Oracle 1Z0-182勉強ガイド、1Z0-182問題数Fast2testは、すべての受験者に1Z0-182試験の十分な知識を持つ専門家によってコンパイルされた1Z0-182テストトレントを提供し、1Z0-182学習教材のコンパイルに非常に専門的です。それだけでなく、テストトレント1Z0-182の最新情報を保持するために、チームは毎日更新を確認します。最新バージョンを入手したら、できるだけ早くメールボックスに送信します。試験に最適な1Z0-182学習教材を提供するのに最適なプラットフォームである必要があります。 Oracle Database 23ai Administration Associate 認定 1Z0-182 試験問題 (Q75-Q80):質問 # 75
Which two actions can you perform using DBCA for an existing database?
A. Create nonstandard block size tablespaces.
B. Create an additional listener.
C. Change the character set.
D. Create a template that can be used to clone the database.
E. Change the server mode from dedicated to shared, and vice versa.
正解：D、E
解説：
A .False. DBCA can't change character sets post-creation.
B .False. Listeners are managed via NetCA or lsnrctl.
C .True. DBCA can switch server modes for existing DBs.
D .False. Tablespaces are created via SQL, not DBCA for existing DBs.
E .True. DBCA can generate clone templates from existing DBs.
質問 # 76
Which two statements are true about the UNLIMITED TABLESPACE system privilege and space quota?
A. By default, users have no quota on their default permanent tablespace.
B. It is overridden by a space quota specified for the user.
C. It allows a role to have unlimited space in any tablespace in the database.
D. It allows a user to have unlimited space in any tablespace in the database.
E. It allows a user to have unlimited space only in their default permanent tablespace.
正解：B、D
解説：
A .True. Grants unlimited space across all tablespaces.
B .True. Explicit quotas override the privilege.
C .False. Not limited to default tablespace.
D .False. Roles can't have this privilege directly.
E .False. Default is zero quota unless specified.
質問 # 77
Which three statements are true about roles?
A. Roles must be password protected.
B. Roles may be granted to other roles.
C. All roles granted to a user are set on default when the user logs in.
D. Object privileges may not be granted to roles.
E. The SET ROLE statement can disable one or more roles for a session.
F. The SET ROLE statement can enable one or more roles for a session.
正解：B、E、F
解説：
Roles in Oracle manage privileges efficiently. Let's dive into each option:
A . Roles must be password protected.
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.
Mechanicsassword-protected roles need SET ROLE mgr IDENTIFIED BY secret, enhancing security for sensitive privileges.
B . Roles may be granted to other roles.
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.
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.
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.
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.
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.
質問 # 78
Which two statements are true about the configuration and use of UNDO?
A. Active UNDO is always retained.
B. UNDO_RETENTION specifies how long all types of UNDO are retained.
C. Unexpired UNDO is always retained.
D. UNDO_RETENTION specifies for how long Oracle attempts to keep unexpired UNDO.
E. UNDO_RETENTION specifies for how long Oracle attempts to keep expired and unconsumed UNDO.
正解：A、D
解説：
A .True. Active (in-use) UNDO is never overwritten.
B .False. Unexpired UNDO can be reused if space is needed.
C .False. Applies to unexpired, not expired UNDO.
D .False. Only unexpired UNDO is targeted.
E .True. UNDO_RETENTION sets the retention goal for unexpired UNDO.
質問 # 79
Which two Oracle database space management features require the use of locally managed tablespaces?
A. Automatic data file extension (AUTOEXTEND).
B. Server-generated tablespace space alerts.
C. Online segment shrink.
D. Oracle Managed Files (OMF).
E. Free space management with bitmaps.
正解：C、E
解説：
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.
assword-protected roles need SET ROLE mgr IDENTIFIED BY secret, enhancing security for sensitive privileges.