Oracle Architecture MCQ

This Oracle Architecture MCQ test check the understanding on various topics like Recovery Manager (RMAN), Oracle Architecture concept like shared pool ,PGA, Library cache size,Backup & recovery , Oracle Memory structure, Background processes, Dictionary views , alert logs ,oracle tablespace ,indexes , profiles and many more

The below test is randomized Oracle Architecture MCQ and select 40 questions from the set of many questions,so each time you try to attempt it, you will get different questions in different order and option would also be in different order, So it will be fun practicing with this tool. You can try as many times as you want till you feel comfortable about it

Instructions for online test

1.This quiz consists of 40 questions .It is recommended to complete the test in 60 min
2. It consists both single choice and more than one choice questions to test your knowledge
3. You can press the submit button at the end of your test and get the final score
4.You will also get the know the correct choice after you finished the test.

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1. Which Oracle process is responsible for archiving the online redo log files when the automatic archiving feature is enabled in ARCHIVELOG mode?

DBWn

SMON

LGWR

ARCn

PMON

Question 1 of 40

2. Assume that you need to restore and recover a database that's operating in ARCHIVELOG mode. The archive log files available for recovery start from log sequence 21156 to 21190. If the archived log files with sequence number 21187, 21184, and 21180 are corrupted, then until which log sequence can you recover the database?

21190

21180

21184

21187

Question 2 of 40

3. an oracle instance is made up of

sga and background process

sga , alert log, trace file

sga and the init.ora

sga and data file , control files , and redo logs

Question 3 of 40

4. What must you do after the completion of copying the data files while performing online database backup?

Execute the ALTER SYSTEM CHECKPOINT command.

Execute the ALTER SYSTEM SWITCH LOGFILE command and copy the archive log files since the beginning of online backup.

Shut down the database gracefully and restart.

Back up the online redo log files.

Question 4 of 40

5. which of the following components of the SGA records changes made to the database for recovery purpose

database buffer cache

redo log buffer

shared pool

large pool

Question 5 of 40

6. Which Oracle background process frees SGA resources that were allocated to a user process that failed?

ckPt

SMON

LGWR

PMON

Question 6 of 40

7. What is the default value for the initialization parameter CONTROL_FILE_RECORD_KEEP_TIME?

One day

Five days

Seven days

Nine days

Question 7 of 40

8. What is the significance of using the command SET NEWNAME in the script shown in the following code?
Run
{
allocate channel c1 type disk;
set newname for datafile 1 to '+DATA';
restore datafile 1;
switch datafile 1;
recover datafile 1;
sql 'Alter database open';
}

Prompts the user to enter a new name after the execution of the RUN block

Specifies a new location in the RUN block where the data file needs to be restored

Control file is updated with the new location specified in the RUN block

Renames the data file in the RUN block

Question 8 of 40

9. What is the most important action a DBA must perform after changing the database from NOARCHIVELOG TO ARCHIVELOG?

Shutdown normal and restart the database

Perform a full database logical backup

Manually switch the log files

Perform a full database backup

Question 9 of 40

10. Which one of the following statements about the tnsping utility is correct?

It does not require the username and password to check the connectivity of the service.

It helps you to determine whether or not the Oracle database is running.

It requires the username and password to check the connectivity of the service.

It establishes a session with the database and checks the connectivity of the service.

Question 10 of 40

11. Which type of LOBs cannot be declared as temporary?

NCLOB

BFILE

BLOB

CLOB

Question 11 of 40

12. Which one of the following commands can you use to display whether or not the automatic archiving feature is enabled?

ARCHIVE LOG LIST

ARCHIVE LOG REPORT

ARCHIVE LOG STATUS

ARCHIVE LOG NEXT

Question 12 of 40

13. In which one of the following loading methods does SQL*Loader compete with the other processes to acquire buffer resources?

Direct path load

None of the above

Distributed path load

Conventional path load

Question 13 of 40

14. Which one of the following options of the export utility enables data to be directly transferred to the client without the intermediate evaluation buffer?

CONVENTIONAL=Y

IGNORE=Y

DIRECT=N

DIRECT=Y

Question 14 of 40

15. What is the result of issuing the following command? SQL> ALTER SYSTEM SET SHARED_SERVERS=0;

It disables the shared server.

The minimum number of shared server processes will be run.

All the existing connections will be terminated immediately.

The database will be restarted.

Question 15 of 40

16. Due to a media failure the user10.dbf data file was lost. Which one of the following commands must DBA use at the RMAN prompt, to copy the data files from the backup location to their default location before performing recovery operations?

REINSTATE

RECOVER

ALLOCATE

RESTORE

Question 16 of 40

17. which of the following views contains information about overall system statistics, both previously and currently connected

v$statname

v$sgastat

v$systat

v$sesstat

Question 17 of 40

18. which of the following oracle background process writes blocks from the database buffer caches to the datafile

SMON

DBW0

LGWR

CKPT

Question 18 of 40

19. Which one of the following Oracle components or products must be installed and configured to enable the secure communications between the client and the server over the network?

Advanced network option

Connection Manager

Intelligent agent

Security server

Question 19 of 40

20. Which one of the following statements is true about the LogMiner utility?

LogMiner can be used for media recovery.

