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Oracle Database 23ai Administration Associate Questions and Answers

Question 1

Which three tasks are performed by background processes in an Oracle database instance?

Options:

Creating dedicated server connections.

Registering services with Oracle Net listeners.

Writing redo to log files.

Writing dirty database block images from the buffer cache.

Reading database blocks into the buffer cache.

Question 2

You want to apply the principle of Least Privilege in all your live databases. One of your requirements is to revoke unnecessary privileges from all users who have them using Privilege Analysis. Which three types of analyses can be done using the DBMS_PRIVILEGE_CAPTURE package?

Options:

Analysis of privileges that a user has on their own schema objects that they did not use.

Analysis of all privileges used by all users including administrative users in the database.

Analysis of all privileges used by all users but excluding administrative users in the database.

Analysis of privileges granted directly to a role that are then used by a user who has been granted that role.

Analysis of privileges granted indirectly to a role that are then used by a user who has beengranted that role.

Analysis of privileges that a user has on their own schema objects that they did use.

Question 3

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

Options:

DML may be performed on tables with one or more extents in this data file during the execution of this command.

If Oracle Managed Files (OMF) is used, then the file is renamed but moved to DB_CREATE_FILE_DEST.

The tablespace containing SALES1.DBF must be altered READ ONLY before executing the command.

The file is renamed and stored in the same location.

The tablespace containing SALES1.DBF must be altered OFFLINE before executing the command.

Question 4

You start your database instance in NOMOUNT state. Which two actions are performed?

Options:

All required background processes are started.

The consistency of the database is checked.

The control files are opened.

Memory is allocated for the SGA.

SYS can access the database.

Question 5

One of your database instances was shut down normally and then started in NOMOUNT state. You then executed this command: ALTER DATABASE MOUNT; Which two of these actions are performed?

Options:

Online data files are opened.

Online redo logs are opened.

The initialization parameter file is read.

Oracle shared memory structures are allocated.

The alert log has instance startup details written to it.

Control files are read.

Question 6

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

Options:

Automatic capture of statistical information from the SGA and storing it in the AWR using Automatic Database Diagnostic.

ADDM, a server-based expert that reviews database performance statistics captured by Snapshots to identify potential problems before system performance degrades noticeably.

Automatic Diagnostic Collector used to capture and store database errors and hung analysis.

Automatic population of performance views (V$ views) from statistical data stored in AWR repository and using Automatic Database Diagnostic.

Automatic Application Tracing used to collect High-Load SQL statements and statistics.

Answer:

A, B

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.

Explanation: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.

Explanation: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.

Explanation: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.

Explanation: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.

E. Automatic Application Tracing used to collect High-Load SQL statements and statistics.

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.

[References:Oracle Database Performance Tuning Guide 23ai, "Automatic Workload Repository"; Oracle Database Concepts 23ai, "ADDM.", , ]

Question 7

Which two statements are true about trace files produced by the Oracle Database server?

Options:

All trace files contain error information that requires contacting Oracle Support.

They can be written by server processes to a file system.

They can be written by background processes to a file system.

Trace file names are based on the database name concatenated with a sequential number.

They can be written by server processes to the Fast Recovery Area (FRA).

Question 8

Which three statements are true about Deferred Segment Creation in Oracle databases?

Options:

It is supported for Index Organized Tables (IOTs) contained in locally managed tablespaces.

It is supported for SYS-owned tables contained in locally managed tablespaces.

It is the default behavior for tables and indexes.

Indexes inherit the DEFERRED or IMMEDIATE segment creation attribute from their parent table.

Sessions may dynamically switch back and forth from DEFERRED to IMMEDIATE segment creation.

Question 9

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

Options:

By setting the TIMED_STATISTICS system parameter to FALSE.

By executing the PL/SQL procedure DBMS_TIME_STATISTIC.DISABLE(TRUE).

By setting the TIMED_STATISTICS_LEVEL system parameter to FALSE.

By setting the STATISTICS_LEVEL parameter to BASIC.

By executing the PL/SQL procedure DBMS_TIME_STATISTIC.LEVEL(BASIC).

Question 10

Your data center uses Oracle Managed Files (OMF) for all databases. All tablespaces are smallfile tablespaces. SALES_Q1 is a permanent user-defined tablespace in the SALES database. The following command is about to be issued by a DBA logged in to the SALES database: ALTER TABLESPACE sales_q1 ADD DATAFILE; Which two actions independently ensure that the command executes successfully?

Options:

Specify a path in the DATAFILE clause of the command specifying a location with at least 100 MB of available space.

Add the AUTOEXTEND ON clause with NEXT set to 100M.

Ensure that DB_RECOVERY_FILE_DEST and DB_CREATE_FILE_DEST each specify locations with at least 50 MB of available space.

Ensure that DB_CREATE_FILE_DEST specifies a location with at least 100 MB of available space.

