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Oracle DBA (Database Administration) Interview Questions
Questions Answers Views Company eMail

You see the following on a status report: redo log space requests 23 redo log space wait time 0 is this something to worry about? What if redo log space wait time is high? How can you fix this?

568

When configuring sqlnet on the client what files need to be set up?

589

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

516

How can you determine the space left in a file system?

598

You have taken import of a table in a database. You have got the integrity constraint violation error. How you are going to resolve it.

548

Can you remove an open file under unix?

650

How can you determine if an oracle instance is up from the operating system level?

523

When should you increase copy latches?

590

How to uncatalog backup?

510

If you see a pin hit ratio of less than 0.8 in the estat library cache report is this a problem? If so, how do you fix it?

1155

What causes the "snapshot too old" error? How can this be prevented or mitigated?

480

How many redo logs should you have and how should they be configured for maximum recoverability?

533

How to drop an oracle database?

514

Describe hit ratio as it pertains to the database buffers. What is the difference between instantaneous and cumulative hit ratio and which should be used for tuning?

551

Discuss row chaining, how does it happen? How can you reduce it?

513


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

What is the difference between sga and pga?

567


What does >> do?

546


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

523


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?

572


Why do we need a database?

550


How much money does a dba make?

546


How do you install statspack?

643


What do you understand by recovery catalog?

530


While taking hot backup (begin end backup) what will happens back end?

528


What do you mean by oracle dba?

522


What happens if the constraint name is left out of a constraint clause?

509


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?

755


What happens when the default and temp tablespace clauses are left out from create user statements?

543


How can you find out how many users are currently logged into the database?

560


How do you put database is archivelog mode, explain procedure?

515