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One 、SQL Database multiple choice questions （ Each question 2.5 branch , common 20 topic ）

Two 、LINUX choice question （ Each question 2.5 branch , common 10 topic ）

3、 ... and 、 LINUX Completion （ Each question 5 branch , common 5 topic ）

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One 、SQL Database multiple choice questions （ Each question 2.5 branch , common 20 topic ）

1.SQL refer to ？ ( )

A.Strong Question Language

B.Structured Question Language

C.Structured Query Language

2. that SQL Statement is used to extract data from a database ？ ( )

A.EXTRACT

B.SELECT

C.OPEN

D.GET

3. Which one SQL Statement is used to update data in the database ？ ( )

A.MODIFY

B.SAVE AS

C.UPDATE

D.SAVE

4. Which one SQL Statement is used to delete data in a database ？ ( )

A.COLLAPSE

B.DELETE

C.REMOVE

5. Which one SQL Statement is used to insert new data into the database ？ ( )

A.INSERT NEW

B.ADD RECORD

C.ADD NEW

D.INSERT INTO

                      

 

6. adopt SQL, How do you get from "Persons" Select in the table "FirstName" Column ？ ( )

A.SELECT Persons.FirstName

B.SELECT FirstName FROM Persons

C.EXTRACT FirstName FROM Persons

7. adopt SQL, How do you get from "Persons" Select all the lists in the table ？ ( )

A. SELECT [all] FROM Persons

B. SELECT Persons

C. SELECT * FROM Persons

D. SELECT *.Persons

8． adopt SQL, How do you get from "Persons" Select in the table "FirstName" The value of the column is equal to "Peter" All records ？ ( )

A.SELECT [all] FROM Persons WHERE FirstName='Peter'

B.SELECT * FROM Persons WHERE FirstName LIKE 'Peter'

C.SELECT [all] FROM Persons WHERE FirstName LIKE 'Peter'

D.SELECT * FROM Persons WHERE FirstName='Peter'

9. adopt SQL, How do you get from "Persons" Select in the table "FirstName" The value of the column is in "a" All the notes at the beginning

record ？ ( )

A.SELECT * FROM Persons WHERE FirstName LIKE 'a%'

B.SELECT * FROM Persons WHERE FirstName='a'

C.SELECT * FROM Persons WHERE FirstName LIKE '%a'

D.SELECT * FROM Persons WHERE FirstName='%a%'

10． Please judge whether the following statement is correct ： When one of the listed conditions is true when ,OR The operator will display the record . When all the conditions listed are true when ,AND The operator will display the record . ( )

A. correct

C. error

11． adopt SQL, How do you watch Persons Choose from FirstName be equal to Thomas and LastName be equal to Carter All records ？ ( )

A.SELECT * FROM Persons WHERE FirstName LIKE 'Thomas' AND LastName LIKE 'Carter'

B.SELECT FirstName='Thomas', LastName='Carter' FROM Persons

C.SELECT * FROM Persons WHERE FirstName='Thomas' AND LastName='Carter'

                     

 

12． adopt SQL, How do you select... Alphabetically Persons In the table LastName Be situated between Adams and Carter All records ？ （ ）

A.SELECT * FROM Persons WHERE LastName BETWEEN 'Adams' AND 'Carter'

B.SELECT * FROM Persons WHERE LastName>'Adams' AND LastName<'Carter'

C.SELECT LastName>'Adams' AND LastName<'Carter' FROM Persons

13． Which one SQL Statement can return a unique different value ？ ( )

A.SELECT DIFFERENT

B.SELECT DISTINCT

C.SELECT UNIQUE

14． that SQL Keywords are used to sort the results ？ ( )

A.ORDER

B.SORT BY

C.SORT

D.ORDER BY

15. adopt SQL, How do you base on "FirstName" Slightly descending from "Persons" Table returns all records ？( )

