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Oracle Database 23ai Administration Associate Sample Questions (Q12-Q17):

NEW QUESTION # 12
Which of the following statements is true about external tables?

A. They are read/write tables.
B. They describe data stored in the database.
C. They describe how the external table layer presents data to the server.
D. They describe how data is stored in the external source.

Answer: C

Explanation:
A .False. External tables are read-only.
B .True. Defines how external data (e.g., CSV) is mapped to SQL.
C .False. Data is external, not in the DB.
D .False. Storage is external; Oracle doesn't define it.

NEW QUESTION # 13
Which three statements are true about roles?

A. The SET ROLE statement can disable one or more roles for a session.
B. All roles granted to a user are set on default when the user logs in.
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. Roles may be granted to other roles.

Answer: A,C,F

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 # 14
Examine this command: SQL> ALTER TABLE ORDERS SHRINK SPACE COMPACT; Which two statements are true?

A. Dependent indexes become UNUSABLE.
B. Only queries are allowed on ORDERS while SHRINK is executing.
C. The SHRINK operation causes rows to be moved to empty space starting toward the end of the ORDERS segment.
D. Queries and DML statements are allowed on ORDERS while the SHRINK is executing.
E. The SHRINK operation causes rows to be moved to empty space starting from the beginning of the ORDERS segment.
F. The high-water mark (HWM) of ORDERS is adjusted.

Answer: D,E

Explanation:
A . Dependent indexes become UNUSABLE.False. SHRINK SPACE COMPACT does not affect index usability; only SHRINK SPACE without COMPACT may require index maintenance if CASCADE is omitted.
B . ... starting toward the end of the ORDERS segment.False. Rows are compacted toward the beginning of the segment, not the end.
C . Only queries are allowed ...False. Both queries and DML are allowed during SHRINK SPACE COMPACT as it's an online operation.
D . The high-water mark (HWM) of ORDERS is adjusted.False. COMPACT moves rows but doesn't adjust the HWM; the full SHRINK SPACE command is needed for HWM adjustment.
E . Queries and DML statements are allowed ...True. This is an online operation in 23ai, allowing concurrent access.
F . ... starting from the beginning of the ORDERS segment.True. Rows are moved to fill free space from the segment's start.

NEW QUESTION # 15
Which three statements are true about using SQL*Plus?

A. It can run scripts passed to it by a shell script.
B. It can run Recovery Manager (RMAN) commands.
C. It can run scripts entered at the SQL prompt.
D. It has both command-line and graphical user interfaces (GUI).
E. It must be downloaded from the Oracle Technology Network (OTN).
F. It has its own commands that are separate from any SQL statements.

Answer: A,C,F

Explanation:
A .True. sqlplus @script.sql works from shell scripts.
B .False. RMAN uses its own client, not SQL*Plus.
C .False. Bundled with Oracle DB software.
D .False. Command-line only; no GUI in 23ai.
E .True. @script runs scripts interactively.
F .True. Commands like SHOW PARAMETER are unique.

NEW QUESTION # 16
One of your database instances was shut down normally and then started in NOMOUNT state. You then executed this command: ALTER DATABASE MOUNT; Which two of these actions are performed?

A. The initialization parameter file is read.
B. The alert log has instance startup details written to it.
C. Online redo logs are opened.
D. Online data files are opened.
E. Oracle shared memory structures are allocated.
F. Control files are read.

Answer: B,F

Explanation:
A .False. Data files open in OPEN.
B .False. Redo logs open in OPEN.
C .False. PFILE/SPFILE is read at NOMOUNT.
D .False. SGA is allocated at NOMOUNT.
E .True. Alert log records mount event.
F .True. Control files are read in MOUNT.

NEW QUESTION # 17
......

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