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 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 immediately.

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

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

Question 1 of 40

2. 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 2 of 40

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

Session UGA

Buffer cache

Row cache

Library cache

Question 3 of 40

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

profile

default tablespace

identified by

temporary tablespace

Question 4 of 40

5. 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

PMON

DBW0

Question 5 of 40

6. 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?

Undo segment

Data segment

Temporary segment

Sequence segment

Question 6 of 40

7. 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 the lost file, mount the database, and recover the database

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

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

Question 7 of 40

8. 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.

The tablespace clause must be omitted.

Bitmap indexes cannot be unique.

Question 8 of 40

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

default role

identified by

temporary tablespace

profile

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 database datafile offline drop

drop tablespace cascade constraints

drop tablespace including contents

alter tablespace offline immediate

Question 10 of 40

11. 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 log switch occurs

When the shared pool is flushed

When a time-out occurs

Question 11 of 40

12. 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?

Drop the primary key

Create an index-organized table to store the data.

Increase the PCTFREE value set for table blocks.

Create more indexes on the table.

Question 12 of 40

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

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.

You need to make the tablespace offline.

RMAN does not require the tablespace to be in backup mode

Question 13 of 40

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

Password

Serial number

Username

SID

Question 14 of 40

15. 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 15 of 40

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

Instance failure

Process failure

Statement failure

Human error

Question 16 of 40

17. 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?

Roles

Profiles

Undo segments

Parameter files

Question 17 of 40

18. 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 the default settings for the tablespace

From Oracle default values in OS

From the default settings in your redo log file

Question 18 of 40

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

Oracle returns an error.

Oracle immediately puts the tablespace into read-only mode.

Question 19 of 40

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

BUFFER_SIZE

DB_BLOCK_SIZE

ROLLBACK_SEGMENTS

DB_BLOCK_BUFFERS

Question 20 of 40

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

Large area

In the buffer cache keep area

In the redo log buffer

In the shared pool area

In the PGA

Question 21 of 40

22. 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?

CORE_DUMP_DEST

BACKGROUND_DUMP_DEST

USER_DUMP_DEST

LOG_ARCHIVE_DEST

Question 22 of 40

23. 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?

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

Whether AUTOEXTEND is in use on datafiles for the tablespace

Presence of objects in the datafile resized

Availability of space on disk where datafiles are added

Question 23 of 40

24. 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 CONTROL_FILES.

Oracle knows automatically where to look.

Values specified in V$DATABASE.

Values specified for BACKGROUND_DUMP_DEST.

Question 24 of 40

25. 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 transnational

shutdown abort

shutdown immediate

shutdown normal

Question 25 of 40

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

Redo entry generated for committed transaction.

Cached data is saved immediately to disk.

Acquired row or table locks are released.

Acquired undo segment locks are released.

Question 26 of 40

27. 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

DBA_TABLESPACES

DBA_EXTENTS

V$TABLESPACE

Question 27 of 40

28. 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 redo log

alter system

alter user

alter database

Question 28 of 40

29. 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$DATABASE

V$PARAMETER

V$CONTROLFILE

Question 29 of 40

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

Cannot perform any backups in this mode

Can only perform logical backups

Whole database backup while the database is open

Whole database backup after the database is gracefully closed

Question 30 of 40

31. 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 shared pool

In the redo log buffer

In the PGA

In the buffer cache keep area

Large pool area

Question 31 of 40

32. 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 a bitmap in the space header segment

Using the data dictionary on the local database

Using the data dictionary in a distributed database

Question 32 of 40

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

Shared pool

SGA

Library cache

Control file

Question 33 of 40

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

Buffer cache

Dictionary cache

Library cache

PGA

Row cache

Question 34 of 40

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

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

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

Question 35 of 40

36. 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.

One tablespace can have many datafiles.

Many tablespaces can share one datafile.

Question 36 of 40

37. 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 admin option from create any table;

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

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

Question 37 of 40

38. 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 SESSIONS_PER_USER in the DEFAULT profile to 1

Set LICENSE_MAX_SESSIONS = 1 in init.ora

Set IDLE_TIME in the DEFAULT profile to 1

Set SESSIONS_PER_USER = 2 in init.ora

Question 38 of 40

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

delete

select

insert

update

Question 39 of 40

40. 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_SORT

NLS_CURRENCY

NLS_DATE_FORMAT

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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