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

CONVENTIONAL=Y

DIRECT=Y

IGNORE=Y

Question 1 of 40

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

DBWn

PMON

ARCn

LGWR

SMON

Question 2 of 40

3. 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?

RECOVER DATABASE

ALTER DATABASE DATAFILE END BACKUP

ALTER TABLESPACE END BACKUP

ALTER DATABASE END BACKUP

Question 3 of 40

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

RMAN>CONTROLFILE AUTO BACKUP;

RMAN>CONFIGURE CONTROLFILE AUTOBACKUP ON;

RMAN>CONFIGURE CONTROLFILE AUTO ON;

RMAN>SHOW ALL;

RMAN>CONFIGURE CONTROLFILE BACKUP AUTO;

Question 4 of 40

5. 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

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

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

Question 5 of 40

6. 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?

Advanced network option

Connection Manager

Intelligent agent

Security server

Question 6 of 40

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

bitmap index

reverse key index

b-tree index

bitwise index

Question 7 of 40

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

Nine days

Five days

One day

Seven days

Question 8 of 40

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

v$systat

v$sgastat

v$sesstat

v$statname

Question 9 of 40

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

PMON

CKPT

SMON

DBW0

Question 10 of 40

11. an oracle instance is made up of

sga , alert log, trace file

sga and background process

sga and data file , control files , and redo logs

sga and the init.ora

Question 11 of 40

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

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

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

The SQL statement run and the old image.

The SQL statement run, and the new image.

Only the redo generated by the current schema.

Question 12 of 40

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

Free buffers

Reuse buffers

Dirty buffers

Pinned buffers

Question 13 of 40

14. 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?

21184

21187

21180

21190

Question 14 of 40

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

CKPT

LGWR

SMON

DBW0

Question 15 of 40

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

shared pool

database buffer cache

redo log buffer

large pool

Question 16 of 40

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

dba_tab_privs

dba_table_size

dba_tables

dba_objects

Question 17 of 40

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

all of the above are in the alert log

redo log switches

creation of new database users

instance startup and shutdown

Question 18 of 40

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

Distributed path load

Conventional path load

Direct path load

None of the above

Question 19 of 40

20. 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 database will be restarted.

It disables the shared server.

The minimum number of shared server processes will be run.

Question 20 of 40

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

tune the database

tune the application

tune the network

all the above are equally important

Question 21 of 40

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

Restore the control files.

Perform a full backup.

Restore the archived redo log files.

Open the database in NOMOUNT mode.

Question 22 of 40

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

large pool

redo log buffer

database buffer cache

shared pool

Question 23 of 40

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

DELETE SCRIPT

REMOVE SCRIPT

UNCATALOG SCRIPT

ERASE SCRIPT

Question 24 of 40

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

LogMiner can be used for instance recovery.

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

LogMiner can be used by Oracle for log recovery.

LogMiner can be used for media recovery.

Question 25 of 40

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

unique

None of the above

exclusive

exclusion

Question 26 of 40

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

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.

All rows in a corrupt block are inaccessible.

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

Only the corrupted rows within a block will be inaccessible.

Question 27 of 40

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

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

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

The application context is required.

The application context is not required, but recommended.

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

Question 28 of 40

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

index segment

chain segment

excess segment

overflow segment

Question 29 of 40

30. throughput is a measure of

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

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 30 of 40

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

Back up the online redo log files.

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

Shut down the database gracefully and restart.

Execute the ALTER SYSTEM CHECKPOINT command.

Question 31 of 40

32. 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.

INSTANCE_NAME.

DISPATCHERS.

SERVICE _NAME

Question 32 of 40

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

tnsnames.ora, sqlnet.ora, host.ora

sqlnet.ora

sqlnet.ora, names.ora

host.ora, tnsnames.ora

sqlnet.ora, tnsnames.ora

Question 33 of 40

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

ALTER DATABASE READ ONLY;

ALTER DATABASE OPEN READ ONLY;

STARTUP READ ONLY;

ALTER DATABASE MOUNT READ ONLY;

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

none of the above

hint

rule

cost

Question 35 of 40

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

Control

Bad

Discard

log

Parameter file

Question 36 of 40

37. 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?

RESTORE

REINSTATE

ALLOCATE

RECOVER

Question 37 of 40

38. An oracle database is made up of

datafiles , redo logs, trace files

redologs, archived redo logs, and password files

datafiles, redologs, and control files

datafiles , control files, and init.ora

Question 38 of 40

39. 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 39 of 40

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

the data in the column has low cardinality

none of the above

the column frequently used in sql statement where clause

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

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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