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Oracle Database 23ai Administration Associate Sample Questions (Q10-Q15):

NEW QUESTION # 10
Which two statements are true about the configuration and use of UNDO?

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

Answer: B,E

NEW QUESTION # 11
Which two statements are true concerning logical and physical database structures?

A. A segment can span multiple data files in some tablespaces.
B. All tablespaces may have one or more data files.
C. A segment's blocks can be of different sizes.
D. Segments can span multiple tablespaces.
E. A segment's blocks can be of different sizes.
F. A segment might have only one extent.

Answer: A,F

Explanation:
False. All blocks in a segment use the tablespace's block size (e.g., 8KB). While a database can have tablespaces with different block sizes (e.g., 8KB, 32KB), a single segment's blocks are uniform, as it resides in one tablespace.
Explanation:
Logical structures (e.g., segments, extents) map to physical structures (e.g., data files, blocks). Let's dissect each option:
A : A segment can span multiple data files in some tablespaces.
True. A segment (e.g., a table or index) is a logical entity stored in a tablespace. In a smallfile tablespace (default in Oracle), a segment's extents can span multiple data files if the tablespace has multiple files and space allocation requires it. This is common in large tables or when autoextend adds new files.
Mechanics:Oracle allocates extents across available data files in a round-robin fashion (with ASSM) or as needed, ensuring the segment's data is distributed. This doesn't apply to bigfile tablespaces, which use a single data file.
Example:A 10GB table in a tablespace with two 5GB data files will span both.
B : Segments can span multiple tablespaces.
False. A segment is confined to a single tablespace. Oracle enforces this to maintain logical separation (e.g., a table's data stays in its assigned tablespace). Partitioned tables can have partitions in different tablespaces, but each partition is a separate segment.
Why Not:The segment header and extent map reside in one tablespace, preventing cross-tablespace spanning for a single segment.
C : A segment might have only one extent.
True. A segment starts with one extent upon creation (e.g., a small table or index). If no further growth occurs, it remains a single-extent segment. This is common with small objects or when INITIAL extent size suffices.
Mechanics:In locally managed tablespaces (default), the initial extent is allocated based on INITIAL or tablespace defaults (e.g., 64KB), and additional extents are added only as needed.
D : All tablespaces may have one or more data files.
False. Bigfile tablespaces are restricted to one data file (up to 128TB). Smallfile tablespaces (traditional) can have multiple data files (up to 1022), but the "all" phrasing makes this false due to bigfile exceptions.
Clarification:The question's intent may assume smallfile tablespaces, but Oracle 23ai supports both types.

NEW QUESTION # 12
Which two AWR-based tools listed below are part of Oracle Database self-tuning components?

A. Automatic capture of statistical information from the SGA and storing it in the AWR using Automatic Database Diagnostic.
B. ADDM, a server-based expert that reviews database performance statistics captured by Snapshots to identify potential problems before system performance degrades noticeably.
C. Automatic population of performance views (V$ views) from statistical data stored in AWR repository and using Automatic Database Diagnostic.
D. Automatic Diagnostic Collector used to capture and store database errors and hung analysis.
E. Automatic Application Tracing used to collect High-Load SQL statements and statistics.
F. Automatic Application Tracing used to collect High-Load SQL statements and statistics.

