Oracle Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Oracle General (1803)
Oracle DBA (Database Administration) (261)
Oracle Call Interface (OCI) (10)
Oracle Architecture (90)

Oracle Interview Questions

Questions Answers Views Company eMail

How do you increase the OS limitation for open files (LINUX and/or Solaris)?

1981

Provide an example of a shell script which logs into SQLPLUS as SYS, determines the current date, changes the date format to include minutes & seconds, issues a drop table command, displays the date again, and finally exits.

2181

Explain how you would restore a database using RMAN to Point in Time?

2192

How does Oracle guarantee data integrity of data changes?

2460

Which environment variables are absolutely critical in order to run the OUI?

2182

What SQL query from v$session can you run to show how many sessions are logged in as a particular user account?

1 3661

Why does Oracle not permit the use of PCTUSED with indexes?

2485

What would you use to improve performance on an insert statement that places millions of rows into that table?

1 3797

What would you do with an in-doubt distributed transaction?

2051

What are the commands youd issue to show the explain plan for select

2 5390

In what script is snap$ created? In what script is the scott/tiger schema created?

2763

If youre unsure in which script a sys or system-owned object is created, but you know its in a script from a specific directory, what UNIX command from that directory structure can you run to find your answer?

2198

How would you configure your networking files to connect to a database by the name of DSS which resides in domain icallinc.com?

1976

You create a private database link and upon connection, fails with: ORA-2085: connects to . What is the problem? How would you go about resolving this error?

1 9058

I have my backup RMAN script called backup_rman.sh. I am on the target database. My catalog username/password is rman/rman. My catalog db is called rman. How would you run this shell script from the O/S such that it would run as a background process?

1 4127

Un-Answered Questions { Oracle }

What is the difference between BPA AND Contract What are documents and test cases u followed

2443

What is primefaces used for?

1102

What do you mean by database normalization and why is it important?

What is the difference between raid 5 and raid 10? Which is better for oracle?

639

What privilege is needed for a user to delete rows from tables in another schema?

1143

How would you edit your CRONTAB to schedule the running of /test/test.sh to run every other day at 2PM?

1996

what does the no logging option do? Why would we use it?

604

What will be the syntax to find current date and time in format "yyyy-mm-dd"?

1069

What do you understand by recovery catalog?

601

How to connect to oracle using service name instead of sid?

1077

Explain the use of show option in imp command.

1155

Define oracle database

1105

What is the difference between substr & instr functions?

1297

What is the minimum client footprint required to connect c# to an oracle database?

1167

while i take backup using ibm tsm the following errors occurred: rman-03009 ora-19513 ora-27206 ora-19502 ora-27030 ora-ora19511

4419

For More Un-Answered { Oracle } Questions Click Here