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. 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

DIRECT=Y

IGNORE=Y

CONVENTIONAL=Y

Question 1 of 40

2. throughput 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 from within the application

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

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

Question 2 of 40

3. 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';
}

Renames the data file in the RUN block

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

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

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

Question 3 of 40

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

None of the above

Distributed path load

Conventional path load

Direct path load

Question 4 of 40

5. 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 5 of 40

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

SMON

DBW0

CKPT

PMON

Question 6 of 40

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

INCLUDE archivelog

ADD archivelog

ENABLE archivelog

PLUS archivelog

Question 7 of 40

8. 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

21187

21184

21180

Question 8 of 40

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

all the above are equally important

tune the application

tune the network

tune the database

Question 9 of 40

10. 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

Intelligent agent

Connection Manager

Advanced network option

Question 10 of 40

11. 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 is built into each application.

The application context is required.

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

Question 11 of 40

12. 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

FILESPERBACKUP

FILESPERSET

Question 12 of 40

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

ERASE SCRIPT

UNCATALOG SCRIPT

DELETE SCRIPT

REMOVE SCRIPT

Question 13 of 40

14. which dba view would show storage, row, and block information for an table

dba_tables

dba_objects

dba_table_size

dba_tab_privs

Question 14 of 40

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

log

Control

Bad

Parameter file

Discard

Question 15 of 40

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

OPEN

CLOSED

NOMOUNT

MOUNT

RESTRICTED SESSION

Question 16 of 40

17. an oracle instance is made up of

sga and background process

sga and data file , control files , and redo logs

sga and the init.ora

sga , alert log, trace file

Question 17 of 40

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

Perform a full database backup

Perform a full database logical backup

Shutdown normal and restart the database

Manually switch the log files

Question 18 of 40

19. 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 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

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

Question 19 of 40

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

V$DATAFILE_RECOVERY

V$DATAFILE_HEADER

V$DATAFILE

V$DATAFILE_COPY

Question 20 of 40

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

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.

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

Question 21 of 40

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

BLOB

BFILE

CLOB

NCLOB

Question 22 of 40

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

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

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.

Question 23 of 40

24. 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 24 of 40

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

RMAN>CONFIGURE CONTROLFILE AUTOBACKUP ON;

RMAN>CONFIGURE CONTROLFILE BACKUP AUTO;

RMAN>CONTROLFILE AUTO BACKUP;

RMAN>SHOW ALL;

RMAN>CONFIGURE CONTROLFILE AUTO ON;

Question 25 of 40

26. 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 26 of 40

27. 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 memory allocation

tune the underlying platform

tune database operations

Question 27 of 40

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

PMON

ckPt

SMON

LGWR

Question 28 of 40

29. 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 29 of 40

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

It disables the shared server.

The database will be restarted.

The minimum number of shared server processes will be run.

All the existing connections will be terminated immediately.

Question 30 of 40

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

Media recovery

Thread recovery

Instance recovery

Crash recovery

Question 31 of 40

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

ARCHIVE LOG NEXT

ARCHIVE LOG REPORT

ARCHIVE LOG LIST

ARCHIVE LOG STATUS

Question 32 of 40

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

bitmap index

reverse key index

bitwise index

b-tree index

Question 33 of 40

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

Reuse buffers

Free buffers

Dirty buffers

Pinned buffers

Question 34 of 40

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

ARCn

SMON

LGWR

PMON

DBWn

Question 35 of 40

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

exclusive

explicit

shared

restrictive

Question 36 of 40

37. 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 DATABASE DATAFILE END BACKUP

ALTER TABLESPACE END BACKUP

Question 37 of 40

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

Perform a full backup.

Open the database in NOMOUNT mode.

Restore the archived redo log files.

Restore the control files.

Question 38 of 40

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

index segment

excess segment

overflow segment

chain segment

Question 39 of 40

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

v$statname

v$sesstat

v$sgastat

v$systat

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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