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Oracle Database 23ai Administration Associate Sample Questions (Q25-Q30):

NEW QUESTION # 25
Which three relationships between instances and Oracle databases are possible without using Multi-tenant?

A. Two or more instances on separate servers all mounting and opening the same database.
B. One instance on one server mounting and opening one database.
C. One instance on one server mounting and opening multiple databases.
D. One instance on one server that has no database mounted.
E. One instance on one server mounting multiple databases.

Answer: A,B,D

Explanation:
A .False. One instance can't mount multiple DBs without multitenant.
B .True. RAC allows multiple instances to share one DB.
C .False. Same as A; not possible without CDB.
D .True. An instance can start in NOMOUNT with no DB.
E .True. Standard single-instance configuration.

NEW QUESTION # 26
Which two statements are true about views used for viewing tablespace and datafile information?

A. V$TABLESPACE displays information about tablespaces contained in the data dictionary.
B. V$TABLESPACE displays information that is contained in the control file about tablespaces.
C. A datafile can be renamed when the database is in MOUNT state and the new file name is displayed when querying DBA_DATA_FILES after the database is opened.
D. Tablespace free space can be viewed in V$TABLESPACE.
E. Tablespace free space can be viewed in DBA_TABLESPACES.

Answer: B,C

Explanation:
A .False. V$TABLESPACE doesn't show free space directly.
B .False. It's from the control file, not the data dictionary.
C .True. Renaming in MOUNT state updates DBA_DATA_FILES post-open.
D .False. DBA_TABLESPACES shows attributes, not free space directly (use DBA_FREE_SPACE).
E .True. V$TABLESPACE reflects control file data.

NEW QUESTION # 27
In one of your databases, you create a user, HR, and then execute this command: GRANT CREATE SESSION TO hr WITH ADMIN OPTION; Which three actions can HR perform?

A. Grant the CREATE SESSION privilege with ADMIN OPTION to other users.
B. Execute DML statements in the HR schema.
C. Execute DDL statements in the HR schema.
D. Revoke the CREATE SESSION privilege from user HR.
E. Revoke the CREATE SESSION privilege from other users.
F. Log in to the database instance.

Answer: A,E,F

Explanation:
A .False. CREATE SESSION doesn't grant DML rights.
B .True. CREATE SESSION allows login.
C .True. WITH ADMIN OPTION allows revoking from others HR granted it to.
D .True. WITH ADMIN OPTION permits granting with the same option.
E .False. Users can't revoke their own privileges.
F .False. DDL requires additional privileges (e.g., CREATE TABLE).

NEW QUESTION # 28
Examine these commands:
[oracle@host01 ~]$ sqlplus u1/oracle
SQL> SELECT * FROM emp;
ENO ENAME DN
-------------------------
1 Alan 2
2 Ben 2
SQL> exit
[oracle@host01 ~]$ cat emp.dat
1, Alan, 2
3, Curl, 4
4, Bob, 4
[oracle@host01 ~]$ sqlldr u1/oracle TABLE=emp
Which two statements are true?

A. It overwrites all data in EMP with data from EMP.DAT.
B. It generates a SQL script that it uses to load data from EMP.DAT to EMP.
C. It overwrites the data for Alan and adds data for Curl and Bob.
D. It generates a log that contains control file entries, which can be used with normal SQL*Loader operations.
E. It appends data from EMP.DAT to EMP.

Answer: D,E

Explanation:
SQL*Loader (sqlldr) loads data from external files into Oracle tables. The command sqlldr u1/oracle TABLE=emp uses defaults since no control file is specified. Let's evaluate:
A . It overwrites the data for Alan and adds data for Curl and Bob.
False. SQLLoader's default mode is APPEND, not REPLACE. It doesn't "overwrite" existing rows unless REPLACE or TRUNCATE is specified in a control file. Here, row 1, Alan, 2 exists, and SQLLoader will either skip it (if a primary key rejects duplicates) or raise an error, but it won't overwrite. 3, Curl, 4 and 4, Bob, 4 are appended.
Mechanics:Without a control file, SQL*Loader assumes APPEND and matches columns positionally (ENO, ENAME, DN).
B . It generates a log that contains control file entries, which can be used with normal SQL*Loader operations.
True. SQL*Loader always generates a log file (e.g., emp.log) when invoked. With no control file specified, it auto-generates one internally and logs it, including entries like LOAD DATA INFILE 'emp.dat' APPEND INTO TABLE emp FIELDS TERMINATED BY ',' (ENO, ENAME, DN). This can be reused.
Practical Use:The log's control section is editable for future runs (e.g., changing to REPLACE).
C . It appends data from EMP.DAT to EMP.
True. Default behavior without a control file is APPEND, adding new rows (3, Curl, 4 and 4, Bob, 4) to EMP. Existing rows (1, Alan, 2, 2, Ben, 2) remain unless constrained (e.g., unique key violations).
Mechanics:SQL*Loader processes each line of emp.dat, skipping duplicates if constrained, appending otherwise.
D . It generates a SQL script that it uses to load data from EMP.DAT to EMP.
False. SQL*Loader doesn't generate SQL scripts; it uses direct path or conventional path loading, not SQL scripts. The log contains control file syntax, not a script.
E . It overwrites all data in EMP with data from EMP.DAT.
False. REPLACE or TRUNCATE would overwrite, but these require a control file with those options. Default APPEND preserves existing data.

NEW QUESTION # 29
Which two statements are true about the configuration and use of UNDO?

A. Active UNDO is always retained.
B. UNDO_RETENTION specifies for how long Oracle attempts to keep expired and unconsumed UNDO.
C. UNDO_RETENTION specifies for how long Oracle attempts to keep unexpired UNDO.
D. UNDO_RETENTION specifies how long all types of UNDO are retained.
E. Unexpired UNDO is always retained.

Answer: A,C

Explanation:
A .True. Active (in-use) UNDO is never overwritten.
B .False. Unexpired UNDO can be reused if space is needed.
C .False. Applies to unexpired, not expired UNDO.
D .False. Only unexpired UNDO is targeted.
E .True. UNDO_RETENTION sets the retention goal for unexpired UNDO.

NEW QUESTION # 30
......

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Oracle Database 23ai Administration Associate Sample Questions (Q25-Q30):

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