Oracle 1Z0-182 Exam Dumps

A .True. Any PDB except PDB$SEED can be dropped.

B .False. Source PDBs of refreshable clones can be dropped after cloning.

C .False. Dropping an application root requires explicit handling of PDBs.

D .False. Relocation doesn't mandate dropping the source PDB.

A .False. Diagnostic collection is ADR, not AMT.

B .True. Resource Manager allocates resources to AMTs.

C .True. Scheduler defines maintenance windows.

D .False. Packaging is IPS/ADR, not AMT.

E .False. Alert log is separate from AMTs.

F .True. Tasks like stats collection are AMTs.

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.

Unified Auditing is enabled at database creation or migration in 23ai. Let's analyze:

A . By querying V$OPTION for parameter Unified Auditing.

True. SELECT VALUE FROM V$OPTION WHERE PARAMETER = 'Unified Auditing'; returns TRUE if enabled. It's the definitive way to confirm Unified Auditing is active at the database level.

Mechanics:V$OPTION reflects compiled-in features; TRUE indicates the binary was linked with Unified Auditing (uniauflt=on during relink).

Practical Use:Quick, reliable check post-migration or upgrade.

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

False. LSINVENTORY (from OPatch) lists installed software components, not runtime features like auditing mode.

C . By querying the DBA_UNIFIED_AUDIT_OPTION view.

False. This view doesn't exist; DBA_AUDIT_POLICIES or UNIFIED_AUDIT_TRAIL show policies and records but not migration status.

D . By executing DBMS_AUDIT_MGMT PL/SQL package in Verify mode.

False. No ''Verify mode'' exists in DBMS_AUDIT_MGMT; it manages audit trails, not migration validation.

Database links enable cross-database queries in Oracle. Let's analyze each option with extensive detail:

A . A public database link can be created only by SYS.

False. Any user with the CREATE PUBLIC DATABASE LINK privilege (not just SYS) can create a public link (e.g., CREATE PUBLIC DATABASE LINK remote_db CONNECT TO scott IDENTIFIED BY tiger USING 'orcl'). While SYS typically has this privilege, it's not exclusive to SYS.

Mechanics:Privilege is granted via GRANT CREATE PUBLIC DATABASE LINK TO user;. Public links are accessible to all users in the local DB.

Why Incorrect:Overly restrictive; Oracle's security model allows delegation.

B . A database link can be created only between two Oracle databases.

False. Database links can connect to non-Oracle databases using Oracle Heterogeneous Services or gateways (e.g., ODBC or JDBC drivers), such as linking to SQL Server. Example: CREATE DATABASE LINK mssql_link USING 'hsodbc';.

Mechanics:Requires configuration of hs_ parameters in init.ora and a gateway listener.

Historical Note:Heterogeneous links were introduced in 8i, expanded in 23ai for cloud integration.

C . A database link created in a database allows a connection from that database's instance to the target database's instance, but not vice versa.

True. A database link is unidirectional; it enables queries from the local instance to the remote instance (e.g., SELECT * FROM emp@remote_db), but the remote instance can't use it to query back unless a separate link is created there.

Mechanics:Stored in DBA_DB_LINKS, the link defines a one-way connection via a TNS alias or connect string.

Practical Use:Ensures controlled access; bidirectional access requires explicit configuration.

Edge Case:Loops are prevented unless explicitly designed with mutual links.

D . A public database link can be used by a user connected to the local database instance to connect to any schema in the remote database instance.

False. Public links allow all local users to use them, but access to remote schemas depends on the link's credentials (e.g., CONNECT TO scott) and the user's remote privileges. ''Any schema'' overstates it; access is limited to what the link's user can see.

Why Incorrect:Misrepresents privilege scope; remote schema access isn't universal.

E . Private database link creation requires the same user to exist in both the local and the remote databases.

False. A private link (e.g., CREATE DATABASE LINK my_linkCONNECT TO scott IDENTIFIED BY tiger USING 'orcl') requires the remote user (scott) to exist, but the local creator (e.g., HR) need not match. The link is owned locally and authenticated remotely.

Mechanics:Only the CREATE DATABASE LINK privilege is needed locally.