1Z1-182 PASS EXAM & EXAM 1Z1-182 LABS

1Z1-182 Pass Exam & Exam 1Z1-182 Labs

1Z1-182 Pass Exam & Exam 1Z1-182 Labs

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Oracle Database 23ai Administration Associate Sample Questions (Q79-Q84):

NEW QUESTION # 79
Which three tasks are performed by background processes in an Oracle database instance?

  • A. Reading database blocks into the buffer cache.
  • B. Reading database blocks into the buffer cache.
  • C. Writing redo to log files.
  • D. Writing dirty database block images from the buffer cache.
  • E. Registering services with Oracle Net listeners.
  • F. Creating dedicated server connections.

Answer: C,D,E

Explanation:
False. Server processes (foreground) read blocks into the buffer cache during user queries, not background processes.
Explanation:
Background processes manage core database operations. Let's break it down:
A : Creating dedicated server connections.
False. Dedicated server connections are created by the listener, not background processes. The listener hands off the connection to a server process (e.g., ora_s000), which isn't a background process.
B : Registering services with Oracle Net listeners.
True. The LREG process (Listener Registration, formerly PMON's role) registers services with listeners, using parameters like LOCAL_LISTENER.
Mechanics:LREG sends service details (e.g., orcl) to the listener every 60 seconds or on startup.
C : Writing redo to log files.
True. The LGWR (Log Writer) process writes redo entries from the redo log buffer to online redo log files, ensuring transaction durability.
Mechanics:Triggered by commits, log buffer fills, or checkpoints.
D : Writing dirty database block images from the buffer cache.
True. The DBWn (Database Writer) processes write modified (dirty) blocks from the buffer cache to data files, maintaining consistency.
Mechanics:Occurs at checkpoints or when free buffers are needed.


NEW QUESTION # 80
In which two ways would you disable timing information collected for wait events and much of the performance monitoring capability of the database?

  • A. By executing the PL/SQL procedure DBMS_TIME_STATISTIC.DISABLE(TRUE).
  • B. By setting the TIMED_STATISTICS system parameter to FALSE.
  • C. By setting the STATISTICS_LEVEL parameter to BASIC.
  • D. By executing the PL/SQL procedure DBMS_TIME_STATISTIC.LEVEL(BASIC).
  • E. By setting the TIMED_STATISTICS_LEVEL system parameter to FALSE.

Answer: B,C

Explanation:
A .True. TIMED_STATISTICS = FALSE disables timing data collection.
B .False. No such procedure exists.
C .False. No TIMED_STATISTICS_LEVEL parameter exists.
D .True. STATISTICS_LEVEL = BASIC disables most performance monitoring.
E .False. No such procedure exists.


NEW QUESTION # 81
Examine this command: ALTER DATABASE MOVE DATAFILE 'u01/sales1.dbf' TO 'u01/sales01.dbf' REUSE; Which two statements are true?

  • A. The file is renamed and stored in the same location.
  • B. DML may be performed on tables with one or more extents in this data file during the execution of this command.
  • C. The tablespace containing SALES1.DBF must be altered READ ONLY before executing the command.
  • D. The tablespace containing SALES1.DBF must be altered OFFLINE before executing the command.
  • E. If Oracle Managed Files (OMF) is used, then the file is renamed but moved to DB_CREATE_FILE_DEST.

Answer: A,B

Explanation:
This command moves/renames a data file online. Let's evaluate:
A . DML may be performed on tables with one or more extents in this data file during the execution of this command.
True. Introduced in 12c and refined in 23ai, MOVE DATAFILE is an online operation, allowing DML (e.g., INSERT, UPDATE) on tables within the file. Oracle ensures consistency via redo and undo.
Mechanics:The file is copied to the new location/name while tracking changes, then switched atomically.
Practical Use:Minimizes downtime in production systems.
B . If Oracle Managed Files (OMF) is used, then the file is renamed but moved to DB_CREATE_FILE_DEST.
False. With OMF, omitting the TO clause would place the file in DB_CREATE_FILE_DEST, but here, TO 'u01/sales01.dbf' explicitly specifies the target, overriding OMF defaults.
Mechanics:OMF only applies if the destination is unspecified (e.g., MOVE DATAFILE ... without TO).
Why Incorrect:Explicit path trumps OMF behavior.
C . The tablespace containing SALES1.DBF must be altered READ ONLY before executing the command.
False. READ ONLY isn't required; the operation is online and supports active use.
Why Incorrect:Conflicts with Oracle's online move feature.
D . The file is renamed and stored in the same location.
True. The command renames /u01/sales1.dbf to /u01/sales01.dbf (correcting u01 to /u01 as a Windows/Unix typo), keeping it in /u01/. REUSE allows overwriting if sales01.dbf exists.
Mechanics:File is copied and renamed in-place within the same filesystem directory.
E . The tablespace containing SALES1.DBF must be altered OFFLINE before executing the command.
False. Offline mode isn't needed; the online move handles activetablespaces.


