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. 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 1 of 40

2. 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_CODE

RC_STORED_SCRIPT

RC_SOURCE_SCRIPT

RC_STORED_SCRIPT_LINE

Question 2 of 40

3. 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_SORT

NLS_DATE_FORMAT

NLS_LANG

NLS_CURRENCY

Question 3 of 40

4. 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 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

Using a bitmap in the space header segment

Question 4 of 40

5. 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?

Presence of objects in the datafile resized

Availability of space on disk where datafiles are added

Whether AUTOEXTEND is in use on datafiles for the tablespace

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

Question 5 of 40

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

SGA

Shared pool

Library cache

Control file

Question 6 of 40

7. 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?

Set LOG_BLOCK_CHECKSUM in the init.ora file.

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

Change the CONTROL_FILES parameter in the init.ora file.

Use the alter database add LOGFILE GROUP 5;

Question 7 of 40

8. 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

SYSTEM

SYS

Question 8 of 40

9. 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 create any table from JOHN; then grant create any table to JOHN;

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

None of these

revoke admin option from create any table;

Question 9 of 40

10. 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?

Undo segments

Profiles

Roles

Parameter files

Question 10 of 40

11. 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 should omit the asc keyword.

The tablespace clause must be omitted.

You cannot use the nosort keyword in creating an index.

Bitmap indexes cannot be unique.

Question 11 of 40

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

Statement failure

Process failure

Human error

Instance failure

Question 12 of 40

13. 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 13 of 40

14. 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.

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

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

Question 14 of 40

15. 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?

Oracle knows automatically where to look.

Values specified in V$DATABASE.

Values specified for CONTROL_FILES.

Values specified for BACKGROUND_DUMP_DEST.

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?

identified by

profile

default tablespace

temporary tablespace

Question 16 of 40

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

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

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

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 17 of 40

18. 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

drop tablespace cascade constraints

alter database datafile offline drop

drop tablespace including contents

Question 18 of 40

19. 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 19 of 40

20. 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 current redo log number to datafile headers

Writes dirty buffers to disk

Reads information into memory for users

Question 20 of 40

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

Dictionary cache

Buffer cache

Row cache

PGA

Library cache

Question 21 of 40

22. 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 your init.ora file or spfile

From the default settings in your redo log file

Question 22 of 40

23. 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.

Many tablespaces can share one datafile.

One datafile can contain many tablespaces.

One tablespace can have many datafiles.

Question 23 of 40

24. 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 added to the table.

The change will not take effect for existing tables.

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

The change takes effect immediately.

Question 24 of 40

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

SID

Serial number

Password

Username

Question 25 of 40

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

temporary tablespace

default role

identified by

profile

Question 26 of 40

27. 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 plus blocks in associated indexes

Based on the number of blocks in associated indexes only

No Answer is Correct

Based on the number of blocks in the table only

Based on the size of your shared pool

Question 27 of 40

28. 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 28 of 40

29. 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?

Increase the PCTFREE value set for table blocks.

Create more indexes on the table.

Drop the primary key

Create an index-organized table to store the data.

Question 29 of 40

30. Which one of the following statements is incorrect with respect to RMAN's CROSSCHECK command?

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 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.

Question 30 of 40

31. 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 the shared pool is flushed

When a log switch occurs

When a time-out occurs

When a checkpoint occurs

Question 31 of 40

32. 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

Sequence segment

Data segment

Temporary segment

Question 32 of 40

33. 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 33 of 40

34. 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 34 of 40

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

profile

quota on

default tablespace

identified by

Question 35 of 40

36. 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

DBW0

PMON

SMON

Question 36 of 40

37. 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

control01.ctl

utlrp.sql

init.ora

Question 37 of 40

38. 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 38 of 40

39. 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_OBJECTS

DBA_FREES_SPACE

DBA_INDEXES

DBA_SEGMENTS

Question 39 of 40

40. 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_PARAMETERS

V$NLS_VALID_VALUES

NLS_DATE_FORMAT

DBA_DATES

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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