 RIGHT OUTER JOIN tab1 ON c1=cx

D.SELECT * FROM tab1 RIGHT OUTER JOIN tab2 ON c1=cx

33. Given the following:

TAB1 TAB2

C1 C2 CX CY

––––

A 11 A 21

B 12

C 22

C 13

D 23

The following results are desired:

C1 C2 CX CY

––––

A 11 A 21

B 12 ––

C 13 C 22

Which of the following joins will yield the desired results?

A. SELECT * FORM tab1, tab2 WHERE c1=cx

B. SELECT * FORM tab1INNER JOIN tab2 ON c1=cx

C. SELECT * FORM tab1FULL OUTER JOIN tab2 ON c1=cx

D. SELECT * FORM tab1 LEFT OUTER JOIN tab2 ON c1=cx

34. Given the following UPDATE statement:

UPDATE address2 SET housenumber_buildingname=

(SELECT buildingname FROM address1

WHERE address2.id=address1.id)

WHERE HOUSENUMBER_BUILDINGNAME IS NULL

Which of the following describes the result of the statement?

A. The statement will succeed.

B. The statement will fail because a subquery cannot exist in an UPDATE statement.

C. The statement will succeed only if ADDRESS1.ID and ADDRESS2.ID are defined as primary keys.

D. The statement will succeed only if the data retrieved from the subquery does not have duplicate values for

ASSRESS1.ID.

69.Given the following UPDATE statement:

UPDATE address2 SET house_building=

(SELECT building FROM address1

WHERE address2.id = address1.id)

WHERE house_building IS NULL

Which of the following describes the result of the statement?

A. The statement will succeed.

B. The statement will fail because a subquery cannot exist in an UPDATE statement.

C. The statement will succeed only if ADDRESS1.ID and ADDRESS2.ID are defined as primary keys.

D.The statement will succeed if the data retrieved from the subquery does not have duplicate values for

ADDRESS1.ID.

35. Given the following DDL statements:

CREATE TABLE t1 (a INT, b INT, c INT)

CREATE VIEW v1 AS SELECT a, b, c FROM t1

WHERE a>250 WITH CHECK OPTION

Which of the following INSERT statements will fail?

A. INSERT INTO t1 V ALUES (200, 2, 3)

B. INSERT INTO v1 V ALUES (200, 2, 3)

C. INSERT INTO t1 V ALUES (300, 2, 3)

D. INSERT INTO v1 V ALUES (300, 2, 3)

36. Given the following statements:

CREATE TABLE t4

(c1 INTEGER NOT NULL,

c2 INTEGER,

c3 DECIMAL(7,2) NOT NULL,

c4 CHAR(20) NOT NULL);

CREATE UNIQUE INDEX i4 ON t4(c1,c3);

ALTER TABLE t4 ADD PRIMARY KEY (c1,c3);

Which of the following statements is TRUE?

A. The ALTER TABLE statement will fail.

B. The primary key will use the I4 unique index.

C. A primary index will need to be created on the composite key (C1,C3).

D. An additional unique index will automatically be created on the composite key (C1,C3).

37. The table STOCK has the following column definitions:

type CHAR(1)

status CHAR(1)

quantity INTEGER

price DEC (7,2)

items are indicated to be out of stock by setting STATUS to NULL and QUANTITY and PRICE to zero. Which of the following statements updates the STOCK table to indicate that all the items except for those with TYPE of "S" are temporarily out of stock?

A. UPDATE stock SET status='NULL', quantity=0, price=0 WHERE type <> 'S'

B. UPDATE stock SET (status, quantity, price) = (NULL, 0, 0) WHERE type <> 'S'

C. UPDATE stock SET (status, quantity, price) = ('NULL', 0, 0) WHERE type <>'S'

D. UPDATE stock SET status = NULL, SET quantity=0, SET price = 0 WHERE type <>'S'

38. Given the two following tables:

NAMES

Name Number

Wayne Gretzky 99

Jaromir Jagr 68

Bobby Orr 4

Bobby Hull 23

Brett Hull 16

Mario Lemieux 66

Steve Yzerman 19

Claude Lemieux 19

Mark Messier 13

Mats Sundin 11

POINTS

Name Points

Wayne Gretzky 244

Jaromir Jagr 168

Bobby Orr 129

Bobby Hull 93

Brett Hull 121

Mario Lemieux 189

Joe Sakic 94

Which of the following statements will display the player’s names, numbers and points for players with an entry in both tables?

A. SELECT https://www.360docs.net/doc/cb15117661.html,, names.number, points.points FROM names INNER JOIN points ON

https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

B. SELECT https://www.360docs.net/doc/cb15117661.html,, names.number, points.points FROM names FULL OUTER JOIN points ON

https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

C. SELECT https://www.360docs.net/doc/cb15117661.html,, names.number, points.points FROM names LEFT OUTER JOIN points ON

https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

D. SELECT https://www.360docs.net/doc/cb15117661.html,, names.number, points.points FROM names RIGHT OUTER JOIN points ON

https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

85.Given the two following tables:

Tablename: NAMES

Name Number

Wayne Gretzky 99

Jaromir Jagr 68

Bobby Orr 4

Bobby Hull 23

Brett Hull 16

Mario Lemieux 66

Steve Yzerman 19

Claude Lemieux 19

Mark Messier 11

Mats Sundin 13

Tablename:POINTS

Name Points

Wayne Gretzky 244

Jaromir Jagr 168

Bobby Orr 129

Bobby Hull 93

Brett Hull 121

Mario Lemieux 189

Joe Sakic 94

Which of the following statements will display the player's name, number and points for all players with an entry in both tables?

