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NO.1 Your database is running in archivelog mode. Examine the parameters for your database
instance:
LOG_ARCHIVE_DEST_l ='LOCATION=/disk1/arch MANDATORY' LOG_ARCHIVE_DEST_2
='LOCATION=/disk2/arch' LOG_ARCHIVE_DEST_3 ='LOCATIO=/disk3/arch' LOG_ARCHIVE_DEST_4
='LOCATIONs/disk4/arch' LOG_ARCHIVE_MIN_SUCCEED_DEST=2
While the database is open, you notice that the destination set by the log_archive_dest_1 parameter
is not available. All redo log groups have been used.
What happens at the next log switch?
A. The database instance hangs and the redo log files are not overwritten.
B. The archived redo log files are written to the fast recovery area until the mandatory destination is
made available.
C. The database instance is shutdown immediately.
D. The destination set by the log_archive_destparameter is ignored and the archived redo log files
are created in the next two available locations to guarantee archive log success.
Answer: D
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NO.2 You notice that the performance of your production 24/7 Oracle 12c database has significantly
degraded. Sometimes you are not able to connect to the instance because it hangs. You do not want
to restart the database instance.
How can you detect the cause of the degraded performance?
A. Enable Memory Access Mode, which reads performance data from SGA.
B. Use emergency monitoring to fetch data directly from SGA for analysis.
C. Run Automatic Database Diagnostic Monitor (ADDM) to fetch information from the latest
Automatic Workload Repository (AWR) snapshots.
D. Use Active Session History (ASH) data and hang analysis in regular performance monitoring,
E. Run ADDM in diagnostic mode.
Answer: C
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Explanation:
* In most cases, ADDM output should be the first place that a DBA looks when notified of a
performance problem.
* Performance degradation of the database occurs when your database was performing optimally in
the past, such as 6 months ago, but has gradually degraded to a point where it becomes noticeable to
the users. The Automatic Workload Repository (AWR) Compare Periods report enables you to
compare database performance between two periods of time.
While an AWR report shows AWR data between two snapshots (or two points in time), the AWR
Compare Periods report shows the difference between two periods (or two AWR reports with a total
of four snapshots). Using the AWR Compare Periods report helps you to identify detailed
performance attributes and configuration settings that differ between two time periods.
Reference: Resolving Performance Degradation Over Time
NO.3 Automatic Undo Management is enabled for your database. You want a user to retrieve
metadata and historical data for a given transaction or for transactions in a given time interval.
Which three are prerequisites to fulfill this requirement?
A. Minimal supplemental logging must be enabled.
B. The database must be running in archivelog mode.
C. Flashback Data Archive must be created and the flashback archive administer system privilege
must be granted to the user.
D. The flashback any table privilege must be granted to the user.
E. The select any transaction privilege must be granted to the user.
F. Therecycle binparameter must be set to on.
Answer: C,D,E
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NO.4 Users report this error message when inserting rows into the orders table:
ERROR atline1:
ORA-01654f:unable to extend index USERS.ORDERS_IND by 8in tablespace INDEXES
You determine that the indexes tablespace is out of space and there is no free space on the
filesystem used by the Oracle database.
Which two must you do to fix this problem without affecting currently executing queries?
A. drop and re-create the index
B. coalesce the orders ind index
C. coalesce the indexes tablespace
D. perform an on line table rebuild using dbns_redefir.ition.
E. rebuild the index online moving it to another tablespace that has enough free space for the index
Answer: A,C
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NO.5 For which two requirements would you use the Database Resource Manager?
A. limiting the CPU used per database call
B. specifying the maximum number of concurrent sessions allowed for a user
C. specifying the amount of private space a session can allocate in the shared pool of the SGA
D. limiting the degree of parallelism of operations performed by a user or group of users
E. specifying an idle time limit that applies to sessions that are idle and blocking other sessions
Answer: B,E
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NO.6 In which three scenarios is media recovery required?
A. when a tablespace is accidentally dropped from a database
B. when archived redo log files are lost
C. when data files are lost
D. when one of the online redo log members is corrupted
E. when all control files are lost
Answer: A,D,E
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Reference:http://docs.oracle.com/cd/A87860_01/doc/server.817/a76993/recoscen.htm
NO.7 Which three statements are true about Consolidated Database Replay?
A. The workload capture and replay systems must have the same operating system (OS).
B. Multiple workload captures from multiple databases can be replayed simultaneously on all
pluggable databases (PDBs) in a multitenant container database (CDB).
C. A subset of the captured workload can be replayed.
D. The number of captured workloads must be the same as the number of PDBs in a multitenant CDB
.
E. Multiple replay schedules can be defined for a consolidated replay and during replay initialization,
you can select from any of the existing replay schedules.
Answer: B,C,E
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NO.8 Which two statements are true when row-archival management is enabled?
A. Visibility of theORA_ARCHIVE_STATEcolumn is controlled by the row archival visibility session
parameter.
B. TheORA_ARCHIVE_STATEcolumn is updated manually or by a program that can reference activity
tracking columns, to indicate that a row is no longer considered active.
C. The row archival visibility session parameter defaults to all rows.
D. TheORA_ARCHIVE_STATEcolumn is visible if it is referenced in the select list of a query.
E. TheORA_ARCHIVE_STATEcolumn is updated automatically by the database based on activity
tracking columns, to indicate that a row is no longer considered active.
Answer: A,D
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