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 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

control01.ctl

init.ora

pwdORCL.ora

Question 1 of 40

2. 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 IDLE_TIME in the DEFAULT profile to 1

Set SESSIONS_PER_USER in the DEFAULT profile to 1

Set SESSIONS_PER_USER = 2 in init.ora

Set LICENSE_MAX_SESSIONS = 1 in init.ora

Question 2 of 40

3. 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 3 of 40

4. 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 4 of 40

5. 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 bitmap in the space header segment

Using the data dictionary in a distributed database

Using a flat file in the local directory storing the datafile

Using the data dictionary on the local database

Question 5 of 40

6. 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.

Create more indexes on the table.

Drop the primary key

Create an index-organized table to store the data.

Question 6 of 40

7. 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

Library cache

Buffer cache

Dictionary cache

Row cache

Question 7 of 40

8. The user is selecting data from the Oracle database. Which of the following processes handles obtaining data from Oracle for that user?

The DBW0 process obtains information for the user

The server process obtains information for the user.

The listener process obtains information for the user.

The user process obtains information on its own.

Question 8 of 40

9. 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?

SYS

SYSTEM

SCOTT

PUBLIC

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

SMON

PMON

CKPT

Question 10 of 40

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

identified by

profile

default role

temporary tablespace

Question 11 of 40

12. 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?

Unlock the user's account

Grant the CONNECT role to the user

Grant create table privileges to the user

Reset the user's password

Question 12 of 40

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

V$TABLESPACE

DBA_TABLESPACES

DBA_EXTENTS

DBA_FREE_SPACE

Question 13 of 40

14. 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

V$DATABASE

V$CONTROLFILE_RECORD_SECTION

Question 14 of 40

15. 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 when data is removed from the table.

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

The change takes effect immediately.

Question 15 of 40

16. 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 B-tree index to a bitmap index.

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

Convert your bitmap index to a B-tree index.

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

Question 16 of 40

17. To allocate another role to a user, which command is most appropriate?

alter system

alter database

alter user

grant

Question 17 of 40

18. 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?

None of these

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

revoke admin option from create any table;

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

Question 18 of 40

19. 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.

Cached data is saved immediately to disk.

Acquired row or table locks are released.

Question 19 of 40

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

RC_STORED_SCRIPT_CODE

RC_STORED_SCRIPT

RC_STORED_SCRIPT_LINE

RC_SOURCE_SCRIPT

Question 20 of 40

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

quota on

default tablespace

identified by

profile

Question 21 of 40

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

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.

Oracle immediately puts the tablespace into read-only mode.

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

Question 22 of 40

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

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

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.

Question 23 of 40

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

Reads information into memory for users

Writes current redo log number to datafile headers

Writes dirty buffers to disk

Writes redo log information to disk

Question 24 of 40

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

When data is fetched from the cursor

When the statement is executed

When the cursor is opened

When the statement is parsed

Question 25 of 40

26. 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?

You cannot use the nosort keyword in creating an index.

You should omit the asc keyword.

Bitmap indexes cannot be unique.

The tablespace clause must be omitted.

Question 26 of 40

27. 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_LANG

NLS_DATE_FORMAT

NLS_CURRENCY

NLS_SORT

Question 27 of 40

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

Buffer cache

Session UGA

Library cache

Row cache

Question 28 of 40

29. 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 database datafile offline drop

drop tablespace including contents

alter tablespace offline immediate

drop tablespace cascade constraints

Question 29 of 40

30. Which of the following operations do not require Oracle to store information in an undo segment as part of the transaction?

delete

update

insert

select

Question 30 of 40

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

Can only perform logical backups

Cannot perform any backups in this mode

Whole database backup after the database is gracefully closed

Whole database backup while the database is open

Question 31 of 40

32. You are identifying dictionary objects in the Oracle database. Which of the following is a view in the data dictionary?

V$DATABASE

EMP

SYS.AUD$

DBA_TABLES

Question 32 of 40

33. 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 database

alter redo log

alter system

alter user

Question 33 of 40

34. You are adding redo logs to the Oracle database. Creating a new redo log adds information to which of the following Oracle resources?

SGA

Shared pool

Control file

Library cache

Question 34 of 40

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

One datafile can contain many tablespaces.

One tablespace can have many datafiles.

Many tablespaces can share one datafile.

One tablespace has only one datafile.

Question 35 of 40

36. 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?

BACKGROUND_DUMP_DEST

LOG_ARCHIVE_DEST

USER_DUMP_DEST

CORE_DUMP_DEST

Question 36 of 40

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

You need to make the tablespace offline.

RMAN does not require the tablespace to be in backup mode

You need to keep the tablespace in backup mode explicitly.

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

Question 37 of 40

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

DB_BLOCK_SIZE

ROLLBACK_SEGMENTS

DB_BLOCK_BUFFERS

BUFFER_SIZE

Question 38 of 40

39. You need to remove a column from the database. Which of the following choices best identifies how to do so if your objective is to quickly execute the task without necessarily freeing up space in your tablespace?

alter table drop column

alter table set unused column

alter table modify column

truncate table

Question 39 of 40

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

Based on the size of your shared pool

Based on the number of blocks in associated indexes only

Based on the number of blocks in the table only

No Answer is Correct

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

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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