A.SELECT https://www.360docs.net/doc/cb15117661.html,, names.number, points.points FROM names INNER

JOIN points ON https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

B. SELECT https://www.360docs.net/doc/cb15117661.html,, names.number, points.points FROM names FULL

OUTER JOIN points ON https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

C. SELECT https://www.360docs.net/doc/cb15117661.html,, names.number, points.points FROM names LEFT

OUTER JOIN points ON https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

D. SELECT https://www.360docs.net/doc/cb15117661.html,, names.number, points.points FROM names RIGHT

OUTER JOIN points ON https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

86.Given the two following tables:

POINTS

Name Points

Wayne Gretzky 244

Jaromir Jagr 168

Bobby Orr 129

Bobby Hull 93

Brett Hull 121

Mario Lemieux 189

PIM

Name PIM

Mats Sundin 14

Jaromir Jagr 18

Bobby Orr 12

Mark Messier 32

Brett Hull 66

Mario Lemieux 23

Joe Sakic 94

Which of the following statements will display the name, points and PIM for players in either table?

A. SELECT https://www.360docs.net/doc/cb15117661.html,, points.points, https://www.360docs.net/doc/cb15117661.html,, pim.pim FROM points

INNER JOIN pim ON https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

B.SELECT https://www.360docs.net/doc/cb15117661.html,, points.points, https://www.360docs.net/doc/cb15117661.html,, pim.pim FROM points FULL

OUTER JOIN pim ON https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

C. SELECT https://www.360docs.net/doc/cb15117661.html,, points.points, https://www.360docs.net/doc/cb15117661.html,, pim.pim FROM points LEFT

OUTER JOIN pim ON https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

D. SELECT https://www.360docs.net/doc/cb15117661.html,, points.points, https://www.360docs.net/doc/cb15117661.html,, pim.pim FROM points

RIGHT OUTER JOIN pim ON https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

39. Given the following tables:

NAMES

Name Number

Wayne Gretzky 99

Jaromir Jagr 68

Bobby Orr 4

Bobby Hull 23

Brett Hull 16

Mario Lemieux 66

Steve Yzerman 19

Claude Lemieux 19

Mark Messier 13

Mats Sundin 11

POINTS

Name Points

Wayne Gretzky 244

Jaromir Jagr 168

Bobby Orr 129

Bobby Hull 93

Brett Hull 121

Mario Lemieux 189

PIM

Name PIM

Mats Sundin 14

Jaromir Jagr 18

Bobby Orr 12

Mark Messier 32

Brett Hull 66

Mario Lemieux 23

Joe Sakic 94

Which of the following statements will display the name, number, points and PIM for players with an entry in all three tables?

A. SELECT https://www.360docs.net/doc/cb15117661.html,, names.number, points.points, pim.pim FROM names INNER JOIN points ON

https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html, INNER JOIN pim ON https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

B. SELECT https://www.360docs.net/doc/cb15117661.html,, names.number, points.points, pim.pim FROM names OUTER JOIN points ON

https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html, OUTER JOIN pim ON https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

C. SELECT https://www.360docs.net/doc/cb15117661.html,, names.number, points.points, pim.pim FROM names LEFT OUTER JOIN points

ON https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html, LEFT OUTER JOIN pim ON https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

D. SELECT https://www.360docs.net/doc/cb15117661.html,, names.number, points.points, pim.pim FROM names RIGHT OUTER JOIN points

ON https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html, RIGHT OUTER JOIN pim ON https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

40. Given the two following tables:

POINTS

Name Points

Wayne Gretzky 244

Jaromir Jagr 168

Bobby Orr 129

Bobby Hull 93

Brett Hull 121

Mario Lemieux 189

PIM

Name PIM

Mats Sundin 14

Jaromir Jagr 18

Bobby Orr 12

Mark Messier 32

Brett Hull 66

Mario Lemieux 23

Joe Sakic 94

Which of the following statements will display the player’s names, points and PIM for all players?

A. SELECT https://www.360docs.net/doc/cb15117661.html,, points.points, https://www.360docs.net/doc/cb15117661.html,, pim.pim FROM points INNER JOIN pim ON

https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

B. SELECT https://www.360docs.net/doc/cb15117661.html,, points.points, https://www.360docs.net/doc/cb15117661.html,, pim.pim FROM points FULL OUTER JOIN pim ON

https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

C. SELECT https://www.360docs.net/doc/cb15117661.html,, points.points, https://www.360docs.net/doc/cb15117661.html,, pim.pim FROM points LEFT OUTER JOIN pim ON

https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

D. SELECT https://www.360docs.net/doc/cb15117661.html,, points.points, https://www.360docs.net/doc/cb15117661.html,, pim.pim FROM points RIGHT OUTER JOIN pim ON

https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

71.Given the two following tables:

POINTS

Name Points

Wayne Gretzky 244

Jaromir Jagr 168

Bobby Orr 129

Bobby Hull 93

Brett Hull 121

Mario Lemieux 189

PIM

Name PIM

Mats Sundin 14

Jaromir Jagr 18

Bobby Orr 12

Mark Messier 32

Brett Hull 66

Mario Lemieux 23

Joe Sakic 94

Which of the following statements will display the name, points and PIM for players in either table?

