Practice online oracle dba quiz

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I am presenting here the Oracle DBA quiz. I hope you like it

This Oracle DBA online test check the understanding on various topics like RMAN, Oracle Structures,Backup & recovery , Oracle Memory structure, Background processes, Dictionary views , alert logs ,oracle tablespace ,indexes , profiles and many more

The below test is randomized Oracle DBA quiz 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. You are considering using the MTS architecture on the Oracle database. Session information when shared servers are being used is stored where in the Oracle database?

Large pool area

In the buffer cache keep area

In the shared pool

In the PGA

In the redo log buffer

Question 1 of 40

2. A DBA manages a database that is operating in NOARCHIVELOG mode. Which one of the following options should he include in his backup strategy?

Whole database backup after the database is gracefully closed

Can only perform logical backups

Cannot perform any backups in this mode

Whole database backup while the database is open

Question 2 of 40

3. During regular database operation, which background process will take smaller blocks of free space in a dictionary-managed tablespace and move things around to make bigger pieces of free space?

DBW0

LGWR

ARCH

PMON

SMON

Question 3 of 40

4. A organization is taking online backups of the database, with the database operating in ARCHIVELOG mode. Due to a media failure they lost the SYSTEM tablespace data files. What must they do to recover the data files?

Shut down the database, restore the lost file, mount the database, and recover the database

Take the tablespace offline; restore the lost file, and issue the RECOVER DATAFILE command

Shut down the database, restore all the Oracle files, and open the database with the RESETLOGS option

Take the tablespace offline, restore the lost file, and issue the RECOVER TABLESPACE command

Question 4 of 40

5. Which one of the following statements is incorrect about direct-path insert operations?

It speeds up the insert operation, bypassing the buffer cache.

Direct-path insert can be implemented either in the serial mode or the parallel DML mode.

To load data using the serial mode, you must activate the direct-path insert by specifying the SERIAL hint.

Direct-path insert can be performed when using the INSERT INTO... SELECT statement.

Direct-path insert enables you to copy data from one table to another table within the same database.

Question 5 of 40

6. You are using locally managed tablespaces in Oracle. Which of the following choices best describes the way Oracle implements this feature in the database?

Using a flat file in the local directory storing the datafile

Using the data dictionary in a distributed database

Using the data dictionary on the local database

Using a bitmap in the space header segment

Question 6 of 40

7. Which of the following clauses in a create user statement restricts the number of tables a user can add to a tablespace?

default tablespace

identified by

profile

quota on

Question 7 of 40

8. You are about to drop a tablespace. Which of the following statements can be used for dropping tablespaces that contain parent tables in foreign key relationships?

alter tablespace offline immediate

drop tablespace including contents

drop tablespace cascade constraints

alter database datafile offline drop

Question 8 of 40

9. Which of the following clauses are available in alter user statements but not in create user statements?

profile

temporary tablespace

identified by

default role

Question 9 of 40

10. Which Oracle background process is responsible for providing information about the instance name associated with the service handlers and services to the listener?

LCK

PMON

SMON

CKPT

Question 10 of 40

11. Which one of the following RMAN commands is equivalent to the SQL statement ALTER DATABASE RENAME FILE ?

CATALOG

SWITCH

CHANGE

RENAME

Question 11 of 40

12. Information in the buffer cache is saved back to disk in each of the following situations except one. In which situation does this not occur?

When a time-out occurs

When the shared pool is flushed

When a checkpoint occurs

When a log switch occurs

Question 12 of 40

13. When choosing a character set and national character set, which of the following factors should not enter into consideration?

You can use variable-length multibyte character sets as both character sets on your database.

Your character set must either be US7ASCII or a superset of it.

Your national character set and character set should be closely related where possible.

Oracle supports only English-like languages as its character set for entering SQL and PL/SQL commands

Question 13 of 40

14. You want to perform some maintenance and You issue the shutdown command at 9 p.m. on a Saturday. One hours later, the database is still in the process of shutting down. Which of the following options did you most likely use in order to shut down the database?

shutdown transnational

shutdown normal

shutdown abort

shutdown immediate

Question 14 of 40

15. You issue the alter tablespace read only command against an Oracle database. Which of the following choices best describes what happens next?

Oracle puts the tablespace into read-only mode after the last user logs off.

Oracle immediately puts the tablespace into read-only mode.

Oracle returns an error.

Oracle puts the tablespace into read-only mode after the last prior transaction against that tablespace commits while preventing subsequent DML until the change happens.

Question 15 of 40

16. You need to identify the remaining free space in a tablespace. From which of the following views would you get this information most easily?

DBA_EXTENTS

V$TABLESPACE

DBA_FREE_SPACE

DBA_TABLESPACES

Question 16 of 40

17. We are designing the physical database layout on your host machine. What is the relationship between tablespaces and datafiles in the Oracle database?

One tablespace has only one datafile.

Many tablespaces can share one datafile.

One tablespace can have many datafiles.

One datafile can contain many tablespaces.

Question 17 of 40

18. After creating a new user for your Oracle database, a user still complains he or she cannot log in because of insufficient privileges errors. Which of the following actions should you take?

Reset the user's password

Grant create table privileges to the user

Unlock the user's account

Grant the CONNECT role to the user

Question 18 of 40

19. You are trying to find the ALERT file on a host machine for a database (11g and below) you have never administered before. Which of the following initialization parameters is used to identify the location of the ALERT file?

