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 considering using the MTS architecture on the Oracle database. Session information when shared servers are being used is stored where in the Oracle database?

In the PGA

In the shared pool

In the redo log buffer

Large pool area

In the buffer cache keep area

Question 1 of 40

2. 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.

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.

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

Question 2 of 40

3. 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$DATABASE

V$CONTROLFILE_RECORD_SECTION

V$CONTROLFILE

V$PARAMETER

Question 3 of 40

4. 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

pwdORCL.ora

control01.ctl

init.ora

Question 4 of 40

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

From your init.ora file or spfile

From Oracle default values in OS

From the default settings for the tablespace

From the default settings in your redo log file

Question 5 of 40

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

Serial number

Password

SID

Username

Question 6 of 40

7. 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 7 of 40

8. 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

USER_DUMP_DEST

CORE_DUMP_DEST

LOG_ARCHIVE_DEST

Question 8 of 40

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

alter user

grant

alter database

alter system

Question 9 of 40

See also Oracle Advanced Queuing

10. 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_INDEXES

DBA_OBJECTS

DBA_SEGMENTS

DBA_FREES_SPACE

Question 10 of 40

11. 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 11 of 40

12. 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 12 of 40

13. 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 transnational

shutdown normal

shutdown abort

Question 13 of 40

14. 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 14 of 40

15. 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 15 of 40

16. 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?

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

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

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 16 of 40

17. 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 17 of 40

18. 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 user

alter database

alter redo log

Question 18 of 40

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

CATALOG

RENAME

CHANGE

SWITCH

Question 19 of 40

20. 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.

Set LOG_BLOCK_CHECKSUM in the init.ora file.

Use the alter database add LOGFILE GROUP 5;

Question 20 of 40

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

Statement failure

Process failure

Instance failure

Human error

Question 21 of 40

22. 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 checkpoint occurs

When a time-out occurs

When a log switch occurs

When the shared pool is flushed

Question 22 of 40

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

The server process obtains information for the 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.

Question 23 of 40

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

DB_BLOCK_SIZE

DB_BLOCK_BUFFERS

ROLLBACK_SEGMENTS

BUFFER_SIZE

Question 24 of 40

25. 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 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.

Question 25 of 40

26. 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 26 of 40

27. 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?

NLS_DATE_FORMAT

DBA_DATES

V$NLS_VALID_VALUES

V$NLS_PARAMETERS

Question 27 of 40

28. 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 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;

None of these

Question 28 of 40

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

temporary tablespace

profile

identified by

default tablespace

Question 29 of 40

30. 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

PGA

Library cache

Buffer cache

Row cache

Question 30 of 40

31. 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 31 of 40

32. 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

Physically move the datafile to the new location

Bring the tablespace online

Execute IMPORT to load the new metadata

Question 32 of 40

33. 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 33 of 40

34. 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_SORT

NLS_LANG

Question 34 of 40

35. 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 should omit the asc keyword.

You cannot use the nosort keyword in creating an index.

The tablespace clause must be omitted.

Question 35 of 40

36. 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 on disk where datafiles are added

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

Question 36 of 40

37. 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 parsed

When data is fetched from the cursor

When the statement is executed

Question 37 of 40

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

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.

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 38 of 40

39. 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 bitmap index to a B-tree index.

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

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

Question 39 of 40

40. 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

Undo segment

Temporary segment

Sequence segment

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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