Ensure that DB_RECOVERY_FILE_DEST and DB_CREATE_FILE_DEST each specify locations with at least 50 MB of available space.

Question 11

As the DBA, you execute this command: GRANT CREATE VIEW TO usr1 WITH ADMIN OPTION; USR1 then executes: GRANT CREATE VIEW TO usr2 WITH ADMIN OPTION; USR2 then executes: GRANT CREATE VIEW TO usr3; Which statement is true?

Options:

When the DBA revokes the CREATE VIEW privilege from USR1, it is revoked from USR2 but not USR3.

When the DBA revokes the CREATE VIEW privilege from USR2, it is revoked from USR3.

The DBA can revoke only ADMIN OPTION from USR1.

USR1 can revoke the CREATE VIEW privilege from USR3.

When the DBA revokes the CREATE VIEW privilege from USR1, it is neither revoked from USR2 nor USR3.

Question 12

Which two statements are true about the tools used to configure Oracle Net Services?

Options:

The lsnrctl utility requires a listener.ora file to exist before it is started.

Enterprise Manager Cloud Control can be used to centrally configure net service names for any database server target.

The Oracle Net Configuration Assistant is only used when running the Oracle installer.

Oracle Net Manager can be used to locally configure naming methods on a database server.

Oracle Net Manager can be used to centrally configure listeners on any database server target.

Question 13

You are going to perform a hot remote clone of PDB1 from CDB1 as TESTPDB in CDB2. Which of the following is a necessary prerequisite for the hot remote clone?

Options:

PDB1 must be taken offline before the cloning process begins.

Both CDBs need to be in local undo mode.

PDB1 must be in read-only mode.

TESTPDB must be in read-only mode after the cloning process is complete.

Question 14

Which three statements are true about Automatic Diagnostic Repository (ADR)?

Options:

It is a file-based repository held outside any database.

It is only used for Oracle database diagnostic information.

It is held inside an Oracle database schema.

It can be used for the problem diagnosis of a database when that database’s instance is down.

The ADR base is specified in the DIAGNOSTIC_DEST database parameter.

Question 15

Which three statements are true about roles?

Options:

Roles must be password protected.

Roles may be granted to other roles.

The SET ROLE statement can enable one or more roles for a session.

Object privileges may not be granted to roles.

All roles granted to a user are set on default when the user logs in.

The SET ROLE statement can disable one or more roles for a session.

Answer:

B, C, F

Explanation:

Roles in Oracle manage privileges efficiently. Let’s dive into each option:

A. Roles must be password protected.

Explanation:False. Roles can be password-protected (e.g., CREATE ROLE mgr IDENTIFIED BY secret), but it’s optional. Non-protected roles (default) are enabled automatically if granted, requiring no password.

Mechanics:Password-protected roles need SET ROLE mgr IDENTIFIED BY secret, enhancing security for sensitive privileges.

B. Roles may be granted to other roles.

Explanation:True. Roles can form hierarchies (e.g., GRANT clerk TO mgr), allowing nested privilege management.

Mechanics:A user with mgr inherits clerk privileges indirectly. Revoking clerk from mgr cascades appropriately.

Practical Use:Simplifies complex privilege structures in large organizations.

C. The SET ROLE statement can enable one or more roles for a session.

Explanation:True. SET ROLE role1, role2; activates specified roles for the session, assuming they’re granted and not password-protected (or password is provided).

Mechanics:Enabled roles grant their privileges immediately within the session scope.

D. Object privileges may not be granted to roles.

Explanation:False. Object privileges (e.g., GRANT SELECT ON emp TO clerk) are a primary use of roles, making this statement incorrect.

Why Incorrect:Roles are designed for this purpose, contradicting the option.

E. All roles granted to a user are set on default when the user logs in.

Explanation:False. Only roles marked as DEFAULT ROLE (via ALTER USER ... DEFAULT ROLE role1) are enabled at login. Non-default roles require SET ROLE.

Mechanics:Check via SELECT * FROM DBA_ROLE_PRIVS WHERE DEFAULT_ROLE='YES'.

F. The SET ROLE statement can disable one or more roles for a session.

Explanation:True. SET ROLE NONE disables all roles, or SET ROLE role1 implicitly disables others not listed, providing granular control.

Practical Use:Useful for testing or restricting privileges temporarily.

[References:Oracle Database Security Guide 23ai, "Managing Roles"; Oracle Database SQL Language Reference 23ai, "SET ROLE.", , ]

Question 16

Examine this command: SQL> ALTER TABLE ORDERS SHRINK SPACE COMPACT; Which two statements are true?

Options:

Dependent indexes become UNUSABLE.

The SHRINK operation causes rows to be moved to empty space starting toward the end of the ORDERS segment.

Only queries are allowed on ORDERS while SHRINK is executing.

The high-water mark (HWM) of ORDERS is adjusted.

Queries and DML statements are allowed on ORDERS while the SHRINK is executing.

