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

It disables the shared server.

All the existing connections will be terminated immediately.

The database will be restarted.

The minimum number of shared server processes will be run.

Question 1 of 40

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

bitwise index

bitmap index

b-tree index

reverse key index

Question 2 of 40

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to have more than one service associated with it, the connect descriptor SID parameter in the tnsnames.ora file has been replaced by which two parameters?(Choose two)

LISTENER_NAME.

DISPATCHERS.

INSTANCE_NAME.

SERVICE _NAME

Question 3 of 40

4. 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_BACKUP_SET

V$BACKUPSET

RC_DATABASE

V$BACKUP_SET

Question 4 of 40

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

shared pool

redo log buffer

database buffer cache

large pool

Question 5 of 40

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

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 does not require 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 6 of 40

7. 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.

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

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.

Question 7 of 40

8. 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 database operations

tune the underlying platform

tune the data design

tune memory allocation

Question 8 of 40

9. 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 9 of 40

10. 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?

ALLOCATE

RECOVER

REINSTATE

RESTORE

Question 10 of 40

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

BLOB

CLOB

NCLOB

BFILE

Question 11 of 40

12. response time is a measure of

how fast 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 form within a application

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

Question 12 of 40

13. 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.

Restore the control files.

Perform a full backup.

Restore the archived redo log files.

Question 13 of 40

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

RMAN>CONFIGURE CONTROLFILE AUTOBACKUP ON;

RMAN>SHOW ALL;

RMAN>CONFIGURE CONTROLFILE BACKUP AUTO;

RMAN>CONTROLFILE AUTO BACKUP;

RMAN>CONFIGURE CONTROLFILE AUTO ON;

Question 14 of 40

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

excess segment

index segment

chain segment

overflow segment

Question 15 of 40

16. 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

the data in the column has low cardinality

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

none of the above

Question 16 of 40

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

redo log buffer

shared pool

large pool

database buffer cache

Question 17 of 40

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

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

Back up the online redo log files.

Shut down the database gracefully and restart.

Execute the ALTER SYSTEM CHECKPOINT command.

Question 18 of 40

19. 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 TABLESPACE END BACKUP

RECOVER DATABASE

ALTER DATABASE DATAFILE END BACKUP

Question 19 of 40

20. 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';
}

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

Renames the data file in the RUN block

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

Question 20 of 40

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

LGWR

SMON

ckPt

PMON

Question 21 of 40

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

dba_table_size

dba_objects

dba_tab_privs

dba_tables

Question 22 of 40

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

RESTRICTED SESSION

MOUNT

CLOSED

NOMOUNT

OPEN

Question 23 of 40

24. An oracle database is made up of

datafiles , redo logs, trace files

datafiles, redologs, and control files

datafiles , control files, and init.ora

redologs, archived redo logs, and password files

Question 24 of 40

25. 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

hint

cost

none of the above

Question 25 of 40

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

V$DATAFILE

V$DATAFILE_HEADER

V$DATAFILE_COPY

V$DATAFILE_RECOVERY

Question 26 of 40

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

REMOVE SCRIPT

DELETE SCRIPT

ERASE SCRIPT

UNCATALOG SCRIPT

Question 27 of 40

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

Thread recovery

Crash recovery

Media recovery

Instance recovery

Question 28 of 40

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

None of the above

exclusive

exclusion

unique

Question 29 of 40

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

Perform a full database logical backup

Manually switch the log files

Perform a full database backup

Shutdown normal and restart the database

Question 30 of 40

31. 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 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?

Intelligent agent

Security server

Advanced network option

Connection Manager

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

21184

21187

21190

Question 33 of 40

34. 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 34 of 40

35. 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.

The application context is required.

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

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

Question 35 of 40

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

PMON

SMON

DBW0

CKPT

Question 36 of 40

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

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

LogMiner can be used for instance recovery.

LogMiner can be used by Oracle for log recovery.

LogMiner can be used for media recovery.

Question 37 of 40

38. 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 38 of 40

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

Dirty buffers

Pinned buffers

Reuse buffers

Free buffers

Question 39 of 40

40. throughput is a measure of

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

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

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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