A. SELECT https://www.360docs.net/doc/cb15117661.html,, points.points, https://www.360docs.net/doc/cb15117661.html,, pim.pim FROM points INNER

JOIN pim ON https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

B. SELECT https://www.360docs.net/doc/cb15117661.html,, points.points, https://www.360docs.net/doc/cb15117661.html,, pim.pim FROM points FULL

OUTER JOIN pim ON https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

C. SELECT https://www.360docs.net/doc/cb15117661.html,, points.points, https://www.360docs.net/doc/cb15117661.html,, pim.pim FROM points LEFT

OUTER JOIN pim ON https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

D. SELECT https://www.360docs.net/doc/cb15117661.html,, points.points, https://www.360docs.net/doc/cb15117661.html,, pim.pim FROM points RIGHT

OUTER JOIN pim ON https://www.360docs.net/doc/cb15117661.html,=https://www.360docs.net/doc/cb15117661.html,

41. Given the following table definition:

STAFF

id INTEGER

name CHAR(20)

dept INTEGER

job CHAR(20)

years INTEGER

salary DECIMAL(10, 2)

comm DECIMAL(10, 2)

Which of the following SQL statements will return the total number of employees in each department and the corresponding department id under the following conditions:

Only return departments with at last one employee receiving a commission greater than 5000.

The result should be sorted by the department count from most to least.

A. SELECT dept, COUNT(id) FROM staff WHERE comm>5000 GROUP BY dept ORDER BY 2 DESC

B. SELECT dept, COUNT(*) FROM staff GROUP BY dept HA VING MAX(comm)>5000 ORDER

BY 2 DESC

C. SELECT dept, COUNT(*) FROM staff WHERE comm>5000 GROUP BY dept, comm ORDER BY 2

DESC

D. SELECT dept, comm COUNT(id) FROM staff WHERE comm>5000 GROUP BY dept, comm ORDER

BY 3 DESC

72.Given the following table definition:

STAFF

id INTEGER

name CHAR(20)

dept INTEGER

job CHAR(20)

years INTEGER

salary DECIMAL(10,2)

comm DECIMAL(10,2)

Which of the following SQL statements will return a result set that satisfies these conditions: ? Displays the total number of employees in each department

? Displays the corresponding department ID for each department

? Includes only departments with at least one employee receiving a commission (comm) greater

than 5000

? Sorted by the department employee count from greatest to least

A. SELECT dept, COUNT(*) FROM staff GROUP BY dept HAVING comm > 5000 ORDER BY 2 DESC

B. SELECT dept, COUNT(*) FROM staff WHERE comm > 5000 GROUP BY dept, comm ORDER BY 2

DESC

C. SELECT dept, COUNT(*) FROM staffF GROUP BY dept HAVING MAX(comm) > 5000 ORDER BY

2 DESC

D. SELECT dept, comm, COUNT(id) FROM staff WHERE comm > 5000 GROUP BY dept, comm

ORDER BY 3 DESC

89.Given the following table definition:

STAFF

id INTEGER

name CHAR(20)

dept INTEGER

job CHAR(20)

years INTEGER

salary DECIMAL(10,2)

comm DECIMAL(10,2)

Which of the following SQL statements will return a result set that satisfies these conditions: ? Displays the total number of employees in each department

? Displays the corresponding department ID for each department

? Includes only departments with at least one employee receiving a commission (comm) greater

than 5000

? Sorted by the department employee count from greatest to least

A. SELECT dept, COUNT(*) FROM staff GROUP BY dept HAVING comm > 5000 ORDER BY 2 DESC

B. SELECT dept, COUNT(*) FROM staff WHERE comm > 5000 GROUP BY dept, comm ORDER BY 2

DESC

C.SELECT dept, COUNT(*) FROM staffF GROUP BY dept HAVING MAX(comm) > 5000 ORDER BY

2 DESC

D. SELECT dept, comm, COUNT(id) FROM staff WHERE comm > 5000 GROUP BY dept, comm

ORDER BY 3 DESC

88.Given the following table definition:

STAFF

id INTEGER

name CHAR(20)

dept INTEGER

job CHAR(20)

years INTEGER

salary DECIMAL(10,2)

comm DECIMAL(10,2)

Where the job column contains job types: manager, clerk, and salesperson.

Which of the following statements will return the data with all managers together, all clerks together, and all salespeople together in the output?

A.SELECT * FROM staff ORDER BY job

B. SELECT job, name FROM staff GROUP BY name, job

C. SELECT * FROM staff GROUP BY name, job, id, dept, years, salary, comm

D. SELECT * FROM staff ORDER BY name, job, id, dept, years, salary, comm

42. Given the following table definition:

STAFF

id INTEGER

name CHAR(20)

dept INTEGER

job CHAR(20)

years INTEGER

salary DECIMAL(10, 2)

comm DECIMAL(10, 2)

The job column contains these job types: manager, clerk, and salesperson. Which of the following statements will return the data with all manager together, all clerks together and all salespeople together in the output?

A. SELECT * FROM staff ORDER BY job

B. SELECT job, name FROM staff GROUP BY name, job

C. SELECT * FROM staff GROUP BY name, job, id, dept, years, salary, comm

D. SELECT * FROM staff ORDER BY name, job, id, dept, years, salary, comm

43. Given the following table definition:

STAFF

id INTEGER

name CHAR(20)

dept INTEGER

job CHAR(20)

years INTEGER

salary DECIMAL(10, 2)

comm DECIMAL(10, 2)

Which of the following statements will return all of the records ordered by job with the salaries in descending order?

