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NEW QUESTION # 28
Which three statements are true about a dedicated server configuration?
- A. A dedicated server process can be spawned without a listener when using local clients.
- B. A dedicated server process may be reused by a new session after the session using that process terminates.
- C. The DBA configures the maximum number of dedicated server processes that can share the samedispatcher process.
- D. A dedicated server process communicates directly with a client or middle-tier process once the session is established.
- E. A dedicated server process can be spawned by the listener when using local clients.
- F. Each dedicated server process has its own dispatcher process.
Answer: A,D,E
Explanation:
A .False. Dispatchers are for shared servers, not dedicated.
B .False. Dedicated processes die with the session.
C .True. Direct client-server communication occurs.
D .False. No dispatchers in dedicated mode.
E .True. Listener spawns for local/remote clients.
F .True. Local logins (e.g., sqlplus /) bypass the listener.
NEW QUESTION # 29
Which two statements are true about the configuration and use of UNDO?
- A. UNDO_RETENTION specifies for how long Oracle attempts to keep unexpired UNDO.
- B. Unexpired UNDO is always retained.
- C. UNDO_RETENTION specifies how long all types of UNDO are retained.
- D. UNDO_RETENTION specifies for how long Oracle attempts to keep expired and unconsumed UNDO.
- E. Active UNDO is always retained.
Answer: A,E
NEW QUESTION # 30
Which two tasks can you perform using DBCA for databases?
- A. Enable flashback database for an existing database.
- B. Change the standard block size of an existing database.
- C. Register a new database with an available Enterprise Manager Management server.
- D. Configure incremental backups for a new database.
- E. Configure a nonstandard block size for a new database.
Answer: C,E
Explanation:
A .False. Backups are configured via RMAN, not DBCA.
B .True. DBCA allows nonstandard block sizes during DB creation.
C .True. DBCA can register new DBs with EM.
D .False. Block size is fixed post-creation.
E .False. Flashback is enabled via SQL, not DBCA for existing DBs.
NEW QUESTION # 31
Which two statements are true about the tools used to configure Oracle Net Services?
- A. Oracle Net Manager can be used to centrally configure listeners on any database server target.
- B. The Oracle Net Configuration Assistant is only used when running the Oracle installer.
- C. The lsnrctl utility requires a listener.ora file to exist before it is started.
- D. Enterprise Manager Cloud Control can be used to centrally configure net service names for any database server target.
- E. Oracle Net Manager can be used to locally configure naming methods on a database server.
Answer: D,E
Explanation:
A .False. lsnrctl can start a default listener without listener.ora.
B .True. EMCC provides centralized Net Services configuration.
C .False. NetCA can run standalone, not just during installation.
D .True. Net Manager configures local naming (e.g., TNSNAMES.ORA).
E .False. Net Manager is local, not centralized like EMCC.
NEW QUESTION # 32
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. You can reattach to it and monitor it.
- C. You cannot monitor it.
- D. It continues to run in the background.
Answer: A,B
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 # 33
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?
- A. Add the AUTOEXTEND ON clause with NEXT set to 100M.
- B. Specify a path in the DATAFILE clause of the command specifying a location with at least 100 MB of available space.
- C. Ensure that DB_RECOVERY_FILE_DEST and DB_CREATE_FILE_DEST each specify locations with at least 50 MB of available space.
- D. Ensure that DB_CREATE_FILE_DEST specifies a location with at least 100 MB of available space.
- E. Ensure that DB_RECOVERY_FILE_DEST and DB_CREATE_FILE_DEST each specify locations with at least 50 MB of available space.
Answer: D,E
Explanation:
With OMF enabled, Oracle automatically manages file creation. The command ALTER TABLESPACE sales_q1 ADD DATAFILE without a file specification relies on initialization parameters:
A . Specify a path in the DATAFILE clause ... with at least 100 MB of available space.False. With OMF, explicitly specifying a path overrides OMF behavior, but it's not required for success if OMF parameters are set correctly.
B . Add the AUTOEXTEND ON clause with NEXT set to 100M.False. AUTOEXTEND is optional and affects file growth, not the initial creation success, which depends on available space in the OMF location.
C . Ensure that DB_RECOVERY_FILE_DEST and DB_CREATE_FILE_DEST each specify locations with at least 50 MB of available space.True. If both parameters are set,Oracle may use either for data files (depending on context), and sufficient space (e.g., 50 MB minimum for a smallfile) ensures success.
