Practice online oracle dba quiz

📁

Tutorial Collection

This guide is part of our comprehensive Oracle Database Reference Hub.

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 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 1 of 40

2. 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 the table only

No Answer is Correct

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

Based on the number of blocks in associated indexes only

Based on the size of your shared pool

Question 2 of 40

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

Cached data is saved immediately to disk.

Acquired undo segment locks are released.

Redo entry generated for committed transaction.

Acquired row or table locks are released.

Question 3 of 40

4. You issue the alter tablespace read only command against an Oracle database. Which of the following choices best describes what happens next?

Oracle returns an error.

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

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 immediately puts the tablespace into read-only mode.

Question 4 of 40

5. 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 cascade constraints

drop tablespace including contents

alter tablespace offline immediate

alter database datafile offline drop

Question 5 of 40

6. 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 6 of 40

7. 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 shared pool

In the buffer cache keep area

In the PGA

Large pool area

Question 7 of 40

See also How to check db size in oracle

8. 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?

init.ora

pwdORCL.ora

utlrp.sql

control01.ctl

Question 8 of 40

9. 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.

Use the alter database add LOGFILE GROUP 5;

Set LOG_BLOCK_CHECKSUM in the init.ora file.

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

Question 9 of 40

10. 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 normal

shutdown abort

shutdown transnational

Question 10 of 40

11. 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

Undo segments

Profiles

Parameter files

Question 11 of 40

12. 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 admin option from create any table;

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

None of these

Question 12 of 40

13. 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

Control file

Library cache

Question 13 of 40

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

profile

default role

identified by

temporary tablespace

Question 14 of 40

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

identified by

default tablespace

temporary tablespace

profile

Question 15 of 40

16. 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_EXTENTS

DBA_TABLESPACES

V$TABLESPACE

Question 16 of 40

17. 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 17 of 40

18. 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?

SMON

LGWR

DBW0

ARCH

PMON

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?

PUBLIC

SYSTEM

SYS

SCOTT

Question 19 of 40

20. 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 20 of 40

21. 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 21 of 40

22. 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 22 of 40

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

Password

Serial number

SID

Username

Question 23 of 40

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

The DBW0 process obtains information for the user

The listener process obtains information for the user.

The server process obtains information for the user.

The user process obtains information on its own.

Question 24 of 40

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

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.

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

Question 25 of 40

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

grant

alter database

alter user

alter system

Question 26 of 40

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

insert

select

update

delete

Question 27 of 40

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

Human error

Process failure

Statement failure

Instance failure

Question 28 of 40

29. 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.

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.

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

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?

SYS.AUD$

EMP

DBA_TABLES

V$DATABASE

Question 30 of 40

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

RMAN does not require the tablespace to be in backup mode

You need to keep the tablespace in backup mode explicitly.

You need to make the tablespace offline.

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

Question 31 of 40

32. We are designing the physical database layout on your host machine. What is the relationship between tablespaces and datafiles in the Oracle database?

Many tablespaces can share one datafile.

One datafile can contain many tablespaces.

One tablespace can have many datafiles.

One tablespace has only one datafile.

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 a bitmap in the space header segment

Using the data dictionary on the local database

Using a flat file in the local directory storing the datafile

Using the data dictionary in a distributed database

Question 33 of 40

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

SMON

PMON

LCK

CKPT

Question 34 of 40

35. 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 redo log information to disk

Reads information into memory for users

Writes dirty buffers to disk

Question 35 of 40

36. 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 in the DEFAULT profile to 1

Set SESSIONS_PER_USER = 2 in init.ora

Set IDLE_TIME in the DEFAULT profile to 1

Question 36 of 40

37. 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 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

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

Question 37 of 40

38. 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 an index-organized table to store the data.

Drop the primary key

Create more indexes on the table.

Increase the PCTFREE value set for table blocks.

Question 38 of 40

39. 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 database

alter redo log

alter user

alter system

Question 39 of 40

40. 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 modify column

alter table drop column

alter table set unused column

truncate table

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!!!!

Related Articles
How to prepare for OCI Associate Certified Examination : This post covers on how to prepare for Oracle cloud infrastructure Associate Architect examination (1Z0 932 /1072)
Oracle sql online test :Check out this Oracle sql online test for interview preparation & certification. This will help in checking your understanding on Oracle SQL
Tips for Passing OCI examination : Here is Oracle provided tips to clear OCI certification
Oracle Performance & Tuning Quiz : Check out this Oracle performance online test for interview preparation & certification. This will help in checking your understanding on Oracle SQL
Oracle Database Quiz : This is a Oracle Database Quiz to check your understanding on Oracle concepts. This will be helpful for interview and certification examination
oracle quiz : This is a online Oracle Quiz to check your understanding on Oracle stuff like Truncate,delete, drop ,constraints, select query,distinct and many more

Instructions for online test

Related Posts

Leave a Comment Cancel Reply