A. SELECT * FROM staff ORDER BY salary DESC, job

B. SELECT * FROM staff GROUP BY salary DESC, job

C. SELECT * FROM staff ORDER BY job, salary DESC

D. SELECT * FROM staff GROUP BY job, salary DESC

44. Given the table COUNTRY and the statements below:

COUNTRY

ID NAME PERSON_ID CITIES

1 Argentina 1 10

2 Canada 2 20

3 Cuba 2 10

4 Germany 1 0

5 France 7 5

Which of the following clauses when added to the statement

SELECT cities, name FROM country

Returns rows stored by NAME and then sorted by the number of cities(CITIES)?

A. ORDER BY 2, 1

B. GROUP BY 2, 1

C. ORDER BY cities, name

D. GROUP BY cities, name

45. Given the tables:

COUNTRY

ID NAME PERSON CITIES

1 Argentina 1 10

2 Canada 2 20

3 Cuba 2 10

4 Germany 1 0

5 France 7 5

STAFF

ID LASTNAME

1 Jones

2 Smith

Which of the following statements removes the rows from the COUNTRY table that have PERSONS in the STAFF table?

A. DELETE FROM country WHERE id IN (SELECT id FROM staff)

B. DELETE FROM country WHERE id IN (SELECT person FROM staff)

C. DELETE FROM country WHERE person IN (SELECT id FROM staff)

D. DELETE FROM country WHERE person IN (SELECT person FROM staff)

46. Given the table COUNTRY and the statements below:

COUNTRY

ID NAME PERSON_ID CITIES

1 Argentina 1 10

2 Canada 2 20

3 Cuba 2 10

4 Germany 1 0

5 France 7 5

STAFF

ID LASTNAME

1 Jones

2 Smith

COUNTRY(PERSON_ID) is the foreign key for STAFF(ID).

Which of the following statements removes from the COUNTRY table those rows that do not have a STAFF person assigned?

A. DELETE FROM country WHERE id IN (SELECT id FROM staff)

B. DELETE FROM country WHERE id NOT IN (SELECT person_id FROM staff)

C. DELETE FROM country WHERE person_id NOT IN (SELECT id FROM staff)

D. DELETE FROM country WHERE person_id IN (SELECT person_id FROM staff)

47. Given the tables:

COUNTRY

ID NAME PERSON CITIES

1 Argentina 1 10

2 Canada 2 20

3 Cuba 2 10

4 Germany 1 0

5 France 7 5

STAFF

ID LASTNAME

1 Jones

Smith

The statement:

INSTER INTO staff SELECT person, ‘Greyson’ FROM country WHERE person>1

Will insert how many rows into the STAFF table?

A. 0

B. 1

C. 2

D. 3

48. Given the tables:

COUNTRY

ID NAME PERSON CITIES

1 Argentina 1 10

2 Canada 2 20

3 Cuba 2 10

4 Germany 1 0

5 France 7 5

STAFF

ID LASTNAME

1 Jones

2 Smith

How many rows would be returned using the following statement?

SELECT * FROM staff, country

A. 0

B. 2

C. 5

D. 7

E. 10

49. Given the table:

STAFF

ID LASTNAME

1 Jones

2 Smith

When issuing the query “SELECT * FROM staff ”,the row return order will be based on which of the following?

A. An ambiguous order

B. The primary key order

C. The order that the rows were inserted into the table

D. The values for the ID column, then the LASTNAME column

50. Given the table:

STAFF

ID LASTNAME

1 Jones

Smith

which of the following statements removes all rows from the table where there is a NULL value for LASTNAME?

A. DELETE FROM staff WHERE lastname IS NULL

B. DELETE FROM staff WHERE lastname = “NULL”

C. DELETE ALL FROM staff WHERE lastname IS NULL

D. DELETE ALL FROM staff WHERE lastname = “NULL”

51. Given the following table definitions:

DEPARTMENT

deptno CHAR(3)

deptname CHAR(30)

mgrno I NTEGER

admrdept CHAR(3)

EMPLOYEE

empno INTEGER

firstname CHAR(30)

midinit CHAR

lastname CHAR(30)

workdept CHAR(3)

Which of the following statements will list the employee’s employee number, lastname, and department name ONLY for those employees who have a department?

A. SELECT e.empno, https://www.360docs.net/doc/cb15117661.html,stname, e.deptname FROM employee e, department d WHERE e.workdept =

d.deptno

B. SELECT e.empno, https://www.360docs.net/doc/cb15117661.html,stname, e.deptname FROM employee e LEFT OUTER JOIN department d ON

e.workdept = d.deptno

C.SELECT e.empno, https://www.360docs.net/doc/cb15117661.html,stname, e.deptname FROM employee e FULL OUTER JOIN department d ON

e.workdept = d.deptno

D. SELECT e.empno, https://www.360docs.net/doc/cb15117661.html,stname, e.deptname FROM employee e RIGHT OUTER JOIN department d ON

e.workdept = d.deptno

87.Given the following table definitions:

DEPARTMENT

deptno CHAR(3)

deptname CHAR(30)

mgrno INTEGER

admrdept CHAR(3)

EMPLOYEE

empno INTEGER

firstname CHAR(30)

midinit CHAR

lastname CHAR(30)

workdept CHAR(3)

Given that the result set should only include employees with a department, which of the following

statements will list each employee's number, last name, and department name?

