Oracle 1z0-182 Exam With Confidence Using Practice Dumps

A.True. After ALTER PLUGGABLE DATABASE ... UNPLUG, CDB_PDBS.STATUS shows UNPLUGGED.

B.False. UNAVAILABLE isn’t a valid status here.

C.False. REMOVED isn’t used; UNPLUGGED persists until dropped.

D.False. DISABLED isn’t a PDB state in this context.

Background processes manage core database operations. Let’s break it down:

A. Creating dedicated server connections.

Explanation: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.

Explanation: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.

Explanation: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.

Explanation: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.

E. Reading database blocks into the buffer cache.

Explanation:False. Server processes (foreground) read blocks into the buffer cache during user queries, not background processes.

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.

Explanation: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.

Explanation: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.

Explanation: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.

Explanation: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.

E. Use DBMS_AUDIT_MGMT.DELETE_AUDIT_RECORDS('POLICY_NAME') as a privileged user to manually purge audit records of a specified Unified Policy.

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.