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. 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.

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

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.

Question 1 of 40

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

You need to keep the tablespace in backup mode explicitly.

You need to make the tablespace offline.

RMAN does not require the tablespace to be in backup mode

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

Question 2 of 40

3. 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 3 of 40

4. 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

ARCH

LGWR

PMON

SMON

Question 4 of 40

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

Large area

In the PGA

In the shared pool area

In the redo log buffer

In the buffer cache keep area

Question 5 of 40

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

BUFFER_SIZE

ROLLBACK_SEGMENTS

DB_BLOCK_SIZE

DB_BLOCK_BUFFERS

Question 6 of 40

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

update

insert

select

delete

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 listener process obtains information for the user.

The DBW0 process obtains information for the user

The user process obtains information on its own.

The server process obtains information for the user.

Question 8 of 40

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

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

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

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

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

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

Question 9 of 40

10. 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 10 of 40

11. You issue the following statement from SQL*Plus: startup mount. Where does Oracle obtain values for starting the instance?

From the default settings for the tablespace

From Oracle default values in OS

From the default settings in your redo log file

From your init.ora file or spfile

Question 11 of 40

12. 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?

Bring the tablespace offline

Execute IMPORT to load the new metadata

Bring the tablespace online

Physically move the datafile to the new location

Question 12 of 40

13. 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 13 of 40

14. 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 create table privileges to the user

Unlock the user's account

Reset the user's password

Grant the CONNECT role to the user

Question 14 of 40

15. 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?

Bitmap indexes cannot be unique.

You cannot use the nosort keyword in creating an index.

You should omit the asc keyword.

The tablespace clause must be omitted.

Question 15 of 40

16. 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 admin option from create any table;

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

None of these

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

Question 16 of 40

17. 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.

Create an index-organized table to store the data.

Drop the primary key

Question 17 of 40

18. 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_PARAMETERS

DBA_DATES

V$NLS_VALID_VALUES

NLS_DATE_FORMAT

Question 18 of 40

19. 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

PUBLIC

SYS

SYSTEM

Question 19 of 40

20. 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 takes effect immediately.

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

The change will not take effect for existing tables.

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

Question 20 of 40

21. 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$DATABASE

V$CONTROLFILE_RECORD_SECTION

V$CONTROLFILE

Question 21 of 40

22. 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.

Set LOG_BLOCK_CHECKSUM 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;

Question 22 of 40

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

CKPT

PMON

SMON

LCK

Question 23 of 40

24. Which of the following choices identifies a constraint on performing alter tablespace resize operation if the intended size of the tablespace is larger than the tablespace’ s current size?

Presence of objects in the datafile resized

Whether AUTOEXTEND is in use on datafiles for the tablespace

Availability of space in memory for temporary storage of blocks in tablespace

Availability of space on disk where datafiles are added

Question 24 of 40

25. 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 LICENSE_MAX_SESSIONS = 1 in init.ora

Set SESSIONS_PER_USER = 2 in init.ora

Set IDLE_TIME in the DEFAULT profile to 1

Set SESSIONS_PER_USER in the DEFAULT profile to 1

Question 25 of 40

26. 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_LANG

NLS_DATE_FORMAT

NLS_CURRENCY

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 statement is parsed

When data is fetched from the cursor

When the cursor is opened

When the statement is executed

Question 27 of 40

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

profile

default tablespace

temporary tablespace

identified by

Question 28 of 40

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

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

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

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.

Question 29 of 40

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

V$DATABASE

EMP

DBA_TABLES

SYS.AUD$

Question 30 of 40

31. 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_OBJECTS

DBA_SEGMENTS

DBA_INDEXES

DBA_FREES_SPACE

Question 31 of 40

32. 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 the shared pool is flushed

When a log switch occurs

When a checkpoint occurs

When a time-out occurs

Question 32 of 40

33. 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?

Parameter files

Roles

Undo segments

Profiles

Question 33 of 40

34. Which two of the following items are required for killing a user session?

Password

SID

Username

Serial number

Question 34 of 40

35. 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

Buffer cache

Row cache

Question 35 of 40

36. 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 on the local database

Using a bitmap in the space header segment

Using the data dictionary in a distributed database

Question 36 of 40

37. 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 bitmap 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 reverse-key index to a B-tree index.

Question 37 of 40

38. 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.

Values specified in V$DATABASE.

Oracle knows automatically where to look.

Values specified for CONTROL_FILES.

Question 38 of 40

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

DEFAULT

None

CONNECT

DBA

Question 39 of 40

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

Process failure

Statement failure

Human error

Instance failure

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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