ORACLE 1Z1-182 ACCURATE PREP MATERIAL | EXAM 1Z1-182 FORUM

Oracle 1Z1-182 Accurate Prep Material | Exam 1Z1-182 Forum

Oracle 1Z1-182 Accurate Prep Material | Exam 1Z1-182 Forum

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100% Pass 2025 High Hit-Rate 1Z1-182: Oracle Database 23ai Administration Associate Accurate Prep Material

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Oracle Database 23ai Administration Associate Sample Questions (Q90-Q95):

NEW QUESTION # 90
Which two statements are true about views used for viewing tablespace and datafile information?

  • A. 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.
  • B. V$TABLESPACE displays information that is contained in the control file about tablespaces.
  • C. Tablespace free space can be viewed in DBA_TABLESPACES.
  • D. V$TABLESPACE displays information about tablespaces contained in the data dictionary.
  • E. Tablespace free space can be viewed in V$TABLESPACE.

Answer: A,B

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 # 91
Which two statements describe how Optimizer Statistics are collected?

  • A. Optimizer Statistics are collected in real-time as data is inserted, deleted, or updated.
  • B. Optimizer Statistics can be manually collected at multiple levels using DBMS_STATS.GATHER_*_STATS PL/SQL procedures.
  • C. Optimizer Statistics are collected by the Statistics Advisor.
  • D. Optimizer Statistics are collected automatically by Automatic Workload Repository (AWR) Snapshot.
  • E. Optimizer Statistics are collected automatically by an automatic maintenance job that runsduring predefined maintenance windows.

Answer: B,E

Explanation:
Optimizer Statistics drive the cost-based optimizer's query plans. Let's dissect each option:
A . Optimizer Statistics are collected automatically by an automatic maintenance job that runs during predefined maintenance windows.
True. Oracle 23ai uses the AutoTask framework to gather stats automatically during maintenance windows (e.g., nightly 10 PM-2 AM). The GATHER_STATS_PROG job, managed by DBMS_AUTO_TASK_ADMIN, collects stats for stale or missing objects.
Mechanics:Controlled by STATISTICS_LEVEL=TYPICAL (default) and the DEFAULT_MAINTENANCE_PLAN. It prioritizes objects with >10% changes (stale stats) or no stats.
Practical Use:Ensures stats are current without manual intervention, critical for dynamic workloads.
Edge Case:Disabled if STATISTICS_LEVEL=BASIC or the job is manually disabled via DBMS_AUTO_TASK_ADMIN.DISABLE.
B . Optimizer Statistics are collected in real-time as data is inserted, deleted, or updated.
False. Stats aren't updated in real-time; this would be too resource-intensive. Instead, Oracle tracks changes (e.g., via DBA_TAB_MODIFICATIONS) and updates stats periodically via AutoTask or manually. Real-time stats exist in 23ai for specific cases (e.g., GATHER_TABLE_STATS with REAL_TIME_STATS), but it's not the default.
Why Incorrect:Real-time collection would degrade performance for OLTP systems, contradicting Oracle's batch approach.
C . Optimizer Statistics can be manually collected at multiple levels using DBMS_STATS.GATHER_*_STATS PL/SQL procedures.
True. The DBMS_STATS package offers granular control: GATHER_TABLE_STATS, GATHER_SCHEMA_STATS, GATHER_DATABASE_STATS, etc., allowing stats collection for tables, schemas, or the entire database.
Mechanics:Example: BEGIN DBMS_STATS.GATHER_TABLE_STATS('HR', 'EMPLOYEES'); END;. Options like ESTIMATE_PERCENT and DEGREE fine-tune the process.
Practical Use:Used for immediate stats updates post-DML or for custom schedules outside maintenance windows.
Edge Case:Overuse can lock stats (e.g., FORCE=TRUE), requiring careful management.
D . Optimizer Statistics are collected by the Statistics Advisor.
False. The Statistics Advisor (new in 23ai) analyzes and recommends stats improvements but doesn't collect them. Collection is still via DBMS_STATS or AutoTask.
Why Incorrect:It's a diagnostic tool, not an executor.
E . Optimizer Statistics are collected automatically by Automatic Workload Repository (AWR) Snapshot.
False. AWR snapshots capture performance metrics (e.g., wait times), not optimizer stats. Stats collection is a separate process via AutoTask or manual commands.
Why Incorrect:AWR and stats collection serve distinct purposes-monitoring vs. optimization.


NEW QUESTION # 92
What memory structure caches the data dictionary providing access to all database user processes?

  • A. The Streams Pool
  • B. The Large Pool
  • C. The Shared Pool
  • D. The Java Pool

Answer: C

Explanation:
D .True. The Shared Pool caches data dictionary metadata (e.g., table definitions) in the Library Cache and Dictionary Cache, accessible to all processes. Others serve different purposes (e.g., Large Pool for backups).


NEW QUESTION # 93
You execute this command: [oracle@host01 ~]$ expdp system/oracle FULL=Y DUMPFILE=exp_db_full.dmp PARALLEL=4 LOGFILE=exp_db_full.log JOB_NAME=exp_db_full. During the export operation, you detach from the job by using CTRL+C and then execute this command: Export> STOP_JOB=IMMEDIATE. Are you sure you wish to stop the job ([yes]/no): yes. Which two statements are true about the job?

  • A. It terminates.
  • B. It continues to run in the background.
  • C. You can reattach to it and monitor it.
  • D. You cannot monitor it.

Answer: A,C

Explanation:
A .False. STOP_JOB=IMMEDIATE halts the job, not backgrounds it.
B .False. You can monitor before stopping or after restarting.
C .True. Before stopping, you can reattach with expdp attach=exp_db_full.
D .True. STOP_JOB=IMMEDIATE terminates the job instantly.


NEW QUESTION # 94
You execute this command: CREATE BIGFILE TABLESPACE big_tbs DATAFILE '/u01/oracle/data/big_f1.dbf' SIZE 20G; Sufficient storage is available in filesystem /u01. Which two statements are true about the BIG_TBS tablespace?

  • A. AUTOEXTEND is possible for the datafile.
  • B. It will always have a 32K blocksize.
  • C. It must be bigger than the largest SMALLFILE tablespace.
  • D. It will be a dictionary-managed tablespace by default.
  • E. Additional data files may not be added.

Answer: A,E

Explanation:
A .False. LMT is default in 23ai.
B .True. Bigfile tablespaces have one data file only.
C .True. AUTOEXTEND works with bigfile data files.
D .False. Block size defaults to DB_BLOCK_SIZE (e.g., 8K).
E .False. No size comparison requirement.


NEW QUESTION # 95
......

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