LOG_ARCHIVE_DEST

BACKGROUND_DUMP_DEST

CORE_DUMP_DEST

USER_DUMP_DEST

Question 19 of 40

20. User JOHN has create any table privilege with administrative abilities on that privilege. Which of the following statements show how to revoke the administrative component from JOHN without limiting her overall ability to create tables?

revoke create any table from JOHN; then grant create any table to JOHN;

revoke admin option from create any table; then grant create any table to JOHN;

revoke admin option from create any table;

None of these

Question 20 of 40

21. Which of the following choices lists an alter user option that can be executed by the user herself or himself?

profile

default tablespace

identified by

temporary tablespace

Question 21 of 40

22. You are analyzing how Oracle processes user statements. SQL and PL/SQL parse information is stored in which of the following database memory areas?

PGA

Dictionary cache

Library cache

Row cache

Buffer cache

Question 22 of 40

23. Which one of the following statements is true while taking tablespace backups using RMAN?

RMAN generates extra redo information during online backups when compared with user-managed online backups.

RMAN does not require the tablespace to be in backup mode

You need to keep the tablespace in backup mode explicitly.

You need to make the tablespace offline.

Question 23 of 40

24. You alter a tablespace’ s default storage settings in the Oracle database to increase the size of initial extents. Which of the following choices identifies when the change will take effect for tables that already exist in that tablespace?

The change will not take effect for existing tables.

The change takes effect immediately.

The change takes effect when data is removed from the table.

The change takes effect when data is added to the table.

Question 24 of 40

25. You issue the following statement in Oracle:
CREATE UNIQUE BITMAP INDEX empl_lastname_indx_01
ON employee (lastname ASC);
What is wrong with this statement for dictionary-managed tablespaces?

The tablespace clause must be omitted.

You cannot use the nosort keyword in creating an index.

You should omit the asc keyword.

Bitmap indexes cannot be unique.

Question 25 of 40

26. You want to find out the names and locations of all control files in your database. Which two of the following performance views would you query?

V$PARAMETER

V$CONTROLFILE_RECORD_SECTION

V$DATABASE

V$CONTROLFILE

Question 26 of 40

27. Which one of the following RMAN views must you query to view the code of an existing stored script in the recovery catalog?

RC_SOURCE_SCRIPT

RC_STORED_SCRIPT_LINE

RC_STORED_SCRIPT_CODE

RC_STORED_SCRIPT

Question 27 of 40

28. Which of the following is the init.ora parameter that indicates the size of each buffer in the buffer cache?

BUFFER_SIZE

DB_BLOCK_BUFFERS

DB_BLOCK_SIZE

ROLLBACK_SEGMENTS

Question 28 of 40

29. The location of indexes in a database and the size of those indexes is information that can be found in which of the following dictionary views?

DBA_FREES_SPACE

DBA_SEGMENTS

DBA_INDEXES

DBA_OBJECTS

Question 29 of 40

30. You are attempting to clear an unarchived redo log file. In order to manually enact a log switch, which of the following statements is appropriate?

alter system

alter database

alter user

alter redo log

Question 30 of 40

31. You are running Oracle in America in support of a financial analysis project for the government of Egypt. In order to produce reports that display money amounts as Egyptian pounds, rather than dollars, which of the following initialization parameters would be useful?

NLS_DATE_FORMAT

NLS_CURRENCY

NLS_LANG

NLS_SORT

Question 31 of 40

32. Session information when dedicated servers are being used is stored where in the Oracle database?

Large area

In the buffer cache keep area

In the redo log buffer

In the PGA

In the shared pool area

Question 32 of 40

33. You are performing the steps that will create your Oracle data dictionary. The objects in the Oracle data dictionary are part of which of the following schemas?

PUBLIC

SCOTT

SYSTEM

SYS

Question 33 of 40

34. If you wished to make it so that every user in Oracle could have only one connection to the database at a time, which of the following choices identifies how you would do it?

Set SESSIONS_PER_USER in the DEFAULT profile to 1

Set LICENSE_MAX_SESSIONS = 1 in init.ora

Set IDLE_TIME in the DEFAULT profile to 1

Set SESSIONS_PER_USER = 2 in init.ora

Question 34 of 40

35. You are implementing control file multiplexing. Which of the following choices identifies how Oracle knows the locations of the control files it is supposed to maintain?

Oracle knows automatically where to look.

Values specified for CONTROL_FILES.

Values specified for BACKGROUND_DUMP_DEST.

Values specified in V$DATABASE.

Question 35 of 40

36. A disk crashes that contains the only copies of all four of your online redo log files. How would you alter your Oracle database to prevent this from causing much damage in the future?

Change the CONTROL_FILES parameter in the init.ora file.

Create multiple members for each of your four groups and place them on different disks.

Use the alter database add LOGFILE GROUP 5;

Set LOG_BLOCK_CHECKSUM in the init.ora file.

Question 36 of 40

37. A User accidentally drops a very critical table. What kind of failure just occurred?

Process failure

Statement failure

Human error

Instance failure

Question 37 of 40

38. Records from the data dictionary information are stored in which of the following database memory areas?

Library cache

Session UGA

Buffer cache

Row cache

Question 38 of 40

39. You have assigned 10 tables to the keep pool. How should you determine the appropriate size for your keep pool?

No Answer is Correct

Based on the number of blocks in the table plus blocks in associated indexes

Based on the number of blocks in the table only

Based on the number of blocks in associated indexes only

Based on the size of your shared pool

Question 39 of 40

40. You are attempting to locate your control files on an Oracle database called TEST. In which of the following files might you look for this information?

pwdORCL.ora

utlrp.sql

control01.ctl

init.ora

Question 40 of 40

I hope you like this Oracle DBA online 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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