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 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 1 of 40

2. 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 more indexes on the table.

Create an index-organized table to store the data.

Increase the PCTFREE value set for table blocks.

Question 2 of 40

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

Library cache

Session UGA

Row cache

Buffer cache

Question 3 of 40

4. 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 tablespace offline immediate

alter database datafile offline drop

drop tablespace cascade constraints

drop tablespace including contents

Question 4 of 40

5. 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?

Grant the CONNECT role to the user

Reset the user's password

Grant create table privileges to the user

Unlock the user's account

Question 5 of 40

6. 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 buffer cache keep area

In the redo log buffer

In the shared pool

Large pool area

Question 6 of 40

7. 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

Sequence segment

Temporary segment

Question 7 of 40

8. 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_FREES_SPACE

DBA_INDEXES

DBA_OBJECTS

Question 8 of 40

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

LCK

PMON

CKPT

SMON

Question 9 of 40

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

ROLLBACK_SEGMENTS

BUFFER_SIZE

DB_BLOCK_BUFFERS

DB_BLOCK_SIZE

Question 10 of 40

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

temporary tablespace

identified by

default role

profile

Question 11 of 40

12. 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 database

alter redo log

alter user

Question 12 of 40

13. 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

Library cache

Row cache

PGA

Dictionary cache

Question 13 of 40

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

DBA

None

DEFAULT

CONNECT

Question 14 of 40

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

To load data using the serial mode, you must activate the direct-path insert by specifying the SERIAL hint.

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

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.

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

Question 15 of 40

16. 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 can have many datafiles.

One tablespace has only one datafile.

Many tablespaces can share one datafile.

One datafile can contain many tablespaces.

Question 16 of 40

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

identified by

profile

default tablespace

quota on

Question 17 of 40

18. 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.

The tablespace clause must be omitted.

You should omit the asc keyword.

Bitmap indexes cannot be unique.

Question 18 of 40

19. 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 19 of 40

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

temporary tablespace

default tablespace

profile

identified by

Question 20 of 40

21. 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 removed from the table.

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

Question 21 of 40

22. 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 22 of 40

23. 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?

Bitmap Index

Simple B-tree index

reverse key index

Function-based index

Question 23 of 40

24. 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 24 of 40

25. 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 25 of 40

26. 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_TABLESPACES

DBA_EXTENTS

DBA_FREE_SPACE

V$TABLESPACE

Question 26 of 40

27. 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 27 of 40

28. 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 28 of 40

29. 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

SMON

DBW0

LGWR

PMON

Question 29 of 40

30. 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 time-out occurs

When a log switch occurs

When the shared pool is flushed

When a checkpoint occurs

Question 30 of 40

31. 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?

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

Presence of objects in the datafile resized

Question 31 of 40

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

Oracle immediately puts the tablespace into read-only mode.

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.

Question 32 of 40

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

alter system

grant

alter user

alter database

Question 33 of 40

34. 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.

It updates the non-availability of the files by updating the information in the recovery catalog with the appropriate status.

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.

Question 34 of 40

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

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.

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

Question 35 of 40

36. 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

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

You need to make the tablespace offline.

You need to keep the tablespace in backup mode explicitly.

Question 36 of 40

37. You are identifying dictionary objects in the Oracle database. Which of the following is a view in the data dictionary?

V$DATABASE

EMP

DBA_TABLES

SYS.AUD$

Question 37 of 40

38. 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 parsed

When the cursor is opened

When the statement is executed

Question 38 of 40

39. 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 39 of 40

40. 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

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

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

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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