A.SELECT e.empno, https://www.360docs.net/doc/cb15117661.html,stname, d.deptname FROM employee e, department d

WHERE e.workdept = d.deptno

B. SELECT e.empno, https://www.360docs.net/doc/cb15117661.html,stname, d.deptname FROM employee e LEFT OUTER JOIN department d ON

e.workdept = d.deptno

C. SELECT e.empno, https://www.360docs.net/doc/cb15117661.html,stname, d.deptname FROM employee e FULL OUTER JOIN department d

ON e.workdept = d.deptno

D. SELECT e.empno, https://www.360docs.net/doc/cb15117661.html,stname, d.deptname FROM employee e RIGHT OUTER JOIN department d

WHERE e.workdept = d.deptno

52. Given the following table definitions:

DEPARTMENT

deptno CHAR(3)

java小试题

1. 关于Java语言的特征,描述正确的是 A. 支持跨平台(Windows,Linux,Unix等) B. GC(自动垃圾回收),提高了代码安全性 C. 支持类似C的指针运算操作 D. java语言是面向对象的语言 解答:ABD 范围:corejava 难度:3 2.下列表达式正确的是 A. byte b=128; B. boolean b=null; C. long a = 2147483648L; D. float f=0.9239; 解答:C 3.下列不属于java标识符的是 A.HelloWorld B._HelloWorld C. $HelloWorld D. HelloWorld3 E. 3HelloWorld 解答:E 4. 下列代码的运行结果是: public class SwitchTest { public static void main (String []args) { System.out.println (“value =” +switchIt(4)); } public static int switchIt(int x) { int j = 1; switch (x) { case 1: j++;

case 2: j++; case 3: j++; case 4: j++; case 5: j++; default:j++; } return j + x; } } A. Value =3 B. Value =4 C. Value =5 D. Value =6 E. Value =7 F. Value =8 解答:F 5. 以下程序的输出结果为: public class test { public static void main(String args[]) { int x=1,y=1,z=1; if (x--==1&&y++==1||z++==1) System.out.println("x="+x+",y="+y+",z="+z); } } A. x=0,y=2,z=1 B. x=1,y=2,z=1 C. x=0,y=1,z=1 D. x=0,y=2,z=2 解答:A #6. 下面的程序没有编译错误的是:

2020届考试题库集锦1

2020届考试题库集锦1 1.行政法律关系当事人的行为,特别是行政机关的行为,不仅要合法而且要合理,也就是行政行为要做到合理、恰当和适度。这体现了行政法的( B ) A.程序正当性原则 B.行政合理性原则 C.行政合法性原则 D.行政应急性原则 202.权利主体依法享有直接支配特定物,并享有其利益的排他性权利属于( B ) A.债权 B.物权 C.人格权 D.身份权 203.权利人对其文学、艺术和科学作品依法享有的人身权和财产权,称为( C ) A.所有权 B.专利权 C.著作权 D.商标权 204.根据《中华人民共和国仲裁法》规定,仲裁裁决作出后,当事人就同一纠纷再申请仲裁或向人民法院起诉的,仲裁委员会或者人民法院不予受理。这体现了仲裁的( D ) A.自愿原则 B.公平原则 C.独立原则 D.一裁终局原则 205根据《中华人民共和国行政诉讼法》规定,下列选项中,属于行政诉讼受案范围的是( A ) A.不服行政处罚的案件 B.国防、外交等国家行为 C.法律规定由行政机关最终裁决的具体行政行为 D.行政机关对行政机关工作人员的奖惩、任免等决定 206中华民族在五千年发展中形成了爱国主义的优良传统。下列选项中,属于这种优良传统的有( ABCD ) A.维护祖国统一,促进民族团结 B.抵御外来侵略,捍卫国家主权 C.开发祖国山河,创造中华文明 D.心系民生苦乐,推动历史进步 207.在我国现时代,任何一个具有爱国情怀的人,都应该大力弘扬以改革创新为核心的时代精神,坚持( ABD ) A.解放思想、实事求是 B.艰苦奋斗、务求实效 C.坚守成规、畏葸不前 D.淡泊名利、无私奉献 208与法律有所不同,道德对社会行为的调节( ACD )

完整word版,Java实习总结4000字

Java实习总结4000字 一转眼,这段实习的生活过去了,回首这段时间的实习,的收获 是学到了更多的知识,增加了自己的经验,锻炼了自己,提升了自己 的水平。下面,我将实习的工作总结如下: 在注重素质教育的今天,社会实习一直被视为培养德、智、体、美、劳全面发展的跨世纪优秀人才的重要途径。毕业实习是学校教育 向课堂外的一种延伸,也是推动素质教育进程的重要手段、大学生进 入社会的桥梁。它有助于当代大学生接触社会,了解社会。同时,实 习也是大学生学习知识、锻炼才干的有效途径,更是大学生服务社会、回报社会的一种良好形式。鉴于毕业实习的以上的优点,我怀着一颗 真诚学习的心成为了其中的一员。 来到实习单位,我首先面对的是个人角色的转换及整个人际关系 的变化。学校里成绩不错的学生变成了未知领域里从头学起的实习生,而熟悉的校园也变成了陌生的企业单位,身边接触的人变成了我的前 辈我的同事我的师傅,相处之道完全不同。在这样的转变中,对于沟 通的认知显得非常苍白。于是第一次觉得自己并没有本以为的那么善 于沟通。当然,适合新的环境是需要过程的,所以我相信时间和实践 会让我很快完成这种角色的转变,真正融入到工作单位这个与学校全 然不同的社会大环境中。我还要努力实践,自觉实行角色转化。只有 将理论付诸于实践才能实现理论自身的价值,也只有将理论付诸于实 践才能使理论得以检验。同样,一个人的价值也是通过实践活动来实 现的,也只有通过实践才能锻炼人的品质,彰现人的意志。 在公司中做不出成绩时,会有来自各方面的压力,老板的眼色同 事的嘲讽。而在学校,有同学老师的关心和支持,每日仅仅上上课, 很轻松。常言道:工作一两年胜过十多年的读书。两个月的实习时间 虽然不长,但是我从中学到了很多知识,关于做人,做事,做学问。 只有拥有自信才能够克服一切,去实现自己的理想,创造自己的人生。

