Oracle DBA (Database Administration) Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Oracle DBA (Database Administration) Interview Questions

Questions Answers Views Company eMail

How can you determine if an index needs to be dropped and rebuilt?

558

A developer is trying to create a view and the database won’t let him. He has the "developer" role which has the "create view" system privilege and select grants on the tables he is using, what is the problem?

679

You look at your fragmentation report and see that smon has not coalesced any of you tablespaces, even though you know several have large chunks of contiguous free extents. What is the problem?

603

If you have an example table, what is the best way to get sizing data for the production table implementation?

547

What file will give you oracle instance status information? Where is it located?

615

A tablespace has a table with 30 extents in it. Is this bad? Why or why not.

573

How would you find total size of database in os level?

561

What is ora-1555 snapshot too old error? Explain in detail?

674

What is an artificial (derived) primary key?

605

What is different type of rman backup?

657

You see multiple fragments in the system tablespace, what should you check first?

580

Users get the following error: ora-00055 maximum number of dml locks exceeded? What is the problem and how do you fix it?

527

Explain dual table. Is any data internally stored in dual table. Lot of users is accessing select sysdate from dual and they getting some millisecond differences. If we execute select sysdate from emp; what error will we get. Why?

568

How do you set up your tablespace on installation level: low?

561

If you see the value for reloads is high in the estat library cache report is this a matter for concern?

622

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Un-Answered Questions { Oracle DBA (Database Administration) }

What are some indications that you need to increase the shared_pool_size parameter?

550

What is different type of rman backup?

657

How do you prevent oracle from giving you informational messages during and after a sql statement execution?

572

What is a dba programmer?

566

You look at the dba_rollback_segs view and see that there is a large number of shrinks and they are of relatively small size, is this a problem? How can it be fixed if it is a problem?

786

What are the important tasks of common oracle dba?

553

What is ora-1555 snapshot too old error? Explain in detail?

674

Is it necessary to have database in archive log mode in configuration dataguard , if yes then why?

579

What happens if a tablespace clause is left off of a primary key constraint clause?

577

What is the advantage of using rman?

717

If you see the value for reloads is high in the estat library cache report is this a matter for concern?

622

A user is getting an ora-00942 error yet you know you have granted them permission on the table, what else should you check?

553

Guideline for sizing db_block_size and db_multi_block_read for an application that does many full table scans?

607

What does >> do?

576

What is the purpose of the grep command?

2130

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