D . Ensure that DB_CREATE_FILE_DEST specifies a location with at least 100 MB of available space.True. This is the primary OMF parameter for data files; sufficient space (typically 100 MB minimum for a new file) guarantees the command succeeds.
E . Ensure that DB_RECOVERY_FILE_DEST and DB_CREATE_FILE_DEST each specify locations with at least 50 MB of available space.False. This is redundant with C; only one needs sufficient space, though C's phrasing makes it a valid independent action.
NEW QUESTION # 34
Examine this command: ALTER DATABASE MOVE DATAFILE '\u01/sales1.dbf' TO '\u01/sales01.dbf' REUSE; Which two statements are true?
- A. The tablespace containing SALES1.DBF must be altered READ ONLY before executing the command.
- 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 OFFLINE before executing the command.
- D. The file is renamed and stored in the same location.
- E. If Oracle Managed Files (OMF) is used, then the file is renamed but moved to DB_CREATE_FILE_DEST.
Answer: B,D
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 # 35
Which two tasks can be performed in the NOMOUNT state?
- A. Full database recovery.
- B. Renaming data files.
- C. Re-creating control files.
- D. Enabling online redo log archiving.
- E. Creating a database.
Answer: C,E
Explanation:
A .False. Requires MOUNT to access data files.
B .False. Requires MOUNT for redo logs.
C .True. CREATE DATABASE runs in NOMOUNT.
D .True. CREATE CONTROLFILE is possible.
E .False. Recovery needs MOUNT or OPEN.
NEW QUESTION # 36
Which two statements are true regarding Oracle database space management within blocks managed by Automatic Segment Space Management (ASSM)?
- A. ASSM assigns blocks to one of the four fullness categories based on what percentage of the block is allocated for rows.
- B. Insert operations always insert new rows into blocks with free space appropriate to the length of the row being inserted.
- C. PCTFREE defaults to 10% for all blocks in all segments for all compression methods.
- D. The first block with enough free space to accommodate a row being inserted will always be used for that row.
- E. Update operations always relocate rows into blocks with free space appropriate to the length of the row being updated.
Answer: A,B
Explanation:
A .True. ASSM categorizes blocks (e.g., 0-25%, 25-50%) for efficient space use.
B .False. Updates may cause chaining/migration, not always relocation.
C .True. ASSM optimizes inserts into suitable blocks.
D .False. ASSM uses a bitmap, not necessarily the first block.
E .False. PCTFREE is segment-specific, not universally 10%.
NEW QUESTION # 37
Which three statements are true about using SQL*Plus?
- A. It can run Recovery Manager (RMAN) commands.
- B. It must be downloaded from the Oracle Technology Network (OTN).
- C. It can run scripts passed to it by a shell script.
- D. It has both command-line and graphical user interfaces (GUI).
- E. It has its own commands that are separate from any SQL statements.
- F. It can run scripts entered at the SQL prompt.
Answer: C,E,F
Explanation:
A .True. sqlplus @script.sql works from shell scripts.
B .False. RMAN uses its own client, not SQL*Plus.
C .False. Bundled with Oracle DB software.
D .False. Command-line only; no GUI in 23ai.
E .True. @script runs scripts interactively.
F .True. Commands like SHOW PARAMETER are unique.
NEW QUESTION # 38
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. It will be a dictionary-managed tablespace by default.
- B. Additional data files may not be added.
- C. AUTOEXTEND is possible for the datafile.
- D. It will always have a 32K blocksize.
- E. It must be bigger than the largest SMALLFILE tablespace.
Answer: B,C
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 # 39
What are Optimizer Statistics?
- A. Optimizer Statistics are table, column, index, and system statistics used for generating efficient SQL execution plans.
- B. Optimizer Statistics are part of system performance statistics stored in AWR required for calculating SQL execution plans.
- C. Optimizer Statistics are a set of data distribution statistics collected in real time as data is inserted, deleted, or updated, which are stored in AWR and used for generating SQL execution plans.
- D. Optimizer Statistics are statistics about data distribution within Oracle Datafiles.
Answer: A
Explanation:
A .False. Not real-time; collected periodically.
B .False. Not about datafile distribution.
C .True. Includes table, column, index stats for plan generation.
D .False. Stored in data dictionary, not AWR.
NEW QUESTION # 40
Which three statements are true about Oracle Managed Files (OMF)?
- A. If DB_CREATE_ONLINE_LOG_DEST_1 is specified but DB_CREATE_FILE_DEST is not, new data files and temp files are stored in DB_CREATE_ONLINE_LOG_DEST_1 by default.