NEW QUESTION # 82
Which three Oracle database space management features will work with both Dictionary and Locally managed tablespaces?

  • A. Oracle Managed Files (OMF).
  • B. Automatic data file extension (AUTOEXTEND).
  • C. Online table segment shrink.
  • D. Online index segment shrink.
  • E. Capacity planning growth reports based on historical data in the Automatic Workload Repository (AWR).

Answer: A,B,E

Explanation:
Dictionary-managed tablespaces (DMTs) use the data dictionary for extent management, whilelocally managed tablespaces (LMTs) use bitmaps. Let's evaluate compatibility:
A . Capacity planning growth reports based on historical data in the Automatic Workload Repository (AWR).
True. AWR tracks space usage (e.g., DBA_HIST_TBSPC_SPACE_USAGE) regardless of tablespace type, enabling growth reports for both DMTs and LMTs.
Mechanics:MMON collects metrics like segment growth, stored in SYSAUX, accessible via EM or scripts.
Practical Use:Helps predict when to add data files, universal across management types.
B . Online table segment shrink.
False. ALTER TABLE ... SHRINK SPACE requires LMTs with Automatic Segment Space Management (ASSM), unavailable in DMTs, which lack bitmap-based free space tracking.
Why Incorrect:DMTs use freelists, incompatible with shrink operations.
C . Online index segment shrink.
False. Like tables, ALTER INDEX ... SHRINK SPACE requires LMTs with ASSM, not supported in DMTs.
Why Incorrect:Same limitation as B; DMTs can't compact online.
D . Oracle Managed Files (OMF).
True. OMF automates file naming and placement (via DB_CREATE_FILE_DEST) for both DMTs and LMTs, agnostic to extent management.
Mechanics:Example: CREATE TABLESPACE ts1; creates an OMF file in either type.
Edge Case:DMTs are rare in 23ai, but OMF still applies.
E . Automatic data file extension (AUTOEXTEND).
True. AUTOEXTEND ON allows data files to grow as needed, supported in both DMTs and LMTs since early versions.
Mechanics:ALTER DATABASE DATAFILE ... AUTOEXTEND ON NEXT 100M; works universally.


NEW QUESTION # 83
You must create a tablespace of nonstandard block size in a new file system and plan to use this command: CREATE TABLESPACE ns_tbs DATAFILE '/u02/oracle/data/nstbs_f01.dbf' SIZE 100G BLOCKSIZE 32K; The standard block size is 8K, but other nonstandard block sizes will also be used. Which two are requirements for this command to succeed?

  • A. DB_32K_CACHE_SIZE must be less than DB_CACHE_SIZE.
  • B. The /u02 file system must have at least 100G space for the datafile.
  • C. DB_32K_CACHE_SIZE must be set to a value that can be accommodated in the SGA.
  • D. The operating system must use a 32K block size.
  • E. DB_32K_CACHE_SIZE should be set to a value greater than DB_CACHE_SIZE.

Answer: B,C

Explanation:
A .False. No such restriction exists; DB_32K_CACHE_SIZE is independent of DB_CACHE_SIZE.
B .True. A nonstandard block size (32K) requires a corresponding cache (DB_32K_CACHE_SIZE) set to a non-zero value within SGA limits.
C .False. OS block size is irrelevant; Oracle manages its own block sizes.
D .False. No requirement for it to exceed DB_CACHE_SIZE.
E .True. The file system must have 100G available for the datafile.


NEW QUESTION # 84
......

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