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. 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

cost

none of the above

hint

rule

Question 1 of 40

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

unique

exclusive

exclusion

None of the above

Question 2 of 40

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

instance startup and shutdown

creation of new database users

all of the above are in the alert log

redo log switches

Question 3 of 40

4. 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 requires 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.

Question 4 of 40

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

shared pool

large pool

database buffer cache

redo log buffer

Question 5 of 40

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

SMON

ARCn

DBWn

PMON

LGWR

Question 6 of 40

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

DELETE SCRIPT

ERASE SCRIPT

REMOVE SCRIPT

UNCATALOG SCRIPT

Question 7 of 40

8. 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 DATABASE END BACKUP

ALTER TABLESPACE END BACKUP

RECOVER DATABASE

Question 8 of 40

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

DIRECT=N

IGNORE=Y

DIRECT=Y

CONVENTIONAL=Y

Question 9 of 40

10. 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';
}

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

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

Renames the data file in the RUN block

Question 10 of 40

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

One day

Seven days

Five days

Nine days

Question 11 of 40

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

V$DATAFILE_HEADER

V$DATAFILE

V$DATAFILE_COPY

V$DATAFILE_RECOVERY

Question 12 of 40

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

database buffer cache

shared pool

redo log buffer

large pool

Question 13 of 40

14. an oracle instance is made up of

sga and the init.ora

sga , alert log, trace file

sga and data file , control files , and redo logs

sga and background process

Question 14 of 40

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

LogMiner can be used by Oracle for log recovery.

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

LogMiner can be used for instance recovery.

LogMiner can be used for media recovery.

Question 15 of 40

16. 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 16 of 40

17. which lock type is taken out when creating, dropping or altering a table

exclusive

restrictive

shared

explicit

Question 17 of 40

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

PMON

ckPt

LGWR

SMON

Question 18 of 40

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

v$sesstat

v$sgastat

v$statname

v$systat

Question 19 of 40

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

The minimum number of shared server processes will be run.

It disables the shared server.

The database will be restarted.

All the existing connections will be terminated immediately.

Question 20 of 40

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

SMON

CKPT

DBW0

LGWR

Question 21 of 40

22. throughput is a measure of

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

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

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

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

Question 22 of 40

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

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

Only the redo generated by the current schema.

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

The SQL statement run, and the new image.

The SQL statement run and the old image.

Question 23 of 40

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

All rows in a corrupt block are inaccessible.

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

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.

Only the corrupted rows within a block will be inaccessible.

Question 24 of 40

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

MAXSETSIZE

FILESPERBACKUP

FILESPERSET

BACKUPPERSET

Question 25 of 40

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

the column frequently used in sql statement where clause

none of the above

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

the data in the column has low cardinality

Question 26 of 40

27. 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 27 of 40

28. response time is a measure of

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 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

Question 28 of 40

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

Manually switch the log files

Shutdown normal and restart the database

Perform a full database logical backup

Perform a full database backup

Question 29 of 40

30. 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

None of the above

Conventional path load

Question 30 of 40

31. 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?

RECOVER

RESTORE

ALLOCATE

REINSTATE

Question 31 of 40

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

sqlnet.ora, names.ora

sqlnet.ora

sqlnet.ora, tnsnames.ora

host.ora, tnsnames.ora

tnsnames.ora, sqlnet.ora, host.ora

Question 32 of 40

33. 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?

21180

21187

21190

21184

Question 33 of 40

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

RMAN>CONFIGURE CONTROLFILE AUTO ON;

RMAN>CONFIGURE CONTROLFILE AUTOBACKUP ON;

RMAN>SHOW ALL;

RMAN>CONFIGURE CONTROLFILE BACKUP AUTO;

RMAN>CONTROLFILE AUTO BACKUP;

Question 34 of 40

35. 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 has already been archived.

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

Question 35 of 40

36. Which one of the following views must you query from the recovery catalog database to obtain information about the backup sets that were created using RMAN?

V$BACKUP_SET

RC_BACKUP_SET

RC_DATABASE

V$BACKUPSET

Question 36 of 40

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

Control

log

Discard

Parameter file

Bad

Question 37 of 40

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

overflow segment

chain segment

excess segment

index segment

Question 38 of 40

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

all the above are equally important

tune the network

tune the database

tune the application

Question 39 of 40

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

Free buffers

Pinned buffers

Reuse buffers

Dirty buffers

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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