A.SELECT * FROM Persons SORT 'FirstName' DESC

B.SELECT * FROM Persons ORDER BY FirstName DESC

C.SELECT * FROM Persons ORDER FirstName DESC

D.SELECT * FROM Persons SORT BY 'FirstName' DESC

16. adopt SQL, How would you like to "Persons" The expression inserts a new record ？( )

A.INSERT ('Jimmy', 'Jackson') INTO Persons

B.INSERT VALUES ('Jimmy', 'Jackson') INTO Persons

C.INSERT INTO Persons VALUES ('Jimmy', 'Jackson')

17. adopt SQL, How would you like to "Persons" In the table "LastName" Don't insert "Wilson" ？( )

A.INSERT INTO Persons (LastName) VALUES ('Wilson')

B.INSERT ('Wilson') INTO Persons (LastName)

C.INSERT INTO Persons ('Wilson') INTO LastName

                    

 

18. How do you put "Persons" In the table "LastName" Column "Gates" Change it to "Wilson" ？( )

A.MODIFY Persons SET LastName='Wilson' WHERE LastName='Gates'

B.UPDATE Persons SET LastName='Wilson' WHERE LastName='Gates'

C.UPDATE Persons SET LastName='Wilson' INTO LastName='Gates'

D.MODIFY Persons SET LastName='Wilson' INTO LastName='Gates'

19. adopt SQL, How are you in "Persons" In the table to delete "FirstName" be equal to "Fred" The record of ？( )

A.DELETE FROM Persons WHERE FirstName = 'Fred'

B.DELETE FirstName='Fred' FROM Persons

C.DELETE ROW FirstName='Fred' FROM Persons

20. adopt SQL, How do you return to "Persons" The number recorded in the table ？( )

A.SELECT COLUMNS( ) FROM Persons

B.SELECT COLUMNS(*) FROM Persons

C.SELECT COUNT( ) FROM Persons

D.SELECT COUNT(*) FROM Persons

Two 、LINUX choice question （ Each question 2.5 branch , common 10 topic ）

1． If you forget ls command reference , May adopt （ ） Order help

A.？ls

B.help ls

C.man ls

D.get ls

2. To file file1 The command with the executable attribute of others is （ ）

A.chmod a+x

B.chown a+x

C.chmod o+x

D.chown o+x

3. The command to view all processes in the system is （ ）

A.ps all

B.ps aix

C.ps auf

D.ps aux

4. The file permissions that all users can read are （ ）

A.777

B.444

C.644

D.640

5. Use $cd ~ After the command , We will enter ( ) Catalog .

A. /

B. ~

C. User's home directory

D. /tmp

6. In order to archive the compressed files in the current directory myftp.tar.gz decompression , We can use ：( )

A.tar -xvzf myftp.tar.gz

B.tar -xvz myftp.tar.gz

C.tar -vzf myftp.tar.gz

D.tar -xvf myftp.tar.gz

7. The permissions of a file are -rw-rw-r--, The permissions of the owner of this file are （ ）

A.read-only

B.write

C.read-write

8. stay vi In the editor , command “dd” Used to delete the current location ( )

A. character

B. That's ok

C. Variable

D. word

9. What command to use to merge two files into one file ？( )

A.cat

B.grep

C.awk

D.cut

10. About bash The correct argument of variables is ：( )

A. Can be in /etc/porfile The settings in it take effect for all users , permanent

B. In the user's home directory .bash_profile Adding variables to the file takes effect for a single user , Provisional entry into force

C. have access to export Definition , Only for the present shell take effect , Permanent validity

D. None of the above is true

3、 ... and 、 LINUX Completion （ Each question 5 branch , common 5 topic ）

1. Create a name in the current directory as 1 Directory command , And create cascading directories 1/2/3/ The order of ？ Complete... With one command

2. Several commands for viewing the application log （ Write two ）

3. To execute sh Word of the file , Add attribute .

4.VI The save and exit command inside is

5. The command is used to check how much space the hard disk is occupied and how much space is left .

            

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