面向对象试题(标准答案)

CoreJavaOOP考试题 考试时间:90分钟 考试总分:100分 一、选择题(不定项选择)(22*4=88) 1. 类A,B的定义如下: class A { private int a = 100; A() { System.out.print("A()"); System.out.println(a); } } class B extends A { private int a = 200; B() { System.out.print("B()"); System.out.println(a); } } 运行下面的代码: new B(); 输出的结果是:(A )。 A. A() 100 B() 200 B. A() 200 B() 200 C. B() 200 A() 100 D. B() 200 A() 200

2.下列说法正确的是(D ) A.所有类都必须定义构造方法(构造器) B.构造方法必须初始化类的所有数据成员 C.子类定义了构造器后,不再调用父类的构造器 D.构造方法可以访问类的非静态成员 3.在Java中,哪个关键字使类不能派生子类?, (A ) A : final B : public C : private D : native 4.class Base{ static void test(){ System.out.println(“Base.test()”); } } public class Child extends Base{ static void test(){ System.out.println(“Child.test()”); } public static void main(String[] args){ Base base = new Child(); Child child = new Child(); base.test(); child.test(); } } 程序运行的结果是( C ) A.Child.test() Child.test() B.Child.test() Base.test() C.Base.test() Child.test() D.Base.test() Base.test()

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JAVA毕业设计论文题目大全

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目录 JAVA类论文题目 (2) 第1-51个题目 (2) JSP类论文题目 (3) 第1-50个题目 (3) 第50-100个题目 (4) 第101-150个题目 (5) JAVA类论文题目 第1-51个题目 1.学籍管理系统 2.Java远程通信及应用的研究 3.JAVA游戏 4.俄罗斯方块游戏 5.JAVA多线程教学演示系统 6.IPv4网络协议问题分析 7.校园网规划与设计 8.校园网络规划设计 9.办公局域网设计 10.智能小区规划 11.搜索引擎的研究与实现 12.基于Java的电子邮件接收系统 13.人事管理系统 14.题库管理系统 15.银行帐目管理系统 16.FTP客户端的设计与实现 17.办公自动化系统 18.JAVA游戏引擎开发与实践 19.宾馆客房管理系统 20.房地产信息管理系统 21.光盘管理系统 22.猜数字游戏 23.泡泡堂网络游戏 24.开发FTP系统的设计 25.局域网监听软件

26.基于纠错码的冗余技术 27.掌上网络商店 28.机主留言系统 29.基于Http协议的断点续传 30.WML信息查询设计 31.题库及试卷管理 JSP类论文题目第1-50个题目 1.网上书店 2.网上考试 3.手机销售系统 4.基于JSP技术的网络陶瓷城 5.智能道路交通信息管理系统 6.B2C的电子商务系统(J2EE) 7.网络远程作业处理系统 8.设备管理系统 9.网上购物系统设计 10.网上拍卖平台系统 11.手机游戏(J2EE) 12.网上商店系统 13.电子报销系统(J2EE) 14.公文管理系统 15.B2C电子商务平台 16.企业资产管理系统 17.会议管理系统 18.教务管理系统 19.电子商务网站 20.网络办公系统 21.毕业论文管理系统 22.网上购物系统 23.工资管理系统 24.网站流量统计系统 25.项目管理系统 26.手机销售管理系统 27.房屋交易管理系统 28.进销存管理系统 29.房管局房屋交易管理系统 30.新闻发布系统

COREJAVA第一阶段笔试题_答案(2)

选用的题目如下: 01.数组有没有length()这个方法? String有没有length()这个方法? 数组没有length方法数组提供的获得元素个数的方式是通过访问数组的length属性String也就是字符串类型有length()用于返回字符串的字符个数也就是俗话说的字数但是字符数和字节数是不同的 int num = str.getBytes().length - str.length(); 可以得到一个字符串当中有多少个汉字 02.Overload和Override的区别。Overloaded的方法是否可以改变返回值的类型?为什么? Overload:方法重载指发生在同一类当中,方法名字相同,参数列表(类型、个数、顺序)不同的两个方法 (体现静态多态) Override:方法覆盖发生在有继承关系的两个类之间子类类型当中访问控制权限修饰符不能更严格抛出的异常种类不能更广泛 方法重载的时候可以改变返回值的类型return type maybe different 因为方法名字和参数列表一旦确定在一个类当中就可以唯一确认一个方法所以即便方法返回类型不同 也能判断出来调用的是哪个方法,因而不会出错 03.== 与equals 有何区别? == 是Java当中的运算符用于比较两个引用当中存放的内存地址也就是内存指向是否相同 或者说用于判断两个对象是否是同一个对象 equals()是Java当中所有类型的父类既Object类当中的一个方法用于任何一个子类类型 通过覆盖equals从而给这个类型提供另外一种比较规则(因为java当中没有运算符重载) 很多人看到equals就认为是比较内容的方法其实不然在Object类当中equals方法当中也是采用==实现比较 04abstract class和interface有什么区别? 抽象类当中可以定义普通的属性可以定义普通的方法(有完整方法体的方法), 抽象类依然是Object的子类类型 interface从某种意义上应当理解成为更为纯粹的抽象类当时其中只能定义抽象方法和常量 接口当中定义的变量默认就是常量接口当中定义的方法默认就是抽象方法 接口的概念没有父类换言之接口不是Object类型的子类类型 05.接口是否可继承接口? 抽象类是否可实现(implements)接口? 抽象类是否可继承实体类(concrete class)? 接口可以继承接口而且可以多重继承在继承多个接口的同时子接口等价于两个接口

