Valid Exam 1Z0-083 Blueprint & Reliable 1Z0-083 Dumps Questions

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Oracle 1Z0-083 Exam covers various topics related to database administration, including backup and recovery, performance tuning, security, and database upgrades. 1Z0-083 exam is designed to test the candidate's knowledge and skills in managing and maintaining Oracle databases, ensuring their availability, reliability, and security.

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Oracle Database Administration II Sample Questions (Q113-Q118):

NEW QUESTION # 113
Which two are true about reclaiming space used by Flashback logs in Oracle Database 19c and later releases? (Choose two.)

A. Space is always reclaimed proactively before space pressure occurs.
B. Space is only reclaimed when there is space pressure in the Fast Recovery Area. (FRA)
C. Space might be reclaimed proactively before space pressure occurs.
D. Space might be reclaimed automatically when the retention period for Flashback logs is lowered.
E. Space is always reclaimed automatically when the retention period for Flashback logs is lowered.

Answer: B,D

NEW QUESTION # 114
Which two are true about poorly performing SQL statements and their tuning in Oracle database instances? (Choose two.)

A. SQL statements doing joins always do more physical I/O than single table queries.
B. SQL statements performing many physical I/Os can always have their performance improved by creating indexes.
C. Poorly performing SQL statements can be tuned automatically by the Oracle server.
D. SQL statements doing only logical reads never require tuning because they do no physical I/O.
E. The solution that best optimizes one SQL statement can degrade the performance of others.

Answer: C,E

Explanation:
https://docs.oracle.com/cd/B28359_01/server.111/b28274/sql_tune.htm#PFGRF028

NEW QUESTION # 115
Which three are located by using environment variables? (Choose three.)

A. the Optimal Flexible Architecture (OFA) compliant path to store Oracle software and configuration files.
B. the maximum number of database files that can be opened by a database instance
C. default directories for temporary files used by temporary tablespaces
D. the temporary disk space used by Oracle Installer during installation
E. the location of Oracle Net Services configuration files
F. the list of a disk group names to be mounted by an Oracle Automatic Storage Management (ASM) instance at startup

Answer: A,D,E

Explanation:
A - ORACLE_BASE, ORACLE_HOME - correct
B - TNS_ADMIN, old TWO_TASK, etc - correct
C - spfile parameter ASM_DISKGROUPS, not env variable
D - [s]pfile parameter DB_CREATE_FILE_DEST, not env variable
E - TMP, TEMP - correct
F - [s]pfile parameter DB_FILES, not env variable

NEW QUESTION # 116
Which four are true about a Recovery Manager (RMAN) duplication without a TARGET connection? (Choose four.)

A. RMAN SBT-based backups of the database to be duplicated can be used by the auxiliary instance.
B. The UNDO TABLESPACE clause is always required when no connection exists to the recovery catalog and the TARGET database is closed.
C. The UNDO TABLESPACE clause is always required when no connection exists to the TARGET instance.
D. The UNDO TABLESPACE clause is always required when no connection exists to the recovery catalog and the TARGET database is opened.
E. The NOREDO clause must be used if the backups of the database being duplicated were taken when the database was in NOARCHIVELOG mode.
F. RMAN "pushes" the backups of the database to be duplicated over the network to the auxiliary instance.
G. The NOREDO clause can be used if the backups of the database being duplicated were taken when the database was in ARCHIVELOG mode.
H. RMAN disk-based backups of the database to be duplicated can be used by the auxiliary instance.

Answer: C,D,E,H

Explanation:
Reference:
http://oradb-srv.wlv.ac.uk/ora12c/RCMRF/rcmsynta020.htm

NEW QUESTION # 117
On the 10th of August, you implement an incremental database backup strategy and configure a recovery window of five days.
Level 0 backups are taken on the 10th, 17th, and 24th of August. Differential level 1 incremental backups are taken daily between the level 0 backups.
Today is the 26th of August.
Which backups will be obsolete?

A. all backups prior to 10th of August
B. all backups prior to 22nd of August
C. all backups prior to 20th of August
D. all backups prior to 24th of August
E. all backups prior to 17th of August

Answer: E

NEW QUESTION # 118
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