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2021 Jun 1Z0-053 Study Guide Questions:

Q271. Given the following RMAN commands, choose the option that reflects the order required to restore your currently operational ARCHIVELOG-mode database.

a. restore database;

b. recover database;

c. shutdown immediate

d. startup

e. restore archivelog all;

f. alter database open

A. a, b, c, d, e, f

B. c, b, a, d, e, f

C. c, b, a, d, f

D. c, a, b, d

E. c, a, e, b, d, f

Answer: E

Q272. If you use ALTER DISKGROUP ... ADD DISK and specify a wildcard for the discovery string, what happens to disks that are already a part of the same or another disk group?

A. The command fails unless you specify the FORCE option.

B. The command fails unless you specify the REUSE option.

C. The command must be reissued with a more specific discovery string.

D. The other disks, already part of the disk group, are ignored.

Answer: D

Q273. You run the following commands:

RMAN> list expired backup;

RMAN> delete expired backup;

What will happen to the backup set pieces associated with the backups that appear in the list expired backup command?

A. They will be renamed.

B. Nothing will happen to them. The backup set pieces do not exist.

C. They will be deleted immediately since they are not in the flash recovery area.

D. You will need to manually remove the physical files listed in the output of the commands.

E. They will become hidden files and removed 10 days later.

Answer: B

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Q274. You executed the following command:

RMAN> RECOVER COPY OF DATAFILE '/u01/app/oracle/oradata/orcl/users01.dbf'

Which statement regarding the above command is correct? 

A. The '/u01/app/oracle/oradata/orcl/users01.dbf' data file is recovered from the image copy.

B. The '/u01/app/oracle/oradata/orcl/users01.dbf' data file is recovered from the last incremental backup.

C. Image copies of the '/u01/app/oracle/oradata/orcl/users01.dbf' data file are updated with all changes up to incremental backup SCN.

D. Image copies of the '/u01/app/oracle/oradata/orcl/users01.dbf' data file are recovered using the above command if data file recovery fails.

Answer: C

Q275. As soon as you discover that you have lost an online redo log, if the database is still functioning, what should be your first action?

A. Shut down the database

B. Clear the online redo log

C. Back up the database

D. Checkpoint the database

E. Call Oracle support

Answer: D

Q276. At the request of a user, you issue the following command to restore a dropped table:

flashback table "BIN$F2JFfMq8Q5unbC0ceE9eJg==$0" to before drop;

Later, the user notifies you that the data in the table seems to be very old and out of date. What might be the problem?

A. Because a proper range of SCNs was not specified, the wrong data was restored.

B. A proper range of timestamps was not specified, so the wrong data was restored.

C. A previous Flashback Drop operation had been performed, resulting in multiple versions of the table being stored in the Recycle Bin.

D. Either option A or B could be correct. Not enough information was provided to determine which.

E. None of the above.

Answer: C

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Q277. You want to track and store all transactional changes to a table over its lifetime. To accomplish this task, you enabled Flashback Data Archive with the retention of 5 years. After some time, the business requirement changed and you were asked to change the retention from 5 years to 3 years. To accomplish this, you issued the following command:


What is the implication of this command?

A. The command produces an error because the retention time cannot be reduced.

B. All historical data is retained but the subsequent flashback data archives are maintained for only three years.

C. All historical data is purged and the new flashback data archives are maintained for three years.

D. All historical data older than three years is purged from the flashback archive FLA1.

Answer: D

Q278. You want to analyze a SQL Tuning Set (STS) using SQL Performance Analyzer in a test database. Which two statements are true regarding the activities performed during the test execution of SQLs in a SQL Tuning Set? (Choose two.)

A. Every SQL statement in the STS is considered only once for execution.

B. The SQL statements in the STS are executed concurrently to produce the execution plan and execution statistics.

C. The execution plan and execution statistics are computed for each SQL statement in the STS.

D. The effects of DDL and DML are considered to produce the execution plan and execution statistics.

Answer: AC

Q279. Which of the following statements is true when the database is in ARCHIVELOG mode and tablespaces are in hot backup mode?

A. Archive log generation is suspended until the tablespaces are taken out of hot backup mode.

B. Datafiles are not written to during hot backups.

C. Changes to the database are cached during the backup and not written to the datafiles to ensure that the datafiles are consistent when recovered.

D. The datafile headers are not updated during the backup.

E. The way data is written to the online redo logs is unchanged during the backup.

Answer: D

Q280. During the installation of Oracle Database 11g, you do not set ORACLE_BASE explicitly. You selected the option to create a database as part of the installation. How would this environment variable setting affect the installation?

A. The installation terminates with an error.

B. The installation proceeds with the default value without warnings and errors.

C. The installation proceeds with the default value but it would not be an OFA-compliant database.

D. The installation proceeds with the default value but a message would be generated in the alert log file.

Answer: D