ppt考试题目及答案

1、在 PowerPoint 2003软件中,可以为文本、图形等对象设置动画效果,以突出重点或增加演示文稿的趣味性 设置动画效果可采用 ______________ 菜单的"自定义动画 "命令。 A :格式 B :幻灯片放映 C :工具 D :视图 答案: B 2、在幻灯片放映时,用户可以利用绘图笔在幻灯片上写字或画画,这些内容 ____________ 。 A :自动保存在演示文稿中 B :可以保存在演示文稿中 C :在本次演示中不可擦除 D :在本次演示中可以擦除 答案: D 3、 PowerPoint 2003 中放映幻灯片有多种方法,在缺省状态下,以下 A :" 幻灯片放映 " 菜单下 " 观看放映 "命令项 B :视图按钮栏上的 " 幻灯片放映 " 按钮 C :"视图"菜单下的 "幻灯片放映 " 命令项 D :在 " 资源管理器 " 中,鼠标右击演示文稿文件,在快捷菜单中选择 " 显示 " 命令 答案: B 4、在PowerPoint 2003中,为了在切换幻灯片时添加声音,可以使用 A :幻灯片放映 B :工具 C :插入 D :编辑 答案: A 5、 PowerPoint 2003 可以用彩色、灰度或黑白打印演示文稿的幻灯片、大纲、备注和 A :讲义 B :所有图片 C :所有表格 D :所有动画设置情况 ______ 可以不从第一张幻灯片开始放映。 ______ 菜单的 "幻灯片切换 " 命令。

6、在PowerPoint 2003中,如果有超出文本占位符的文本,贝U PowerPoint会_______ 。 A :不调整文本的大小,也不显示超出部分 B :自动调整文本的大小使其适合占位符 C :不调整文本的大小,超出部分自动移至下一幻灯片 D :不调整文本的大小,但可以在幻灯片放映时用滚动条显示文本 答案:B 7、PowerPoint 2003 运行于______ 环境下。 A :Windows B :DOS C :Macintosh D :UNIX 答案:A 8、PowerPoint 2003 演示文稿默认的扩展名为________ 。 A :.PPT B :.DOC C :.EXE D :.PTP 答案:A 9、在为PowerPoint 2003 的演示文稿的文本加入动画效果时,艺术字体只能实现___________ A :整批发送 B :按字发送 C :按字母发送 D :按顺序发送 答案:A 10、如果想制作一份PowerPoint 2003 的多媒体演示文稿,必须具备的硬件是__________

2019年java实训总结范文

java 实训总结范文 java 实训个人总结短短的一个月很快就过去了,在这短短的一个月里,我学到了很多,了解了很多。在这一个月里我学到了有关JAVA等方面的知识,了解了关于软件开发的流程。了解了自己的不足,知道了自己努力的方向。 回顾这次的实训,这次或许是最后的实训机会。我是一名大二的学生,明年或许就要出去实习了,所以我很珍惜这次的实训机会,因为它能够让我了解自己的不足以及以后自己努力的方向,同时也能让我了解软件开发的流程,增加一点软件开发经验和社会经验。让我在以后的实习中会更好的融入到其中,增加自己的就业机会,因为纵观现在的就业形势很不让人乐观,由于之前的经济危机,就业机会越来越少,就业也越来越难,这就给了我们很大的压力,所以要是没有真本事,就业岗位就无从谈起,因此,在以后的学习中,我会更加好好努力。 通过这次的实训,我学到了很多: 首先,对JAVA识比以前有了更深的了解。在这之前由于种种原因我JAVA学的很不好,编程我几乎写不出来。但经过这次的实训,我对JAVA的理解,虽然还有很多都不懂,但我会在今后的实训和学习中加以学习了解,力求弄懂,增强自己对JAVA的理解。 其次,在这次的实训中我的动手操作能力有了一点的提高,刚开始的时候JDK的配置,数据库的安装都出现了一定的问题,JAVA 可实话开发工具的不熟悉,所以开始的时候进程很慢,时间都用在了 JDK的配置,数据库的安装以及熟悉JAVA可视化开发工具上,但付出有

了回报,成功的配置了JDK安装了数据库,熟悉了JAVA可视化开发工 具,总的说来,自己还是有一定的收获的。因为自己的动手操纵能力得到了提高。 最后是团队协作。在整个项目完成过程中团队协作有着不可替代的作用。从在刚拿到项目时对项目的分析到最后的项目完结的都有一定的体现。刚拿到项目时,我们团队进行了分析,并分配了各自的任务。当我们其中一人遇到问题的时候,我们其他人都会去帮忙,效率提升了很多。但可能由于不是一个宿舍的,大家彼此间都不是很了解,所以交流中还是存在了一定的问题。 在这次的实训当中我收获颇丰。但仅仅靠这一个月的学习还是远远不够的。所以在以后的学习中我会更加努力,提高自己的能力,让自己在以后的社会道路上打下坚实的基础。 java 实训报告总结 作为就业培训,项目的好坏对培训质量的影响十分大,常常是决定性的作用。这篇文章是关于在学习JAVA软件开发时练习项目的总结,简单总结为以下几点: 作为就业培训,项目的好坏对培训质量的影响十分大,常常是决定性的作用。这篇文章是关于在学习JAVA软件开发时练习项目的总结,简单总结为以下几点:1、项目一定要全新的项目,不能是以前做过的2、 项目一定要企业真实项目,不能是精简以后的,不能脱 离实际应用系统3、在开发时要和企业的开发保持一致4、在做项目的时候不应该有参考代码长话短说就是以上几点,如果你想要的了解,可以继续往后看。