Answer: A,B

Explanation:
False. No "Automatic Application Tracing" exists as an AWR tool. SQL tracing (e.g., DBMS_MONITOR) is manual, and high-load SQL is captured by AWR indirectly via V$SQL snapshots, not a distinct tracing tool.
Why Incorrect:Conflates manual tracing with AWR's passive collection.
Explanation:
The Automatic Workload Repository (AWR) is a cornerstone of Oracle's self-tuning capabilities, collecting and storing performance statistics for analysis. Let's dissect each option:
A : Automatic capture of statistical information from the SGA and storing it in the AWR using Automatic Database Diagnostic.
True. AWR automatically captures statistics (e.g., wait events, SQL stats) from the System Global Area (SGA) via the MMON (Manageability Monitor) process, storing them in the AWR repository (in SYSAUX). This is part of the Automatic Database Diagnostic Monitor (ADDM) framework, though "Automatic Database Diagnostic" likely refers to this broader mechanism.
Mechanics:Snapshots are taken hourly by default (configurable via DBMS_WORKLOAD_REPOSITORY.MODIFY_SNAPSHOT_SETTINGS), persisting data like DBA_HIST_SYSSTAT for self-tuning analysis.
Practical Use:Enables historical performance tracking, feeding tools like ADDM and SQL Tuning Advisor.
Edge Case:If STATISTICS_LEVEL=BASIC, AWR collection is disabled, haltingself-tuning.
Historical Note:Introduced in 10g, enhanced in 23ai for finer granularity.
B : ADDM, a server-based expert that reviews database performance statistics captured by Snapshots to identify potential problems before system performance degrades noticeably.
True. The Automatic Database Diagnostic Monitor (ADDM) analyzes AWR snapshots to proactively detect issues (e.g., high CPU usage, I/O bottlenecks) and recommend fixes. It runs automatically after each snapshot in maintenance windows.
Mechanics:ADDM uses DBA_ADVISOR_FINDINGS to log issues, leveraging AWR data like DBA_HIST_SQLSTAT. Example: It might suggest adding an index for a slow query.
Practical Use:Prevents performance degradation in production systems by catching trends early.
Edge Case:Limited by snapshot frequency; real-time issues may need manual intervention.
C : Automatic Diagnostic Collector used to capture and store database errors and hung analysis.
False. No such tool exists as an "Automatic Diagnostic Collector" in AWR context. This likely confuses the Incident Packaging Service (IPS) or ADR (Automatic Diagnostic Repository), which handles errors but isn't AWR-based or self-tuning.
Why Incorrect:ADR collects trace files and logs, not AWR statistics, and isn't part of self-tuning.
D : Automatic population of performance views (V$ views) from statistical data stored in AWR repository and using Automatic Database Diagnostic.
False. V$ views (e.g., V$SESSION) are real-time memory structures in the SGA, not populated from AWR, which is historical (e.g., DBA_HIST_*). AWR doesn't back-feed V$ views; the reverse occurs via snapshots.
Why Incorrect:Misunderstands the data flow; AWR is a sink, not a source for V$ views.

NEW QUESTION # 13
Which three functions are performed by dispatchers in a shared server configuration?

A. Writing inbound requests to the common request queue from all shared server connections.
B. Broadcasting shared server session responses back to requesters on all connections.
C. Sending shared server session responses back to requesters on the appropriate connection.
D. Receiving inbound requests from processes using shared server connections.
E. True. Dispatchers monitor the response queue.
F. Sending each connection input request to the appropriate shared server input queue.
G. Checking for outbound shared server responses on the common outbound response queue.

Answer: C,D,G

Explanation:
A :True. Dispatchers return responses to clients.
B :False. Dispatchers manage queues, not write directly.
C :False. Responses are connection-specific, not broadcast.
D :True. Dispatchers receive client requests.
E :False. Queues are common, not per-connection.

NEW QUESTION # 14
Which statement is true about database links?

A. Private database link creation requires the same user to exist in both the local and the remote databases.
B. A database link created in a database allows a connection from that database's instance to the target database's instance for selecting schema data.
C. A public database link can be used by any user allowing remote database instance connection for selecting schema data.
D. A public database link can be created only by SYS.
E. A database link can be created only between two Oracle databases.

Answer: B

Explanation:
A .False. Links can connect to non-Oracle DBs via gateways.
B .False. No such user requirement; authentication is separate.
C .False. Any user with CREATE PUBLIC DATABASE LINK can create one.
D .True. Links enable remote schema access (e.g., SELECT * FROM emp@remote).
E .False. Public links allow access, but privileges on remote objects are needed.

NEW QUESTION # 15
......

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Oracle 1Z0-182 Exam Tips - 1Z0-182 Exam Simulator Fee

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Oracle Database 23ai Administration Associate Sample Questions (Q10-Q15):

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