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

Oracle General (1809)
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)?

1933

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.

2123

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

2145

How does Oracle guarantee data integrity of data changes?

2388

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

2119

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

1 3592

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

2424

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

1 3719

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

1979

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

2 5282

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

2708

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?

2149

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

1916

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 8968

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 4018

Un-Answered Questions { Oracle }

What is an oracle function?

1165

What operator tests column for the absence of data?

599

Explain the use of compress option in exp command.

1021

What is meant by a deadlock situation?

1109

Explain integrity constraints?

1104

WHEN CURSOR MOVES FROM ONE FORM TO ANOTHER FORM, HOW MANY TRIGGER WILL BE FIRED AND WHAT ARE THEIR SEQUENCE?

2311

Database is hung. Old and new user connections alike hang on impact. What do you do? Your SYS SQLPLUS session IS able to connect.

2159

From the following identify the non schema object: packages, triggers, public synonyms, tables and indexes.

1068

Were you involved in any data conversion, which one?

What is the difference between truncate and delete? How would a full table scan behave after?

552

Explain the various types of oracle report?

1075

What are dml statements in oracle?

1095

How does oracle handle read consistency?

1097

What are the uses of linked server and explain it in detail?

1060

where the dff data will be stored

2439

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