LogMiner can be used for instance recovery.

LogMiner generates SQL_REDO as well as SQL_UNDO with primary key information.

LogMiner can be used by Oracle for log recovery.

Question 20 of 40

21. Which one of the following commands must be issued to remove a stored script from the recovery catalog?

ERASE SCRIPT

DELETE SCRIPT

UNCATALOG SCRIPT

REMOVE SCRIPT

Question 21 of 40

22. When can you perform a database backup using RMAN if the database is in ARCHIVLOG mode?

RESTRICTED SESSION

OPEN

CLOSED

MOUNT

NOMOUNT

Question 22 of 40

23. Which one of the following statements enables the control file AUTOBACKUP feature?

RMAN>SHOW ALL;

RMAN>CONFIGURE CONTROLFILE AUTO ON;

RMAN>CONTROLFILE AUTO BACKUP;

RMAN>CONFIGURE CONTROLFILE AUTOBACKUP ON;

RMAN>CONFIGURE CONTROLFILE BACKUP AUTO;

Question 23 of 40

24. which of the following is the first step in oracle’s recommended tuning

tune the application

all the above are equally important

tune the network

tune the database

Question 24 of 40

25. The buffers in the database buffer cache that are currently being accessed by a server process are referred to as?

Reuse buffers

Free buffers

Pinned buffers

Dirty buffers

Question 25 of 40

26. index organized tables store row data that exceeds the index’s pct threshold in what type of segment

overflow segment

excess segment

chain segment

index segment

Question 26 of 40

27. which of the following background processes detects failed user process and roll backs

SMON

CKPT

DBW0

PMON

Question 27 of 40

28. Which one of the following files contains records that are rejected by SQL*Loader due to invalid input format?

Bad

Discard

Parameter file

log

Control

Question 28 of 40

29. Prior to performing an incomplete database recovery, what is the most important task that you are supposed to perform as a DBA?

Open the database in NOMOUNT mode.

Perform a full backup.

Restore the archived redo log files.

Restore the control files.

Question 29 of 40

30. Which two statements are true when corrupted blocks are skipped?

If the freelist is corrupt the table has to be re-created.

All rows in a corrupt block are inaccessible.

Only the corrupted rows within a block will be inaccessible.

Indexes pointing to corrupt blocks will be marked as invalid.

Queries have to be rewritten so they will skip corrupted blocks.

Referential integrity may be violated.

Question 30 of 40

31. Due to a media failure, all the members that are part of an online redo log group are lost. Under what conditions can you still recover the database without data loss?

The lost redo log group is the CURRENT group.

The lost redo log group has already been archived.

You cannot perform recovery when all the members associated with an online redo log group are lost

The lost redo log group is not the CURRENT group but has not yet been archived.

Question 31 of 40

32. While performing an online backup, the database crashed due to a media failure. DBA kept several tablespaces in backup mode, and each tablespace had several data files. Which one of the following statements is most appropriate to use for taking the tablespaces out of backup mode?

ALTER DATABASE END BACKUP

ALTER DATABASE DATAFILE END BACKUP

RECOVER DATABASE

ALTER TABLESPACE END BACKUP

Question 32 of 40

33. the alert log contains information on all but which of the following

redo log switches

instance startup and shutdown

creation of new database users

all of the above are in the alert log

Question 33 of 40

34. if the init.ora optimizer mode is set to choose, but no statistics have been generated for the application’s tables and indexes, which optimizer mode will oracle user

none of the above

hint

rule

cost

Question 34 of 40

35. which of the following factors would not make a column a good candidate for b-tree index

most queries on the table return only small portion of all row

the data in the column has low cardinality

none of the above

the column frequently used in sql statement where clause

Question 35 of 40

36. To enable a database to have more than one service associated with it, the connect descriptor SID parameter in the tnsnames.ora file has been replaced by which two parameters?(Choose two)

DISPATCHERS.

SERVICE _NAME

INSTANCE_NAME.

LISTENER_NAME.

Question 36 of 40

37. Which three statements about fine-grained access control are true?

Security can be built in the database server instead of each application.

The application context is not required, but recommended.

Security cannot be bypassed as it built into the database server.

The application context is required.

Security cannot be bypassed as it is built into each application.

Question 37 of 40

38. Which one of the following parameters when specified determines the maximum number of the files that can be stored in each backup set?

BACKUPPERSET

FILESPERSET

MAXSETSIZE

FILESPERBACKUP

Question 38 of 40

39. Which command will open a standby database in read-only mode?

ALTER DATABASE OPEN READ ONLY;

STARTUP READ ONLY;

ALTER DATABASE MOUNT READ ONLY;

ALTER DATABASE READ ONLY;

Question 39 of 40

40. What can you see when querying V$LOGMNR_CONTENTS?

The old image and the new image of the row that was modified.

The SQL statement run, and the relevant undo SQL statement.

The SQL statement run, and the new image.

Only the redo generated by the current schema.

The SQL statement run and the old image.

Question 40 of 40

I hope you like this Oracle Architecture MCQ quiz and it helps in your examination preparation. Best of Luck for the Oracle certification Examination. Please do provide feedback on it. We will also be adding more quizzes and questions in future.

Happy Learning!!!!

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