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 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?

SYSTEM

SYS

SCOTT

PUBLIC

Question 1 of 40

2. 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 redo log information to disk

Writes dirty buffers to disk

Writes current redo log number to datafile headers

Reads information into memory for users

Question 2 of 40

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

temporary tablespace

default role

profile

identified by

Question 3 of 40

4. 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 tablespace can have many datafiles.

Many tablespaces can share one datafile.

One datafile can contain many tablespaces.

Question 4 of 40

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

Based on the number of blocks in associated indexes only

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

Based on the number of blocks in the table only

No Answer is Correct

Based on the size of your shared pool

Question 5 of 40

6. 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 on disk where datafiles are added

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

Presence of objects in the datafile resized

Whether AUTOEXTEND is in use on datafiles for the tablespace

Question 6 of 40

7. 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_FREE_SPACE

DBA_EXTENTS

Question 7 of 40

8. 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 redo log buffer

In the buffer cache keep area

In the shared pool

In the PGA

Large pool area

Question 8 of 40

9. Your Oracle EMP table contains many unique values in the FIRST_NAME column. You want to index that column to take advantage of this fact in query access. Which of the following indexes might you use?

Function-based index

Simple B-tree index

reverse key index

Bitmap Index

Question 9 of 40

10. 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

Reset the user's password

Grant create table privileges to the user

Grant the CONNECT role to the user

Question 10 of 40

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

quota on

identified by

default tablespace

profile

Question 11 of 40

12. 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?

DBA_DATES

NLS_DATE_FORMAT

V$NLS_VALID_VALUES

V$NLS_PARAMETERS

Question 12 of 40

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

DB_BLOCK_SIZE

BUFFER_SIZE

ROLLBACK_SEGMENTS

DB_BLOCK_BUFFERS

Question 13 of 40

14. 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; then grant create any table to JOHN;

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

None of these

revoke admin option from create any table;

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 the statement is executed

When the statement is parsed

When the cursor is opened

When data is fetched from the cursor

Question 15 of 40

16. 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 16 of 40

17. 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 reverse-key index.

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

Convert your B-tree index to a bitmap index.

Convert your bitmap index to a B-tree index.

Question 17 of 40

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

Acquired row or table locks are released.

Cached data is saved immediately to disk.

Acquired undo segment locks are released.

Redo entry generated for committed transaction.

Question 18 of 40

19. 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 normal

shutdown transnational

Question 19 of 40

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

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

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

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

You can use variable-length multibyte character sets as both character sets on your database.

Question 20 of 40

21. 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 21 of 40

22. 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

init.ora

pwdORCL.ora

utlrp.sql

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?

Buffer cache

Row cache

Dictionary cache

PGA

Library cache

Question 23 of 40

24. 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 24 of 40

25. 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

truncate table

alter table modify column

alter table set unused column

Question 25 of 40

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

SWITCH

RENAME

CHANGE

CATALOG

Question 26 of 40

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

Session UGA

Library cache

Row cache

Buffer cache

Question 27 of 40

28. 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

Sequence segment

Undo segment

Temporary segment

Question 28 of 40

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

Serial number

SID

Password

Username

Question 29 of 40

30. 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.

Values specified for BACKGROUND_DUMP_DEST.

Oracle knows automatically where to look.

Values specified in V$DATABASE.

Question 30 of 40

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

Control file

SGA

Library cache

Shared pool

Question 31 of 40

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

Human error

Process failure

Statement failure

Instance failure

Question 32 of 40

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

PMON

SMON

CKPT

LCK

Question 33 of 40

34. 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.

Use the alter database add LOGFILE GROUP 5;

Create multiple members for each of your four groups and place them on different disks.

Question 34 of 40

35. 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?

PMON

ARCH

SMON

LGWR

DBW0

Question 35 of 40

36. 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.

Create more indexes on the table.

Increase the PCTFREE value set for table blocks.

Question 36 of 40

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

In the shared pool area

In the PGA

In the buffer cache keep area

In the redo log buffer

Large area

Question 37 of 40

38. 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

RC_SOURCE_SCRIPT

RC_STORED_SCRIPT_CODE

Question 38 of 40

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

From the default settings in your redo log file

From Oracle default values in OS

From the default settings for the tablespace

From your init.ora file or spfile

Question 39 of 40

40. 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?

drop tablespace including contents

alter database datafile offline drop

alter tablespace offline immediate

drop tablespace cascade constraints

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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