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单选题 To allocate another role to a user, which command is most appropriate?()

A

ALTER USER 

B

ALTER DATABASE 

C

ALTER SYSTEM 

D

GRANT

单选题  A user issues a SELECT command against the Oracle database. Which of the following choices describes a step that Oracle will execute in support of this statement?()

A

Acquire locks on table queried 

B

Generate redo for statement 

C

Fetch data from disk into memory 

D

Write changes to disk

单选题 The DBA is defining role for users. Which of the following is not an acceptable method for defining a default role?()

A

ALTER USER DEFAULT ROLE ALL

B

ALTER USER DEFAULT ROLE ALL EXCEPT ROLE_1

C

ALTER USER DEFAULT ROLE NONE

D

ALTER USER DEFAULT ROLE NONE EXCEPT ROLE_1

单选题 ou are implementing control file multiplexing. Which of the following choices identifies the method you can use in order to generate the control file copies that Oracle will maintain?()

A

Issue ALTER DATABASE BACKUP CONTROLFILE TO filename

B

Make a copy of the control file with the database shut down

C

Issue ALTER DATABASE BACKUP CONTROLFILE TO trace

D

Make a copy of the control file with the database still running 

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