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.

1. 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 DATAFILE END BACKUP

ALTER TABLESPACE END BACKUP

ALTER DATABASE END BACKUP

RECOVER DATABASE

Question 1 of 40

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

v$systat

v$sesstat

v$sgastat

v$statname

Question 2 of 40

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

Restore the archived redo log files.

Perform a full backup.

Restore the control files.

Open the database in NOMOUNT mode.

Question 3 of 40

4. Which one of the following views would you query to obtain information about data files that need recovery?

V$DATAFILE_COPY

V$DATAFILE_HEADER

V$DATAFILE_RECOVERY

V$DATAFILE

Question 4 of 40

5. which of the following components of SGA caches recently accessed data , index and rollback block

shared pool

large pool

redo log buffer

database buffer cache

Question 5 of 40

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

CKPT

SMON

DBW0

PMON

Question 6 of 40

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

RMAN>CONFIGURE CONTROLFILE AUTO ON;

RMAN>CONFIGURE CONTROLFILE BACKUP AUTO;

RMAN>CONFIGURE CONTROLFILE AUTOBACKUP ON;

RMAN>CONTROLFILE AUTO BACKUP;

RMAN>SHOW ALL;

Question 7 of 40

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

redo log switches

all of the above are in the alert log

instance startup and shutdown

creation of new database users

Question 8 of 40

9. increasing the size of the system global area in order to improve performance is an example of which step in the oracle tuning methodology

tune memory allocation

tune database operations

tune the data design

tune the underlying platform

Question 9 of 40

10. Which one of the following options would you use with RMAN to back up archive log files along with other files?

INCLUDE archivelog

ENABLE archivelog

ADD archivelog

PLUS archivelog

Question 10 of 40

11. 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.

INSTANCE_NAME.

SERVICE _NAME

LISTENER_NAME.

Question 11 of 40

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

Perform a full database logical backup

Shutdown normal and restart the database

Manually switch the log files

Perform a full database backup

Question 12 of 40

13. 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 13 of 40

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

Dirty buffers

Pinned buffers

Free buffers

Reuse buffers

Question 14 of 40

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

Control

Discard

log

Parameter file

Bad

Question 15 of 40

16. response time is a measure of

the time it takes for a single user to receive a result set back when working form within a application

how long it takes for oracle to find data without using an index

how fast user’s pc can refresh the screen with new data

how much processing the system can do during a given amount of time

Question 16 of 40

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

Only the corrupted rows within a block will be inaccessible.

Indexes pointing to corrupt blocks will be marked as invalid.

Referential integrity may be violated.

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

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

All rows in a corrupt block are inaccessible.

Question 17 of 40

18. an oracle instance is made up of

sga and the init.ora

sga and data file , control files , and redo logs

sga , alert log, trace file

sga and background process

Question 18 of 40

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

FILESPERBACKUP

MAXSETSIZE

BACKUPPERSET

FILESPERSET

Question 19 of 40

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

Nine days

Seven days

Five days

One day

Question 20 of 40

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

Distributed path load

Direct path load

Conventional path load

None of the above

Question 21 of 40

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

REMOVE SCRIPT

ERASE SCRIPT

DELETE SCRIPT

UNCATALOG SCRIPT

Question 22 of 40

23. throughput is a measure of

how long it takes for oracle to find data without using an index

how much processing the system can do during a given amount of time

the time it takes for a single user to receive a result set back when working from within the application

how fast a user’s pc can refresh the screen with new data

Question 23 of 40

24. An oracle database is made up of

datafiles, redologs, and control files

redologs, archived redo logs, and password files

datafiles , redo logs, trace files

datafiles , control files, and init.ora

Question 24 of 40

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

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

The SQL statement run and the old image.

The SQL statement run, and the new image.

Only the redo generated by the current schema.

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

Question 25 of 40

26. Which one of the following configuration files can be used to implement the host naming method?

sqlnet.ora

sqlnet.ora, names.ora

host.ora, tnsnames.ora

tnsnames.ora, sqlnet.ora, host.ora

sqlnet.ora, tnsnames.ora

Question 26 of 40

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

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

The application context is required.

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

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

The application context is not required, but recommended.

Question 27 of 40

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

SMON

PMON

DBWn

ARCn

LGWR

Question 28 of 40

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

OPEN

MOUNT

RESTRICTED SESSION

CLOSED

NOMOUNT

Question 29 of 40

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

Shut down the database gracefully and restart.

Back up the online redo log files.

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.

Question 30 of 40

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

All the existing connections will be terminated immediately.

The minimum number of shared server processes will be run.

The database will be restarted.

It disables the shared server.

Question 31 of 40

32. 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?

Security server

Connection Manager

Intelligent agent

Advanced network option

Question 32 of 40

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

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

Question 33 of 40

34. 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?

21187

21184

21180

21190

Question 34 of 40

35. 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

rule

none of the above

hint

cost

Question 35 of 40

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

IGNORE=Y

CONVENTIONAL=Y

DIRECT=N

DIRECT=Y

Question 36 of 40

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

none of the above

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

the column frequently used in sql statement where clause

the data in the column has low cardinality

Question 37 of 40

38. which of the following lock type is the most restrictive

exclusive

None of the above

unique

exclusion

Question 38 of 40

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

SMON

LGWR

ckPt

PMON

Question 39 of 40

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

ARCHIVE LOG REPORT

ARCHIVE LOG LIST

ARCHIVE LOG STATUS

ARCHIVE LOG NEXT

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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