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. 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_FREES_SPACE

DBA_SEGMENTS

DBA_INDEXES

Question 1 of 40

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

Human error

Process failure

Statement failure

Instance failure

Question 2 of 40

3. 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 should omit the asc keyword.

The tablespace clause must be omitted.

You cannot use the nosort keyword in creating an index.

Bitmap indexes cannot be unique.

Question 3 of 40

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

In the redo log buffer

In the PGA

In the shared pool area

Large area

In the buffer cache keep area

Question 4 of 40

5. 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

V$NLS_VALID_VALUES

DBA_DATES

NLS_DATE_FORMAT

Question 5 of 40

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

Acquired undo segment locks are released.

Cached data is saved immediately to disk.

Redo entry generated for committed transaction.

Acquired row or table locks are released.

Question 6 of 40

7. 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 the data dictionary on the local database

Using a bitmap in the space header segment

Question 7 of 40

8. 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 performed when using the INSERT INTO... SELECT statement.

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 enables you to copy data from one table to another table within the same database.

Question 8 of 40

9. 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_CURRENCY

NLS_LANG

NLS_DATE_FORMAT

NLS_SORT

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?

Create more indexes on the table.

Create an index-organized table to store the data.

Drop the primary key

Increase the PCTFREE value set for table blocks.

Question 10 of 40

11. 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 when data is added to the table.

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.

Question 11 of 40

12. 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 in V$DATABASE.

Values specified for BACKGROUND_DUMP_DEST.

Oracle knows automatically where to look.

Values specified for CONTROL_FILES.

Question 12 of 40

13. 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 13 of 40

14. 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 a log switch occurs

When the shared pool is flushed

When a checkpoint occurs

Question 14 of 40

15. 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

Whole database backup while the database is open

Cannot perform any backups in this mode

Can only perform logical backups

Question 15 of 40

16. 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_BUFFERS

DB_BLOCK_SIZE

Question 16 of 40

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

grant

alter user

alter database

alter system

Question 17 of 40

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

temporary tablespace

default tablespace

identified by

profile

Question 18 of 40

19. 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 executed

When the cursor is opened

When the statement is parsed

When data is fetched from the cursor

Question 19 of 40

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

SYS.AUD$

V$DATABASE

DBA_TABLES

EMP

Question 20 of 40

21. 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 create table privileges to the user

Grant the CONNECT role to the user

Reset the user's password

Question 21 of 40

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

From Oracle default values in OS

From the default settings for the tablespace

From the default settings in your redo log file

From your init.ora file or spfile

Question 22 of 40

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

Dictionary cache

Row cache

Buffer cache

Library cache

PGA

Question 23 of 40

24. 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?

Execute IMPORT to load the new metadata

Bring the tablespace online

Bring the tablespace offline

Physically move the datafile to the new location

Question 24 of 40

25. 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_LINE

RC_STORED_SCRIPT_CODE

RC_STORED_SCRIPT

RC_SOURCE_SCRIPT

Question 25 of 40

26. 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 modify column

alter table set unused column

truncate table

Question 26 of 40

27. 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?

Data segment

Temporary segment

Sequence segment

Undo segment

Question 27 of 40

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

insert

update

select

delete

Question 28 of 40

29. 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?

control01.ctl

utlrp.sql

pwdORCL.ora

init.ora

Question 29 of 40

30. 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?

USER_DUMP_DEST

CORE_DUMP_DEST

LOG_ARCHIVE_DEST

BACKGROUND_DUMP_DEST

Question 30 of 40

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

PMON

CKPT

LCK

SMON

Question 31 of 40

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

DEFAULT

None

DBA

CONNECT

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 user

alter database

alter redo log

alter system

Question 33 of 40

34. 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

Writes dirty buffers to disk

Reads information into memory for users

Writes redo log information to disk

Question 34 of 40

35. 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

Undo segments

Profiles

Roles

Question 35 of 40

36. 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 reverse-key index to a B-tree index.

Convert your bitmap index to a B-tree index.

Question 36 of 40

37. 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?

ARCH

LGWR

SMON

DBW0

PMON

Question 37 of 40

38. 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 immediate

shutdown abort

shutdown transnational

shutdown normal

Question 38 of 40

39. 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.

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

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

Question 39 of 40

40. 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 = 2 in init.ora

Set SESSIONS_PER_USER in the DEFAULT profile to 1

Set LICENSE_MAX_SESSIONS = 1 in 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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