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Oracle Database Administration II Sample Questions (Q53-Q58):

NEW QUESTION # 53
Choose three. Which three are true about recovery operations done without using Recovery Manager (RMAN)?

A. A lost index tablespace can be re-created without performing any recovery.
B. A lost password file can be re-created with SQL*PLUS.
C. A lost password file can be manually re-created with the orapwd utility.
D. A lost SPFILE can be recovered from memory using SQL*PLUS.
E. A lost PFILE can be re-created from alert.log using SQL*PLUS.
F. A lost TEMPFILE must always be re-created manually.

Answer: C,D,F

NEW QUESTION # 54
Which three are true about Automatic Workload Repository (AWR), Automatic Database Diagnostic Monitor (ADDM), and the Manageability Monitor (MMON) background process? (Choose three.)

A. By default, AWR snapshots are automatically purged after eight days.
B. ADDM can recommend shrinking the buffer cache.
C. By default, MMON creates an AWR snapshot every 30 minutes.
D. ADDM performs its analysis only when a DBA requests it.
E. AWR snapshots must be deleted when no longer required by ADDM.
F. ADDM can recommend extending the buffer cache.

Answer: A,B,E

Explanation:
Explanation/Reference: https://books.google.com.pk/books?id=DeQkU5E75DUC&pg=PA869&lpg=PA869&dq=By+default,
+AWR+snapshots+are+automatically+purged+after+eight
+days&source=bl&ots=DfoGmJfCMy&sig=ACfU3U0Pf2RgIs72LUV4HUzs5UIXI8sXEQ&hl=en&sa=X&ved=2ah UKEwjb8bKhu9noAhUwTxUIHRpYAuMQ6AEwA3oECAsQLA#v=onepage&q=By%20default%2C%20AWR%
20snapshots%20are%20automatically%20purged%20after%20eight%20days&f=false

NEW QUESTION # 55
HR_ROOT is an application container with the HR_APP application installed. No application PDBs and no application seed have yet been created in HR_ROOT. An application PDB, PDB1, must be created so that the HR_APP application's common objects are accessible to it. Which two methods can be used?

A. Create the PDB1 application PDB and synchronize it with HR_ROOT.
B. Create the PDB1 application PDB and install HR_APP in it.
C. Create an application seed, synchronize it with HR_ROOT, and then create the PDB1 application PDB.
D. Create the PDB1 application PDB and synchronize it with PDB$SEED.
E. Create an application seed, and install HR_APP in it.

Answer: A,C

NEW QUESTION # 56
Which two are true about creating pluggable databases (PDBs) using snapshots in Oracle 19c and later releases?

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

Answer: B,C

NEW QUESTION # 57
Which two are true about Oracle Optimizer Statistics, their use, and their collection? (Choose two.)

A. The number of table rows is considered when evaluating the cost of accessing a table using an index.
B. The Statistics Advisor can help recommend the best way to gather statistics.
C. Statistics collected using DBMS_STATS always yield the best optimizer result.
D. The Statistics Advisor generates actions for all recommendations.
E. Index balanced B*Tree height is considered when evaluating the cost of using an index.

Answer: B,E

Explanation:
https://docs.oracle.com/database/121/TGSQL/tgsql_optcncpt.htm#TGSQL218
B is correct. The cost of an index scan depends on the levels in the B-tree, the number of index leaf blocks to be scanned, and the number of rows to be fetched using the rowid in the index keys. The cost of fetching rows using rowids depends on the index clustering factor.
C is correct. The output of the advisor is a report of findings and recommendations, which helps you follow best practices for gathering statistics.

NEW QUESTION # 58
......

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Oracle Database Administration II Sample Questions (Q53-Q58):

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