1Z0-083試験の準備方法｜正確的な1Z0-083模擬モード試験｜信頼的なOracle Database Administration II日本語問題集長年の訂正と修正を受けて、1Z0-083試験問題はすでに完璧になっています。彼らは、エラーのない有望な練習資料です。当社はまた、顧客第一です。そのため、まずあなたの興味のある事実を考慮します。お客様のニーズに基づいたすべての先入観とこれらすべてが、満足のいく快適な購入サービスを提供するための当社の信念を説明しています。 1Z0-083をシミュレートする実践がすべての責任を負い、予測可能な結果をもたらす可能性があり、私たちを確実に信じることを後悔することはありません。 Oracle Database Administration II 認定 1Z0-083 試験問題 (Q97-Q102):質問 # 97
Which are three of the steps taken by Database Configuration Assistant (DBCA) to clone a remote pluggable database (PBD) starting from Oracle 19c? (Choose three.)
A. automatically dropping the database link to the remote database if it already exists
B. creating a database link from CDB$ROOT in the remote database to be cloned to CDB$ROOT in the local database
C. creating a database link from CDB$ROOT in the remote database to the PDB in the local database
D. creating a database link from CDB$ROOT in the local database to the PDB in the remote system that is to be cloned
E. opening the cloned PDB
F. creating a database link from CDB$ROOT in the local database to CDB$ROOT in the remote system that is to be cloned
G. creating a new empty PDB in the local database from PDB$SEED
正解：A、C、F
質問 # 98
Examine these queries and their output:
After a system crash, an instance restart and an attempted opening of the PDBs result in:
Which two are true? (Choose two.)
A. Data file 24 can be recovered while CDB$ROOT and PDB$SEED are opened.
B. Data file 24 must be recovered while the CDB is opened.
C. Data file 24 can be recovered while PDB2 is opened.
D. Data file 24 must be recovered while PDB2 is closed.
19c: PDB SYSTEM or UNDO Tablespace Recovery: The CDB and all other PDBs can be left opened. 1. Connect to PDB 2. Shutdown abort the PDB, if its not automatically done. sqlplus sys@sales_pdb as sysdba sql> SHUTDOWN ABORT; OR ALTER PLUGGABLE DATABASE CLOSE ABORT; rman target sys@slaes_pdb rman> restore database; rman> recover database; rman> alter pluggable database sales_pdb open;
E. Data file 24 cannot be recovered while the CDB is opened.
正解：B、C
質問 # 99
Which statement correctly describes the SQL profiling performed by the SQL Tuning Advisor?
A. It is a set of recommendations by the optimizer to restructure a SQL statement to avoid suboptimal execution plans.
B. It is auxiliary information collected by the optimizer for a SQL statement to eliminate estimation error.
C. It is auxiliary information collected by the optimizer for a SQL statement to help use better joins orders.
D. It is a set of recommendations by the optimizer to change the access methods used.
E. It is a set of recommendations by the optimizer to create new indexes.
正解：A
質問 # 100
Examine this output:
Which two are true? (Choose two.)
A. Any PDB not specified in the plan will be unable to execute statements in parallel.
B. PDB2 is guaranteed at least 25% of the available parallel execution processes if there is enough demand.
C. PDB3 can use all available parallel execution processes at times.
D. PDB1 is always limited to 40% of the available system resources regardless of demand.
E. PDB3 is guaranteed to receive at least 20% of the available system resources if there is enough demand.
F. Any PDB not specified in the plan will be able to use a maximum of 16.5% of the available system resources.
正解：A、C
解説：
A). Correct as then a PDB will get assigned the default directive with parallel_server_limit set to 0
B). Correct as parallel_server_limit is not specified for PDB3 and it defaults to 100 Quote: https://docs.oracle.com/database/121/ADMIN/dbrm.htm#ADMIN14008
"If PARALLEL_SERVER_LIMIT is not specified, then it defaults to 100%."
C). Incorrect. A PDB can use more resources:
Quote from https://docs.oracle.com/database ... dbrm.htm#ADMIN13777
"However, any PDB can use more than the guaranteed amount of a resource if there is no resource contention."
D). Incorrect. Shares is a minimum guaranteed value. But a PDB can use more as explained above in C.
E). Incorrect. Nothing confirms that there are only 3 PDBs attached. There may be others using the default pdb directive. Then the share for PDB2 is not 20%
F). Incorrect. parallel_server_limit is an upper limit.
質問 # 101
Which two are true about the SQL Tuning Advisor?
A. It considers all SQL statements being analyzed by the advisor task as a group.
B. It checks each query being analyzed for missing or stale statistics.
C. It can recommend semantic changes to SQL statements.
D. It only recommends syntactic changes to SQL statements.
E. It prevents performance regressions for SQL statements when changes are made.