The SHRINK operation causes rows to be moved to empty space starting from the beginning of the ORDERS segment.

Question 17

Which three statements are true about UNDO and REDO?

Options:

REDO is used for read consistency.

UNDO is used for some flashback operations.

UNDO is used for read consistency.

Both REDO and UNDO can be multiplexed.

REDO is used for ROLLBACK.

REDO is used for instance recovery.

Question 18

What is the result of the following command? ALTER PLUGGABLE DATABASE PDB1 DISCARD STATE;

Options:

It is unnecessary if the PDB is in the process of being upgraded.

PDB1 is reverted to its default properties, which includes not to automatically open after a CDB restart.

PDB1 is reverted to its default properties, which includes automatic opening after a CDB restart.

It should be used whenever PDB1 open mode needs to be changed.

Question 19

Which two are benefits of external tables?

Options:

They support DELETEs, which transparently deletes records in the file system as if they were table rows.

They can be queried while the database is in the MOUNT state like dynamic performance views.

They support UPDATEs, which transparently updates records in the file system as if they were table rows.

They can be queried, transformed, and joined with other tables without having to load the data first.

The results of a complex join or aggregating function or both can be unloaded to a file for transportation to other systems.

Question 20

You execute this command: CREATE SMALLFILE TABLESPACE sales DATAFILE '/u01/app/oracle/sales01.dbf' SIZE 5G SEGMENT SPACE MANAGEMENT AUTO; Which two statements are true about the SALES tablespace?

Options:

Free space is managed using freelists.

It uses the database default block size.

It must be smaller than the smallest BIGFILE tablespace.

It is a locally managed tablespace.

Any data files added to the tablespace must have a size of 5 gigabytes.

Question 21

Which three statements are true about using SQL*Plus?

Options:

It can run scripts passed to it by a shell script.

It can run Recovery Manager (RMAN) commands.

It must be downloaded from the Oracle Technology Network (OTN).

It has both command-line and graphical user interfaces (GUI).

It can run scripts entered at the SQL prompt.

It has its own commands that are separate from any SQL statements.

Question 22

Which data dictionary view describes the data sources of external tables?

Options:

DBA_ALL_USER_EXTERNAL_LOCATIONS

DBA_ALL_USER_TAB_COLUMNS

DBA_ALL_USER_EXTERNAL_TABLES

DBA_ALL_USER_TABLES

Question 23

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?

Options:

DB_32K_CACHE_SIZE must be less than DB_CACHE_SIZE.

DB_32K_CACHE_SIZE must be set to a value that can be accommodated in the SGA.

The operating system must use a 32K block size.

DB_32K_CACHE_SIZE should be set to a value greater than DB_CACHE_SIZE.

The /u02 file system must have at least 100G space for the datafile.

Question 24

What are the three components of Oracle Database Automatic Maintenance Tasks?

Options:

A diagnostic system that collects database error logs and details about database failures that can be found to diagnose complete file.

Oracle Database Resource Manager, which enables you to manage and configure system resources used by the Automatic Maintenance Tasks.

The maintenance windows managed by Oracle Database Scheduler, which are predefined time intervals permitting scheduled tasks.

A packaging system that allows you to combine all error and failure logs to share with Oracle Support.

A database alert log that stores details about major database operations and errors, which is used to manage cluster performance.

A set of tasks that are started automatically at regular intervals to perform maintenance operations on the database.

Question 25

Which two statements are true about database instances and Real Application Clusters (RAC)?

Options:

A RAC database must have two or more instances.

A RAC database can have one instance.

A RAC database must have three or more instances.

A RAC database can have instances on separate servers.

Two RAC databases can share their instances.

Question 26

How do you validate that the database was migrated to Unified Auditing?

Options:

By querying V$OPTION for parameter Unified Auditing.

By using the LSINVENTORY Command to query the Oracle Database Software Library.

By querying the DBA_UNIFIED_AUDIT_OPTION view.

By executing DBMS_AUDIT_MGMT PL/SQL package in Verify mode.

Question 27

Which statement regarding PDBs (Pluggable Databases) is correct?

Options:

You can drop a PDB as long as it is not the PDB seed.

You cannot drop a source PDB of a refreshable PDB.

You can drop an application root along with the associated PDBs.

When the relocation of a PDB is finished, the source PDB must be dropped.

Question 28

In one of your databases, you create a user, HR, and then execute this command: GRANT CREATE SESSION TO hr WITH ADMIN OPTION; Which three actions can HR perform?

Options:

Execute DML statements in the HR schema.

Revoke the CREATE SESSION privilege from other users.

Grant the CREATE SESSION privilege with ADMIN OPTION to other users.

Revoke the CREATE SESSION privilege from user HR.

Execute DDL statements in the HR schema.

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Oracle 1z0-182 Oracle Database 23ai Administration Associate Exam Practice Test

Oracle Database 23ai Administration Associate Questions and Answers

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