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Oracle Database 23ai Administration Associate Sample Questions (Q16-Q21):

NEW QUESTION # 16
In which two ways would you disable timing information collected for wait events and much of the performance monitoring capability of the database?

A. By executing the PL/SQL procedure DBMS_TIME_STATISTIC.DISABLE(TRUE).
B. By setting the TIMED_STATISTICS system parameter to FALSE.
C. By setting the TIMED_STATISTICS_LEVEL system parameter to FALSE.
D. By setting the STATISTICS_LEVEL parameter to BASIC.
E. By executing the PL/SQL procedure DBMS_TIME_STATISTIC.LEVEL(BASIC).

Answer: B,D

Explanation:
A .True. TIMED_STATISTICS = FALSE disables timing data collection.
B .False. No such procedure exists.
C .False. No TIMED_STATISTICS_LEVEL parameter exists.
D .True. STATISTICS_LEVEL = BASIC disables most performance monitoring.
E .False. No such procedure exists.

NEW QUESTION # 17
At which two container database levels can COMMON Unified Audit Policies be used?

A. At the Application Root level of an Application Container.
B. At the PDB level if the policy is created by a COMMON user.
C. At the CDB level.
D. At any level by using the COMMON option in the policy.
E. COMMON Unified Audit Policies can only be created at CDB level to monitor DBA operation at any level.

Answer: B,C

Explanation:
A .False. Not limited to CDB; PDBs can use common policies.
B .True. Common policies apply at CDB level.
C .False. Application Root uses app-specific policies.
D .False. "COMMON option" isn't a feature; policies are common by creation context.
E .True. A common user can create policies for PDBs.

NEW QUESTION # 18
What are Optimizer Statistics?

A. Optimizer Statistics are a set of data distribution statistics collected in real time as data is inserted, deleted, or updated, which are stored in AWR and used for generating SQL execution plans.
B. Optimizer Statistics are statistics about data distribution within Oracle Datafiles.
C. Optimizer Statistics are part of system performance statistics stored in AWR required for calculating SQL execution plans.
D. Optimizer Statistics are table, column, index, and system statistics used for generating efficient SQL execution plans.

Answer: D

Explanation:
A .False. Not real-time; collected periodically.
B .False. Not about datafile distribution.
C .True. Includes table, column, index stats for plan generation.
D .False. Stored in data dictionary, not AWR.

NEW QUESTION # 19
Which three statements are true about roles?

A. The SET ROLE statement can disable one or more roles for a session.
B. Roles may be granted to other roles.
C. The SET ROLE statement can enable one or more roles for a session.
D. Roles must be password protected.
E. Object privileges may not be granted to roles.
F. All roles granted to a user are set on default when the user logs in.

Answer: A,B,C

Explanation:
Roles in Oracle manage privileges efficiently. Let's dive into each option:
A . Roles must be password protected.
False. Roles can be password-protected (e.g., CREATE ROLE mgr IDENTIFIED BY secret), but it's optional. Non-protected roles (default) are enabled automatically if granted, requiring no password.
Mechanics:Password-protected roles need SET ROLE mgr IDENTIFIED BY secret, enhancing security for sensitive privileges.
B . Roles may be granted to other roles.
True. Roles can form hierarchies (e.g., GRANT clerk TO mgr), allowing nested privilege management.
Mechanics:A user with mgr inherits clerk privileges indirectly. Revoking clerk from mgr cascades appropriately.
Practical Use:Simplifies complex privilege structures in large organizations.
C . The SET ROLE statement can enable one or more roles for a session.
True. SET ROLE role1, role2; activates specified roles for the session, assuming they're granted and not password-protected (or password is provided).
Mechanics:Enabled roles grant their privileges immediately within the session scope.
D . Object privileges may not be granted to roles.
False. Object privileges (e.g., GRANT SELECT ON emp TO clerk) are a primary use of roles, making this statement incorrect.
Why Incorrect:Roles are designed for this purpose, contradicting the option.
E . All roles granted to a user are set on default when the user logs in.
False. Only roles marked as DEFAULT ROLE (via ALTER USER ... DEFAULT ROLE role1) are enabled at login. Non-default roles require SET ROLE.
Mechanics:Check via SELECT * FROM DBA_ROLE_PRIVS WHERE DEFAULT_ROLE='YES'.
F . The SET ROLE statement can disable one or more roles for a session.
True. SET ROLE NONE disables all roles, or SET ROLE role1 implicitly disables others not listed, providing granular control.
Practical Use:Useful for testing or restricting privileges temporarily.

NEW QUESTION # 20
Which two tasks can be performed in the NOMOUNT state?

A. Creating a database.
B. Renaming data files.
C. Full database recovery.
D. Re-creating control files.
E. Enabling online redo log archiving.

Answer: A,D

Explanation:
A .False. Requires MOUNT to access data files.
B .False. Requires MOUNT for redo logs.
C .True. CREATE DATABASE runs in NOMOUNT.
D .True. CREATE CONTROLFILE is possible.
E .False. Recovery needs MOUNT or OPEN.

NEW QUESTION # 21
......

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Oracle Database 23ai Administration Associate Sample Questions (Q16-Q21):

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