正確的1Z0-083｜権威のある1Z0-083資格難易度試験｜試験の準備方法Oracle Database Administration II関連試験

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Oracle 1Z1-083（Oracle Database Administration II）認定試験は、データベース管理でのキャリアを促進しようとする個人向けに設計された専門的な認定試験です。この試験は、Database管理者、データベース開発者、およびOracleデータベース管理における能力を証明したい技術サポートの専門家を対象としています。

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Oracle Database Administration II 認定 1Z0-083 試験問題 (Q98-Q103):

質問 # 98
Examine this configuration:
1. The orcl database data files are in Automatic Storage Management (Oracle ASM) disk group +data.
2. orcl uses disk group +fra for the Fast Recovery Area.
3. listener is the listener for orcl.
4. The database, listener, ASM instance, and ASM disk groups are managed by Oracle Restart.
5. All components are currently shut down.
You execute this command:
$ srvctl start database -d ORCL
What is the outcome?

A. Only the orcl database and the ASM instances are started.
B. Only the orcl database instance and the +data and +fra disk groups are started.
C. Only the orcl database instance, the Oracle ASM instance, and the +data and +fra disk groups are started.
D. Only the orcl database instance is started.
E. The ORCL database, the Oracle ASM instances, the +data and +fra disk groups, and the listener are started.

正解：E

質問 # 99
Which two are true about data movement between a non-CDB and a PDB using Data Pump? (Choose two.)

A. A new PDB is automatically created when importing a non-CDB into a CDB.
B. Moving data from a non-CDB to a PDB is only possible by using conventional export and import.
C. Oracle attempts to convert common users to conventional users when moving schemas from a PDB to a non-CDB.
D. Tablespaces are automatically created as need while importing full exports in either a non-CDB or a PDB.
E. Moving data from a PDB to a non-CDB is only possible by using transportable tablespace export and import.
F. Oracle attempts to convert conventional database users to local users when moving schemas from a non-CDB to a PDB.

正解：C、F

質問 # 100
Which two are true about poorly performing SQL statements and their tuning in Oracle database instances? (Choose two.)

A. Poorly performing SQL statements can be tuned automatically by the Oracle server.
B. SQL statements performing many physical I/Os can always have their performance improved by creating indexes.
C. The solution that best optimizes one SQL statement can degrade the performance of others.
D. SQL statements doing only logical reads never require tuning because they do no physical I/O.
E. SQL statements doing joins always do more physical I/O than single table queries.

正解：A、C

解説：
https://docs.oracle.com/cd/B28359_01/server.111/b28274/sql_tune.htm#PFGRF028

質問 # 101
Choose three. Which three are true about the tools for diagnosing Oracle Database failure situations?

A. Flashback commands help with repairing physical errors.
B. The ADR can store metadata in an Oracle Database repository.
C. The Automatic Diagnostic Repository (ADR) has a separate home directory for each instance of each Oracle product that is installed and uses it.
D. The ADR command-line utility (ADRCI) can package incident information to send to Oracle Support.
E. The Data Recovery Advisor uses the ADR.
F. RMAN can always repair corrupt blocks.

正解：B、D、E

質問 # 102
Which two are true about creating pluggable databases (PDBs) using snapshots in Oracle 19c and later releases? (Choose two.)

A. A snapshot copy PDB depends on a storage snapshot which can be stored on any file system.
B. A PDB snapshot is always a full copy of the source PDB.
C. A PDB snapshot is always a sparse copy of the source PDB.
D. A PDB snapshot depends on a storage snapshot which can only be stored on specific file systems.
E. A snapshot copy PDB depends on a storage snapshot which can only be stored on specific file systems.
F. A snapshot copy PDB can be created from a stand-alone clone PDB.
G. A PDB snapshot depends on a storage snapshot which can be stored on any file system.

正解：E、F

解説：
G:
https://docs.oracle.com/en/database/oracle/oracle-database/18/multi/cloning-a-pdb.html#GUID- F26C8A55-2465-475A-905A-83BD2E68AE6E and then create a SNAPSHOT COPY PDB from the standalone PDB.
C:
Storage requirements depend on the setting of the CLONEDB initialization parameter:
CLONEDB=FALSE
The underlying file system for the source PDB files must support storage snapshots. Such file systems include Oracle Automatic Storage Management Cluster File System (Oracle ACFS) and Direct NFS Client storage. Oracle Exadata supports snapshot copy functionality on ASM configured with sparse ASM grid disks.
CLONEDB=TRUE
The underlying file system for the source PDB files can be any local file system, network file system (NFS), or clustered file system that has Direct NFS enabled and supports sparse files.
Most UNIX systems meet these requirements, including Oracle ACFS and ZFS. However, when CLONEDB=TRUE, the source PDB must remain in open read-only mode when clones exist.

質問 # 103
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