- B. If DB_CREATE_FILE_DEST is specified but DB_CREATE_ONLINE_LOG_DEST_n is not, new redo logs and control files are stored in DB_CREATE_FILE_DEST by default.
- C. If only DB_CREATE_ONLINE_LOG_DEST_1 is specified, only redo logs and control files are Oracle Managed.
- D. If DB_RECOVERY_FILE_DEST is specified but DB_CREATE_ONLINE_LOG_DEST_n is not, the redo logs and control files are placed in DB_RECOVERY_FILE_DEST by default.
- E. If DB_RECOVERY_FILE_DEST is specified, at least two different locations must be specified for DB_CREATE_ONLINE_LOG_DEST_n.
- F. If only DB_CREATE_FILE_DEST is specified, only data files and temp files are Oracle managed.
Answer: A,B,D
Explanation:
A .True. Without DB_CREATE_ONLINE_LOG_DEST_n, redo logs and control files default to DB_RECOVERY_FILE_DEST.
B .False. If only DB_CREATE_FILE_DEST is set, redo logs and control files also use it unless overridden.
C .True. DB_CREATE_ONLINE_LOG_DEST_1 becomes the default for data files and temp files if DB_CREATE_FILE_DEST is unset.
D .True. DB_CREATE_FILE_DEST serves as the default for all file types if no log-specific parameter is set.
E .False. Data files and temp files would also use DB_CREATE_ONLINE_LOG_DEST_1 if no other parameter is specified.
F .False. No such requirement exists; DB_RECOVERY_FILE_DEST operates independently.
NEW QUESTION # 41
Which three statements are true about resumable space allocation in Oracle databases?
- A. A user's session may be suspended even if the user has the UNLIMITED TABLESPACE system privilege.
- B. The AFTER SUSPEND event trigger can itself be suspended due to space conditions.
- C. Resumable space allocation may be enabled for some sessions and not others.
- D. Resumable space allocation is only possible with locally managed tablespaces.
- E. All sessions must have the same timeout value when waiting for resumable space allocations.
- F. A user's session may be suspended and resumed multiple times.
Answer: A,C,F
Explanation:
A .True. Enabled per session with ALTER SESSION ENABLE RESUMABLE.
B .True. Multiple suspensions can occur in one session.
C .False. Works with dictionary-managed tablespaces too.
D .False. Timeout is session-specific.
E .True. Privilege doesn't prevent suspension; quota limits do.
F .False. Triggers execute but can't suspend themselves.
NEW QUESTION # 42
Which statement is true about the PDB_DBA role granted to a local user during the creation of a new PDB?
- A. The role has the privileges to administer the PDB.
- B. No privileges are provided with the PDB_DBA role.
- C. The role has the privileges to create and manage users within the PDB.
- D. The role has the privileges to perform DDL operations on all local schema objects.
Answer: A
Explanation:
A .True. PDB_DBA grants admin rights (e.g., CREATE SESSION, ALTER SYSTEM) within the PDB.
B .False. DDL on objects requires ownership or explicit grants.
C .False. User management needs CREATE USER privilege, not inherent.
D .False. It includes multiple privileges, not none.
NEW QUESTION # 43
Which data dictionary view describes the data sources of external tables?
- A. DBA_ALL_USER_TAB_COLUMNS
- B. DBA_ALL_USER_EXTERNAL_LOCATIONS
- C. DBA_ALL_USER_EXTERNAL_TABLES
- D. DBA_ALL_USER_TABLES
Answer: B
Explanation:
A .True. DBA_EXTERNAL_LOCATIONS (or prefixed variants) shows external table data sources (e.g., file paths).
B-D .False. These views cover columns or tables but not external sources specifically.
NEW QUESTION # 44
Which two methods can be used to purge audit records of the Unified Audits?
- A. Only viewed audit records can be purged from Unified Audits.
- B. Use DBMS_AUDIT_MGMT.CLEAN_AUDIT_TRAIL as a privileged user to manually purge audit records.
- C. Use DBMS_AUDIT_MGMT.DELETE_AUDIT_RECORDS('POLICY_NAME') as a privileged user to manually purge audit records of a specified Unified Policy.
- D. Use DBMS_AUDIT_MGMT.CREATE_PURGE_JOB as a privileged user to schedule an automatic purge job.
- E. Only the owner of a Unified Audit Policy can purge audit records by resetting the policy.
- F. Use DBMS_AUDIT_MGMT.DELETE_AUDIT_RECORDS('POLICY_NAME') as a privileged user to manually purge audit records of a specified Unified Policy.
