1Z0-182 - Oracle Database 23ai Administration Associate Accurate Demo Test

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Oracle Database 23ai Administration Associate Sample Questions (Q91-Q96):

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

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

Answer: C,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
Which three tasks are part of the predefined Automated Maintenance Tasks?

A. Automatic segment and segment statistics advisor tasks.
B. Automatic notification tasks.
C. Automatic Optimizer Statistics Collection.
D. Automatic SQL Plan Management advisor tasks.
E. Automatic error and failure log collection tasks.
F. Automatic Backups of the database system files.

Answer: A,C,D

Explanation:
A .False. Backups are via RMAN, not AMTs.
B .True. Stats collection is an AMT.
C .False. Error logging isn't an AMT.
D .True. SPM tasks are included.
E .False. Notifications aren't AMTs.
F .True. Segment Advisor is an AMT.

NEW QUESTION # 93
In one of your databases, the user HR has the password HRMGR. You want to connect to a database instance whose listener listens on port 1531 by using this statement: CONNECT HR/HRMGR@orcl. No name server is used. Which statement is true about ORCL?

A. It must be the name of the database to whose instance HR wishes to connect.
B. It must be the name of the server running the database to whose instance HR wishes to connect.
C. It must be the value of the SERVICE_NAMES parameter on the client side.
D. It must resolve to a valid connect descriptor in the server's tnsnames.ora file.
E. It must resolve to a valid connect descriptor in the client's tnsnames.ora file.

Answer: E

Explanation:
A .False. ORCL is a TNS alias, not necessarily the DB name.
B .True. Must map to a connect descriptor (e.g., HOST=... PORT=1531) in tnsnames.ora.
C .False. It's not the server name but a network alias.
D .False. Client-side tnsnames.ora is used, not server-side.
E .False. SERVICE_NAMES is server-side, not client-side.

NEW QUESTION # 94
Which two statements are true about the Automatic Diagnostic Repository (ADR)?

A. The ADR base defaults to $ORACLE_HOME/rdbms/admin if neither DIAGNOSTIC_DEST nor ORACLE_BASE is set.
B. It is held inside an Oracle database schema.
C. It supports diagnostics for Oracle Clusterware.
D. It supports diagnostics for Automatic Storage Management (ASM).
E. The ADR base defaults to $ORACLE_HOME/dbs if the DIAGNOSTIC_DEST parameter and the ORACLE_BASE environment variable are not set.

Answer: C,D

Explanation:
A .False. ADR is file-based, not in a schema.
B .False. No such default exists.
C .True. ADR logs ASM diagnostics.
D .True. Supports Clusterware diagnostics.
E .False. Defaults to $ORACLE_BASE or /u01/app/oracle if unset.

NEW QUESTION # 95
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 appends data from EMP.DAT to EMP.
B. It overwrites the data for Alan and adds data for Curl and Bob.
C. It generates a SQL script that it uses to load data from EMP.DAT to EMP.
D. It overwrites all data in EMP with data from EMP.DAT.
E. It generates a log that contains control file entries, which can be used with normal SQL*Loader operations.

Answer: A,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 # 96
......

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1Z0-182 - Oracle Database 23ai Administration Associate Accurate Demo Test

1Z0-182 Real Questions Effective to Pass Oracle Exam

Oracle Database 23ai Administration Associate Sample Questions (Q91-Q96):

New Demo 1Z0-182 Test Pass Certify | Pass-Sure 1Z0-182 Exam Questions Answers: Oracle Database 23ai Administration Associate

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