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Oracle 1Z0-182 시험요강:

주제
소개

주제 1

• Describe Managing Database Instances: This section tests the knowledge of Database Administrators in performing essential tasks for managing database instances. It includes starting and shutting down databases, utilizing dynamic performance views, managing initialization parameter files, and using the Automatic Diagnostic Repository (ADR) for troubleshooting.

주제 2

• Managing Tablespaces and Datafiles: This section assesses the abilities of Storage Administrators in creating, modifying, and describing tablespaces. It also covers recognizing data storage requirements and understanding datafile placement for efficient storage management.

주제 3

• Introduction to Performance: This section evaluates the expertise of Performance Analysts in summarizing Oracle database performance management techniques. It includes measuring database performance using SQL execution plans, directives, and advisors to ensure optimal system efficiency.

주제 4

• Displaying Creating and Managing PDBs: This section assesses the knowledge of Cloud Database Architects in creating pluggable databases (PDBs) from seeds or other techniques. It also covers modifying PDB modes and attributes to meet specific application requirements.

주제 5

• Managing Undo: This domain measures the skills of Database Administrators in using undo data effectively. It compares undo data with redo data and explains temporary undo usage for efficient transaction management.

주제 6

• Managing Users, Roles, and Privileges: This domain evaluates the expertise of Security Administrators in implementing user security measures. It focuses on creating and managing users, roles, and privileges to ensure secure access to Oracle databases.

주제 7

• Managing Storage: This section tests the knowledge of Storage Engineers in managing storage features such as resumable space allocation, segment space-saving, and block space management. It also includes defining segment characteristics to optimize storage utilization.

주제 8

• Automated Maintenance: This section measures the skills of Database Administrators in describing automated maintenance tasks within Oracle databases. It focuses on applying automated features to streamline routine maintenance activities.

주제 9

• Moving Data: This section evaluates the expertise of Data Migration Specialists in moving data within Oracle databases. It includes using external tables, executing Oracle Data Pump operations, and distinguishing SQL*Loader commands for importing data efficiently.

 

최신 Oracle Database 23ai 1Z0-182 무료샘플문제 (Q92-Q97):

질문 # 92
Which two statements are true about User Authentication in an Oracle Database?

• A. Operating System authentication may be used for system-privileged administrative users.
• B. Password File authentication must be used for system-privileged administrative users.
• C. REMOTE_LOGIN_PASSWORDFILE must be set to EXCLUSIVE to permit password changes for system-privileged administrative users.
• D. Password authentication must be used for system-privileged administrative users.
• E. Password File authentication is supported for any type of database user.

정답：A,B

설명：
User authentication in Oracle 23ai determines how users (especially administrative ones) connect to the database. Let's analyze each option with extensive detail:
A . Operating System authentication may be used for system-privileged administrative users.
True. OS authentication allows users mapped to OS accounts (e.g., ops$oracle) to connect without a password, often used for administrative users like SYS or SYSTEM. This is configured by creating an externally authenticated user (e.g., CREATE USER "OPS$ORACLE" IDENTIFIED EXTERNALLY) and relies on the OS to verify identity.
Mechanics:When a user logs in via sqlplus / as sysdba, Oracle checks the OS user against the dba group (Unix) or ORA_DBA (Windows). If matched, no password is needed, leveraging OS security.
Practical Use:Common for DBAs managing local instances, reducing password management overhead.
Edge Case:Requires REMOTE_LOGIN_PASSWORDFILE=NONE for exclusive OS auth, but this isn't mandatory if a password file exists alongside.
Historical Note:Introduced in early Oracle versions, this remains a robust option in 23ai for local admin access.
B . Password authentication must be used for system-privileged administrative users.
False. "Must" is incorrect; password authentication (e.g., sqlplus sys/password) is an option, not a requirement. OS authentication or password file authentication can also be used for users like SYS. This option overstates the necessity of password-based login.
Why Incorrect:Oracle's flexibility allows multiple methods, contradicting the absolute phrasing here.
C . Password File authentication is supported for any type of database user.
False. Password file authentication is restricted to users with SYSDBA, SYSOPER, or similar system privileges (e.g., SYSBACKUP). Regular users (e.g., HR) can't use the password file (orapw); they rely on database authentication (passwords stored in the DB) or external methods.
Mechanics:The password file stores hashed credentials for privileged users, checked during remote AS SYSDBA logins.
Why Incorrect:Extending this to "any user" ignores Oracle's security model limiting password file usage.
D . REMOTE_LOGIN_PASSWORDFILE must be set to EXCLUSIVE to permit password changes for system-privileged administrative users.
False. REMOTE_LOGIN_PASSWORDFILE=EXCLUSIVE allows a dedicated password file for one instance, enabling password changes via ALTER USER SYS IDENTIFIED BY newpass. However, SHARED mode also permits changes for SYS, though not for other users added to the file. The "must" overstates the requirement; it's sufficient, not necessary.
Mechanics:EXCLUSIVE locks the file to one DB, while SHARED allows multiple DBs to use it, with restrictions on non-SYS users.
E . Password File authentication must be used for system-privileged administrative users.
True. For remote administrative access (e.g., sqlplus sys/password@orcl as sysdba), a password file is mandatory when REMOTE_LOGIN_PASSWORDFILE is EXCLUSIVE or SHARED. Local OS authentication is an alternative, but for network-based admin tasks, the password file is required, making this statement true in that context.
Mechanics:Set via orapwd (e.g., orapwd file=orapworcl password=oracle entries=10), enabling remote SYSDBA logins.
Edge Case:If REMOTE_LOGIN_PASSWORDFILE=NONE, only OS auth works locally, but this isn't the default or typical setup.

 

질문 # 93
Which two Oracle database space management features require the use of locally managed tablespaces?

