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

PMON

LGWR

SMON

ARCn

Question 1 of 40

2. 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 backup

Perform a full database logical backup

Manually switch the log files

Question 2 of 40

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

all the above are equally important

tune the database

tune the network

tune the application

Question 3 of 40

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

CLOSED

OPEN

NOMOUNT

MOUNT

RESTRICTED SESSION

Question 4 of 40

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

ALTER DATABASE OPEN READ ONLY;

ALTER DATABASE READ ONLY;

STARTUP READ ONLY;

ALTER DATABASE MOUNT READ ONLY;

Question 5 of 40

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

all of the above are in the alert log

instance startup and shutdown

creation of new database users

redo log switches

Question 6 of 40

7. 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 NEXT

ARCHIVE LOG LIST

ARCHIVE LOG STATUS

Question 7 of 40

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

Pinned buffers

Dirty buffers

Free buffers

Reuse buffers

Question 8 of 40

9. throughput is a measure of

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

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

Question 9 of 40

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

shared

restrictive

exclusive

explicit

Question 10 of 40

11. 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 the data design

tune the underlying platform

tune database operations

tune memory allocation

Question 11 of 40

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

REMOVE SCRIPT

UNCATALOG SCRIPT

ERASE SCRIPT

DELETE SCRIPT

Question 12 of 40

13. an oracle instance is made up of

sga and the init.ora

sga and data file , control files , and redo logs

sga and background process

sga , alert log, trace file

Question 13 of 40

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

BACKUPPERSET

MAXSETSIZE

FILESPERSET

FILESPERBACKUP

Question 14 of 40

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

shared pool

redo log buffer

large pool

database buffer cache

Question 15 of 40

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

LGWR

SMON

ckPt

PMON

Question 16 of 40

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

SMON

PMON

DBW0

CKPT

Question 17 of 40

18. 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=Y

DIRECT=N

IGNORE=Y

CONVENTIONAL=Y

Question 18 of 40

19. 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

21187

21184

Question 19 of 40

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

LogMiner can be used for instance recovery.

LogMiner can be used for media recovery.

LogMiner can be used by Oracle for log recovery.

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

Question 20 of 40

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

All rows in a corrupt block are inaccessible.

Only the corrupted rows within a block will be inaccessible.

Referential integrity may be violated.

Indexes pointing to corrupt blocks will be marked as invalid.

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

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

Question 21 of 40

22. An oracle database is made up of

datafiles , control files, and init.ora

datafiles , redo logs, trace files

redologs, archived redo logs, and password files

datafiles, redologs, and control files

Question 22 of 40

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

exclusive

None of the above

exclusion

unique

Question 23 of 40

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

excess segment

overflow segment

index segment

chain segment

Question 24 of 40

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

Bad

Discard

log

Control

Parameter file

Question 25 of 40

26. which of the following types of indexes stores the indexed columns values associated rowid as binary string

reverse key index

bitwise index

bitmap index

b-tree index

Question 26 of 40

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

The SQL statement run and the old image.

The SQL statement run, and the new image.

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

Only the redo generated by the current schema.

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

Question 27 of 40

28. 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

ALLOCATE

RECOVER

RESTORE

Question 28 of 40

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

The database will be restarted.

It disables the shared server.

The minimum number of shared server processes will be run.

All the existing connections will be terminated immediately.

Question 29 of 40

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

ADD archivelog

INCLUDE archivelog

PLUS archivelog

ENABLE archivelog

Question 30 of 40

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

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

The application context is not required, but recommended.

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

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

The application context is required.

Question 31 of 40

32. Among the listed recovery method types, which recovery requires the DBA to explicitly issue a recovery command?

Instance recovery

Thread recovery

Crash recovery

Media recovery

Question 32 of 40

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

large pool

shared pool

database buffer cache

redo log buffer

Question 33 of 40

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

none of the above

the data in the column has low cardinality

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

the column frequently used in sql statement where clause

Question 34 of 40

35. 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

RECOVER DATABASE

ALTER TABLESPACE END BACKUP

ALTER DATABASE DATAFILE END BACKUP

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?

RC_DATABASE

RC_BACKUP_SET

V$BACKUP_SET

V$BACKUPSET

Question 36 of 40

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

Seven days

Five days

Nine days

One day

Question 37 of 40

38. 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 38 of 40

39. 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)

SERVICE _NAME

INSTANCE_NAME.

LISTENER_NAME.

DISPATCHERS.

Question 39 of 40

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

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

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

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.

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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