Answer: B,D
Explanation:
False. No such procedure exists in DBMS_AUDIT_MGMT. The package offers CLEAN_AUDIT_TRAIL and CREATE_PURGE_JOB, but nothing targets a specific policy's records by name in this format. You can filter records in UNIFIED_AUDIT_TRAIL by policy (e.g., SELECT * WHERE UNIFIED_AUDIT_POLICIES = 'POLICY_NAME'), but purging is all-or-nothing or time-based, not policy-specific via a single command.
Why Incorrect:This appears to be a fabricated or misinterpreted option, possibly confusing audit policy management with trail purging.
Explanation:
Unified Auditing in Oracle 23ai consolidates audit records into a single trail, managed via the DBMS_AUDIT_MGMT package. Let's evaluate each option with extensive detail:
A : Only viewed audit records can be purged from Unified Audits.
False. There's no concept of "viewed" audit records restricting purging. Unified Audit records (stored in UNIFIED_AUDIT_TRAIL) can be purged based on time, policy, or manual intervention, regardless of whether they've been viewed. This option misrepresents audit management capabilities.
Mechanics:Purging is controlled by retention policies or explicit commands, not view status. For example, records older than a set retention period (e.g., 90 days via DBMS_AUDIT_MGMT.SET_AUDIT_TRAIL_PROPERTY) are eligible for purging.
Why Incorrect:No Oracle documentation ties purging to viewing, making this a fabricated limitation.
B : Use DBMS_AUDIT_MGMT.CREATE_PURGE_JOB as a privileged user toschedule an automatic purge job.
True. This procedure creates a scheduled job to automatically purge audit records based on a retention policy or custom criteria. It's a standard method for ongoing audit trail maintenance, requiring privileges like AUDIT_ADMIN.
Mechanics:Example: BEGIN DBMS_AUDIT_MGMT.CREATE_PURGE_JOB(AUDIT_TRAIL_TYPE => DBMS_AUDIT_MGMT.AUDIT_TRAIL_UNIFIED, JOB_FREQUENCY => 'DAILY', JOB_STATUS => DBMS_AUDIT_MGMT.JOB_ENABLED); END;. This schedules daily purges of old records, using the retention period set by SET_AUDIT_TRAIL_PROPERTY.
Practical Use:Ideal for production environments to prevent the audit trail from growing indefinitely (e.g., avoiding tablespace exhaustion in SYSAUX).
Edge Case:If no retention period is set, the job purges nothing until configured, highlighting the need for prior setup.
C : Only the owner of a Unified Audit Policy can purge audit records by resetting the policy.
False. Audit policies don't have "owners" in the traditional sense; they're created by users with AUDIT_ADMIN and managed globally. Resetting or disabling a policy (e.g., NOAUDIT POLICY my_policy) stops auditing but doesn't purge existing records. Purging is a separate operation via DBMS_AUDIT_MGMT.
Why Incorrect:This conflates policy management with audit trail cleanup, which are distinct in Oracle.
D : Use DBMS_AUDIT_MGMT.CLEAN_AUDIT_TRAIL as a privileged user to manually purge audit records.
True. This procedure manually purges all Unified Audit records up to the current timestamp (or a specified time), requiring AUDIT_ADMIN privileges. It's a one-time cleanup tool.
Mechanics:Example: BEGIN DBMS_AUDIT_MGMT.CLEAN_AUDIT_TRAIL(AUDIT_TRAIL_TYPE => DBMS_AUDIT_MGMT.AUDIT_TRAIL_UNIFIED, USE_LAST_ARCH_TIMESTAMP => FALSE); END;. This clears the entire trail unless restricted by a timestamp.
Practical Use:Useful for immediate space reclamation or post-incident cleanup, unlike scheduled jobs.
Edge Case:If the audit trail is large, this may require significant undo space and time, potentially impacting performance.
NEW QUESTION # 45
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 server running the database to whose instance HR wishes to connect.
- B. It must resolve to a valid connect descriptor in the client's tnsnames.ora file.
- 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 be the name of the database to whose instance HR wishes to connect.
Answer: B
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 # 46
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 setting the STATISTICS_LEVEL parameter to BASIC.
- B. By executing the PL/SQL procedure DBMS_TIME_STATISTIC.LEVEL(BASIC).
- C. By setting the TIMED_STATISTICS_LEVEL system parameter to FALSE.
- D. By setting the TIMED_STATISTICS system parameter to FALSE.
- E. By executing the PL/SQL procedure DBMS_TIME_STATISTIC.DISABLE(TRUE).
Answer: A,D
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 # 47
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