• A. Automatic data file extension (AUTOEXTEND).
• B. Oracle Managed Files (OMF).
• C. Free space management with bitmaps.
• D. Online segment shrink.
• E. Server-generated tablespace space alerts.

정답：C,D

설명：
A .False. Works with DMTs too.
B .True. LMTs use bitmaps, unlike DMT freelists.
C .False. OMF is independent of management type.
D .False. Alerts work with both.
E .True. Shrink requires LMTs with ASSM.

 

질문 # 94
In the SPFILE of a single instance database, LOCAL_LISTENER is set to LISTENER_1. The TNSNAMES.ORA file in $ORACLE_HOME/network/admin in the database home contains: LISTENER_1 = (ADDRESS = (PROTOCOL = TCP)(HOST = host1.abc.com)(PORT = 1521)). Which statement is true?

• A. There are two listeners named LISTENER and LISTENER_1 running simultaneously using port 1521 on the same host as the database in LISTENERS.
• B. The definition for LISTENER_1 requires a CONNECT_DATA section to enable dynamic service registration.
• C. LISTENER_1 must also be defined in the LISTENER.ORA file to enable dynamic service registration.
• D. Dynamic service registration cannot be used for this database instance.
• E. The LREG process registers services dynamically with the LISTENER_1 listener.

정답：E

설명：
Dynamic service registration allows a database to automatically register its services with a listener without manual configuration in LISTENER.ORA. Let's analyze each option:
A . The definition for LISTENER_1 requires a CONNECT_DATA section to enable dynamic service registration.
False. The CONNECT_DATA section is part of a client-side TNSNAMES.ORA entry for connecting to a service, not for listener registration. Dynamic registration is handled by the database's LREG (Listener Registration) process, which uses the LOCAL_LISTENER parameter to locate the listener's address (e.g., host1.abc.com:1521). No CONNECT_DATA is needed in the listener address definition itself. This option confuses client connection syntax with listener configuration.
Mechanics:The listener address in TNSNAMES.ORA (LISTENER_1) is sufficient for LREG to find and register with it, as long as the listener is running at that address.
B . LISTENER_1 must also be defined in the LISTENER.ORA file to enable dynamic service registration.
False. Dynamic registration doesn't require the listener to be explicitly defined in LISTENER.ORA. The LOCAL_LISTENER parameter pointing to LISTENER_1 (resolved via TNSNAMES.ORA) tells LREG where to register services. If the listener is running on host1.abc.com:1521, LREG will find it without a LISTENER.ORA entry. However, LISTENER.ORA is needed tostartthe listener process, but that's separate from dynamic registration.
Practical Note:If LISTENER.ORA isn't configured, a default listener might run on port 1521, but the question implies LISTENER_1 is operational.
C . The LREG process registers services dynamically with the LISTENER_1 listener.
True. In Oracle 23ai, the LREG background process (replacing PMON's registration role in earlier versions) dynamically registers database services with listeners specified by LOCAL_LISTENER. Here, LOCAL_LISTENER=LISTENER_1 resolves to host1.abc.com:1521 via TNSNAMES.ORA. LREG periodically sends service information (e.g., service names, instance details) to the listener, enabling clients to connect without static configuration.
Mechanics:LREG uses the TNS alias (LISTENER_1) to locate the listener's IP and port, registers services like orcl or orclpdb, and updates the listener's service table. This happens automatically every 60 seconds or on significant events (e.g., instance startup).
D . Dynamic service registration cannot be used for this database instance.
False. The setup (LOCAL_LISTENER set and a valid TNSNAMES.ORA entry) explicitly supports dynamic registration. No blockers (e.g., REGISTRATION_EXCLUDED_LISTENERS) are mentioned, so LREG can function normally.
E . There are two listeners named LISTENER and LISTENER_1 running simultaneously using port 1521 on the same host as the database in LISTENERS.
False. The question mentions only LISTENER_1 in the SPFILE and TNSNAMES.ORA. There's no evidence of a second listener (LISTENER) or a LISTENERS configuration (possibly a typo). Two listeners can't share the same port (1521) on the same host due to port conflicts unless explicitly configured with different IPs, which isn't indicated here.

 

질문 # 95
You want to view the initialization parameter settings for only a specific PDB. Which of the following statements is true?

• A. From the CDB root, execute SELECT db_uniq_name, pdb_uid, name, value$ FROM pdb_spfiles;
• B. From the PDB, execute SELECT db_uniq_name, pdb_uid, name, value$ FROM pdb_spfile$;
• C. From the CDB root, execute SELECT NAME, VALUE, ISPDB_MODIFIABLE FROM v$parameter;
• D. From the PDB, execute SELECT NAME, VALUE, ISPDB_MODIFIABLE FROM v$parameter;

정답：D

설명：
A .Incorrect syntax and view (pdb_spfile$ is not a valid view; PDB_SPFILE$ exists but lacks value$).
B .From CDB root, V$PARAMETER shows all parameters, not PDB-specific ones.
C .pdb_spfiles is not a valid view; PDB_SPFILE$ exists but requires scoping to a PDB.
D .True. From the PDB, V$PARAMETER shows parameters specific to that PDB, including inherited and PDB-modified values, with ISPDB_MODIFIABLE indicating alterability.

 

질문 # 96
Which of the following is true about the status of a PDB that has been unplugged from a CDB?

• A. The STATUS column in CDB_PDBS of the unplugged PDB will be REMOVED.
• B. The STATUS column in CDB_PDBS of the unplugged PDB will be DISABLED.
• C. The STATUS column in CDB_PDBS of the unplugged PDB will be UNAVAILABLE.
• D. The STATUS column in CDB_PDBS of the unplugged PDB will be UNPLUGGED.

정답：D

설명：
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.

 

질문 # 97
......

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