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Question No. 1

Your database is running in noarchivelog mode. One of the data files belonging to the system tablespace is corrupted. You notice that all online redo logs have been overwritten since the last backup.

Which method would you use to recover the data file?

Answer: C

Question No. 2

During the day, your database must support an OLTP workload that requires a large database buffer cache. At night, it must support batch jobs that require a higher value to be set for large pool.

What must you do to allow the memory pools to change size automatically as required? (Choose the best answer.)

Answer: B

Question No. 3

Identify two scenarios in which the RMAN crosscheck command can be used.

Answer: B, C

Question No. 4

You want to reduce fragmentation and reclaim unused space for the sales table but not its dependent objects. During this operation, you want to ensure the following:

i.Long-running queries are not affected.

ii.No extra space is used.

iii.Data manipulation language (DML) operations on the table succeed at all times throughout the process.

iv.Unused space is reclaimed both above and below the high water mark.

Which alter TABLE option would you recommend?

Answer: C

The COMPACT clause lets you divide the shrink segment operation into two phases. When you specify COMPACT, Oracle Database defragments the segment space and compacts the table rows but postpones the resetting of the high water mark and the deallocation of the space until a future time. This option is useful if you have long-running queries that might span the operation and attempt to read from blocks that have been reclaimed. The defragmentation and compaction results are saved to disk, so the data movement does not have to be redone during the second phase. You can reissue the SHRINK SPACE clause without the COMPACT clause during off-peak hours to complete the second phase.

References:

https://docs.oracle.com/cd/B28359_01/server.111/b28310/schema003.htm


Question No. 5

You are administering a database that supports a data warehousing workload and is running in noarchivelog mode. You use RMAN to perform a level 0 backup on Sundays and level 1 incremental backups on all the other days of the week.

One of the data files is corrupted and the current online redo log file is lost because of a media failure.

Which action must you take for recovery?

Answer: B

See Example 3-6 Recovering a NOARCHIVELOG Database STARTUP FORCE NOMOUNT; RESTORE CONTROLFILE; # restore control file from consistent backup ALTER DATAB ASE MOUNT; RESTORE DATABASE; # restore data files from consistent backup RECOVER DATABASE NOREDO; # specify NOREDO because online redo logs are lost ALTER DATABASE OPEN RESETLOGS;

References: https://docs.oracle.com/database/121/RCMRF/rcmsynta2001.htm#RCMRF140


Question No. 6

For your database, an incremental level 1 backup is taken every week day. On Tuesday, before the backup is performed, you add a new tablespace.

You execute the command:

RMAN> BACKUP INCREMENTAL LEVEL 1 FOR RECOVER OF COPY WITH TAG WEEKLY DATABASE;

Which statement is true about the execution of the command?

Answer: B

Question No. 7

You create a table with the period for clause to enable the use of the Temporal Validity feature of Oracle Database 12c.

Examine the table definition:

create table employees

(empno number, salary number,

deptid number, name varchar2(100),

period for employee_time);

Which three statements are true concerning the use of the Valid Time Temporal feature for the EMPLOYEES table?

Answer: A, B, C

Question No. 8

You execute the commands on a multitenant container database CDB1 that has multiple pluggable databases:

$ . oraenv

ORACLE_SID = [oracle] ? cdb1

The oracle base for ORACLE_HOME=/u01/app/oracle/product/12.1.0/dbhome_1 is /u01/app/oracle

$ rman target /

Recovery Manager : Release 12.1.0.0.2 - production on Fri Ju1 19 05:18:33: 2013

Coppyright (c) 1982, 2013, oracle and/or its affiliates. All rights reserved.

Connected to target database:CDB1 (DBID=782249327)

RMAN>SELECT name FROMv$tablespace;

Which statement is true about the execution of the last command?

Answer: C

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