Practice online oracle dba quiz

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 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 abort

shutdown transnational

shutdown immediate

shutdown normal

Question 1 of 40

2. 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?

Values specified for BACKGROUND_DUMP_DEST.

Oracle knows automatically where to look.

Values specified for CONTROL_FILES.

Values specified in V$DATABASE.

Question 2 of 40

3. 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

Cannot perform any backups in this mode

Can only perform logical backups

Whole database backup while the database is open

Question 3 of 40

4. 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 log switch occurs

When a time-out occurs

When the shared pool is flushed

When a checkpoint occurs

Question 4 of 40

5. As the DBA, you are attempting to limit user's misuse of Oracle's ability to use host machine resources. Which of the following features of the Oracle database is useful for this purpose?

Profiles

Roles

Parameter files

Undo segments

Question 5 of 40

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

SMON

PMON

LCK

CKPT

Question 6 of 40

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

DB_BLOCK_SIZE

BUFFER_SIZE

DB_BLOCK_BUFFERS

ROLLBACK_SEGMENTS

Question 7 of 40

8. 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.

One datafile can contain many tablespaces.

Many tablespaces can share one datafile.

One tablespace can have many datafiles.

Question 8 of 40

9. 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_FREE_SPACE

V$TABLESPACE

DBA_EXTENTS

DBA_TABLESPACES

Question 9 of 40

10. The best choice for decreasing size requirements for tables that need only be accessed via the primary key in oracle is which of the following?

Increase the PCTFREE value set for table blocks.

Drop the primary key

Create more indexes on the table.

Create an index-organized table to store the data.

Question 10 of 40

11. 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_SORT

NLS_CURRENCY

NLS_LANG

NLS_DATE_FORMAT

Question 11 of 40

12. 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 all the Oracle files, and open the database with the RESETLOGS option

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

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

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

Question 12 of 40

13. 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?

drop tablespace cascade constraints

alter database datafile offline drop

drop tablespace including contents

alter tablespace offline immediate

Question 13 of 40

14. Your Oracle EMP table contains many unique values in the FIRST_NAME column. You want to index that column to take advantage of this fact in query access. Which of the following indexes might you use?

reverse key index

Function-based index

Bitmap Index

Simple B-tree index

Question 14 of 40

15. You are analyzing the components of the redo log mechanisms in your Oracle database. Which of the following purposes does the CKPT process serve?

Writes current redo log number to datafile headers

Reads information into memory for users

Writes redo log information to disk

Writes dirty buffers to disk

Question 15 of 40

16. 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?

PMON

ARCH

SMON

DBW0

LGWR

Question 16 of 40

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

default tablespace

temporary tablespace

identified by

profile

Question 17 of 40

18. You are defining storage for various segment types in the Oracle database. Which of the following is not a valid type of segment in Oracle?

Sequence segment

Undo segment

Temporary segment

Data segment

Question 18 of 40

19. 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?

Grant the CONNECT role to the user

Unlock the user's account

Grant create table privileges to the user

Reset the user's password

Question 19 of 40

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

Buffer cache

Session UGA

Row cache

Library cache

Question 20 of 40

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

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

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

Question 21 of 40

22. You are working in an organization which is situated in many countries. You maintain databases in multiple countries in multiple languages. To determine the date conventions for a database in a particular country, you might use which of the following database views?

V$NLS_VALID_VALUES

V$NLS_PARAMETERS

DBA_DATES

NLS_DATE_FORMAT

Question 22 of 40

23. You attempt to issue the alter tablespace rename datafile command in the Oracle database. Which of the following choices indicates a step that must take place after this command is issued?

Physically move the datafile to the new location

Execute IMPORT to load the new metadata

Bring the tablespace online

Bring the tablespace offline

Question 23 of 40

24. Which one of the following statements is incorrect with respect to RMAN's CROSSCHECK command?

RMAN crosschecks the availability of the backup sets by verifying the information stored in its repository with the backup sets that are physically available.

It updates the non-availability of the files by updating the information in the recovery catalog with the appropriate status.

RMAN automatically deletes information pertaining to the image copy from the repository if it is physically not available.

It identifies the backup sets or image copies that are either corrupted or have been accidentally deleted.

Question 24 of 40

25. 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?

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

Change the CONTROL_FILES parameter in the init.ora file.

Use the alter database add LOGFILE GROUP 5;

Set LOG_BLOCK_CHECKSUM in the init.ora file.

Question 25 of 40

26. 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_CODE

RC_STORED_SCRIPT_LINE

RC_STORED_SCRIPT

Question 26 of 40

27. You are processing an update statement. At what point in SQL statement processing is the data change actually made to block buffers?

When the cursor is opened

When the statement is executed

When the statement is parsed

When data is fetched from the cursor

Question 27 of 40

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

Large area

In the shared pool area

In the redo log buffer

In the PGA

In the buffer cache keep area

Question 28 of 40

29. On an Oracle server installation, which of the following reorganizations of your indexes would be appropriate in order to improve performance of queries on tables containing all words in the dictionary starting with the letter 'S'?

Convert your reverse-key index to a B-tree index.

Convert your B-tree index to a reverse-key index.

Convert your B-tree index to a bitmap index.

Convert your bitmap index to a B-tree index.

Question 29 of 40

30. 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?

SCOTT

SYS

PUBLIC

SYSTEM

Question 30 of 40

31. 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$CONTROLFILE_RECORD_SECTION

V$CONTROLFILE

V$PARAMETER

V$DATABASE

Question 31 of 40

32. 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 prior transaction against that tablespace commits while preventing subsequent DML until the change happens.

Oracle immediately puts the tablespace into read-only mode.

Oracle returns an error.

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

Question 32 of 40

33. The DBA issues the following statement:
CREATE USER APPLDBA
IDENTIFIED BY APPLDBA;
What profile will user APPLDBA have?

None

DEFAULT

CONNECT

DBA

Question 33 of 40

34. 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?

utlrp.sql

init.ora

pwdORCL.ora

control01.ctl

Question 34 of 40

35. 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 the data dictionary in a distributed database

Using a flat file in the local directory storing the datafile

Using a bitmap in the space header segment

Using the data dictionary on the local database

Question 35 of 40

36. 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 36 of 40

37. 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 redo log buffer

In the PGA

In the buffer cache keep area

In the shared pool

Question 37 of 40

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

SWITCH

CHANGE

CATALOG

RENAME

Question 38 of 40

39. When we issue the commit statement in the session, which of the following things will not occur?

Acquired undo segment locks are released.

Redo entry generated for committed transaction.

Acquired row or table locks are released.

Cached data is saved immediately to disk.

Question 39 of 40

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

temporary tablespace

default role

identified by

profile

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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