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. 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?

Profiles

Roles

Parameter files

Undo segments

Question 1 of 40

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

Library cache

Shared pool

SGA

Control file

Question 2 of 40

3. 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 3 of 40

4. Which one of the following RMAN views must you query to view the code of an existing stored script in the recovery catalog?

RC_SOURCE_SCRIPT

RC_STORED_SCRIPT_CODE

RC_STORED_SCRIPT_LINE

RC_STORED_SCRIPT

Question 4 of 40

5. 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.

Drop the primary key

Create an index-organized table to store the data.

Increase the PCTFREE value set for table blocks.

Question 5 of 40

6. 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?

pwdORCL.ora

init.ora

control01.ctl

utlrp.sql

Question 6 of 40

7. 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 7 of 40

8. 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 dirty buffers to disk

Writes redo log information to disk

Reads information into memory for users

Writes current redo log number to datafile headers

Question 8 of 40

9. 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?

Sequence segment

Temporary segment

Data segment

Undo segment

Question 9 of 40

10. 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_VALID_VALUES

V$NLS_PARAMETERS

NLS_DATE_FORMAT

DBA_DATES

Question 10 of 40

11. 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 only

Based on the size of your shared pool

No Answer is Correct

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

Question 11 of 40

12. 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?

Reset the user's password

Unlock the user's account

Grant create table privileges to the user

Grant the CONNECT role to the user

Question 12 of 40

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

LCK

SMON

CKPT

PMON

Question 13 of 40

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

Serial number

Username

Password

SID

Question 14 of 40

15. 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 user process obtains information on its own.

The server process obtains information for the user.

The listener process obtains information for the user.

Question 15 of 40

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

default tablespace

temporary tablespace

profile

identified by

Question 16 of 40

17. 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_SEGMENTS

DBA_OBJECTS

DBA_FREES_SPACE

DBA_INDEXES

Question 17 of 40

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

Library cache

Row cache

Buffer cache

Session UGA

Question 18 of 40

19. 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.

Many tablespaces can share one datafile.

One tablespace can have many datafiles.

One tablespace has only one datafile.

Question 19 of 40

20. 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 = 2 in init.ora

Set IDLE_TIME in the DEFAULT profile to 1

Set LICENSE_MAX_SESSIONS = 1 in init.ora

Set SESSIONS_PER_USER in the DEFAULT profile to 1

Question 20 of 40

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

Process failure

Instance failure

Statement failure

Human error

Question 21 of 40

22. 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 22 of 40

23. 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

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

Question 23 of 40

24. 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 24 of 40

25. 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?

SCOTT

PUBLIC

SYS

SYSTEM

Question 25 of 40

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

RENAME

SWITCH

CHANGE

CATALOG

Question 26 of 40

27. 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 removed from the table.

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.

Question 27 of 40

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

Redo entry generated for committed transaction.

Acquired row or table locks are released.

Cached data is saved immediately to disk.

Acquired undo segment locks are released.

Question 28 of 40

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

DBA

None

DEFAULT

CONNECT

Question 29 of 40

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

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.

Question 30 of 40

31. 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?

LOG_ARCHIVE_DEST

USER_DUMP_DEST

CORE_DUMP_DEST

BACKGROUND_DUMP_DEST

Question 31 of 40

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

profile

identified by

default role

temporary tablespace

Question 32 of 40

33. 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

V$CONTROLFILE_RECORD_SECTION

V$DATABASE

V$PARAMETER

Question 33 of 40

34. 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 immediately puts the tablespace into read-only mode.

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

Oracle returns an error.

Question 34 of 40

35. 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?

Use the alter database add LOGFILE GROUP 5;

Set LOG_BLOCK_CHECKSUM in the init.ora file.

Change the CONTROL_FILES parameter in the init.ora file.

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

Question 35 of 40

36. 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 BACKGROUND_DUMP_DEST.

Oracle knows automatically where to look.

Values specified for CONTROL_FILES.

Values specified in V$DATABASE.

Question 36 of 40

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

quota on

profile

identified by

default tablespace

Question 37 of 40

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

In the shared pool area

In the redo log buffer

Large area

In the PGA

In the buffer cache keep area

Question 38 of 40

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

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.

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

Question 39 of 40

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

alter system

alter user

grant

alter database

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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