CoreJava第一次考试——1

考试一 试题类型:不定项选择题 试题1指出下面语句编译错误的是() A. byte b=128; B. boolean flag=null; C. long a = 2147483648L; D. float f=0.9239; 试题2完成代码计算10的阶乘并输出,应该填入的代码是()… … long result = 1; for(int i = 2; i <= 10; i++) { < 填入代码 > } System.out.println("result= " + result); … … A. result = result * i; B. result = i*i; C. result = i*(i+1); D. reslut = i*(i-1); 试题3下列关于数组的声明错误的是()

A. int[] arry = new int[100]; B. int[3] arry = {1,2,3} C. int[] arry = new int[]{1,2,3} D. int[][] arry = new int[3][] 试题4语句System.out.println(1+2+"java"+3+4)输出的结果是()。 A. 3java34 B. 12java34 C. 3java7 D. 12java7 试题5下面程序的输出结果是() public static void main(String[] args) { int d = 325; int sum = 0; while (d > 0) { int n = d % 10; sum += n; d /= 10; } System.out.println(sum);

小学英语考试试题集锦

小学英语考试试题集锦 一、情景匹配 A () did you do A. At ten past five. () you have a good time B. English songs. () did you make the kite C. Some fish. () did you go home D. He watched TV. () food did you eat E. It’s on the first of October.() you like English F. Sorry, I don’t know.() songs did you sing G. At home. () did Mr Green do H. Yes, I like it. () is National Day I. I ate some sweets. () she like computer games J. Yes, I did. B () colour are her eyes A. Sorry, I can’t. () it a map of Nanjing B. He’s from England, I think. () I sit beside you C. Yes, I am. () there any storybooks on the bed D. Thank you. () is your bag E. OK. Let’s go. () is Jack from F. They’re blue. ()’s play table tennis. G. No, it’s a map of Shanghai. () flowers are for you. H. The red and brown one.() you speak Chinese I. Yes, there are. ()10. Are you a new teacher in this school J. Of course, please. C ( ) 1. Welcome to our school . A. No, it’s over there. ( ) 2. What do you want B. I’d like a toy cat. ( ) 3. Tom, open the windows, please. C. Thank you. ( ) 4. What’s under the chair D. No, I can’t. ( ) 5. Is the post office here E. They’re some bags. ( ) 6. Can you see my bookmark F. All right. ( ) 7. Who’s that over there G. She’s very good. ( ) 8. How about that new doctor H. That’s my mother. D ( ) 1. Do you usually have a birthday party A. It’s on the 25th of August. ( ) 2. What would you like B. It’s February. ( ) 3. When’s your brother’s birthday C. Sure, let’s go. ( ) 4. What date is it today D. It’s Thursday. ( ) 5. Would you like some pies E. Yes, please. ( ) 6. What’s the second month of a year F. Yes, I do. ( ) 7. Whose birthday is it G. I’d like that red dress.

大学生java实训总结范文

( 实习报告 ) 单位:_________________________ 姓名:_________________________ 日期:_________________________ 精品文档 / Word文档 / 文字可改 大学生java实训总结范文Summary of College Students' java training

大学生java实训总结范文 大学生java实训总结范文 总结一:java实训个人总结 短短的一个月很快就过去了,在这短短的一个月里,我学到了很多,了解了很多。在这一个月里我学到了有关JAVA等方面的知识,了解了关于软件开发的流程。了解了自己的不足,知道了自己努力的方向。 回顾这次的实训,这次或许是最后的实训机会。我是一名大二的学生,明年或许就要出去实习了,所以我很珍惜这次的实训机会,因为它能够让我了解自己的不足以及以后自己努力的方向,同时也能让我了解软件开发的流程,增加一点软件开发经验和社会经验。让我在以后的实习中会更好的融入到其中,增加自己的就业机会,因为纵观现在的就业形势很不让人乐观,由于之前的经济危机,就

业机会越来越少,就业也越来越难,这就给了我们很大的压力,所以要是没有真本事,就业岗位就无从谈起,因此,在以后的学习中,我会更加好好努力。 通过这次的实训,我学到了很多: 首先,对JAVA识比以前有了更深的了解。在这之前由于种种原因我JAVA学的很不好,编程我几乎写不出来。但经过这次的实训,我对JAVA的理解,虽然还有很多都不懂,但我会在今后的实训和学习中加以学习了解,力求弄懂,增强自己对JAVA的理解。 其次,在这次的实训中我的动手操作能力有了一点的提高,刚开始的时候JDK的配置,数据库的安装都出现了一定的问题,JAVA 可实话开发工具的不熟悉,所以开始的时候进程很慢,时间都用在了JDK的配置,数据库的安装以及熟悉JAVA可视化开发工具上,但付出有了回报,成功的配置了JDK,安装了数据库,熟悉了JAVA可视化开发工具,总的说来,自己还是有一定的收获的。因为自己的动手操纵能力得到了提高。 最后是团队协作。在整个项目完成过程中团队协作有着不可替

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