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

DB Administration Interview Questions

Questions Answers Views Company eMail

What spfile/init.ora file parameter exists to force the CBO to make the execution path of a given statement use an index, even if the index scan may appear to be calculated as more costly?

2680

Assuming today is Monday, how would you use the DBMS_JOB package to schedule the execution of a given procedure owned by SCOTT to start Wednesday at 9AM and to run subsequently every other day at 2AM.

2153

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

1 4788

What do the 9i dbms_standard.sql_txt() and dbms_standard.sql_text() procedures do?

2411

In which dictionary table or view would you look to determine at which time a snapshot or MVIEW last successfully refreshed?

2720

How would you best determine why your MVIEW couldn't FAST REFRESH?

2360

How does propagation differ between Advanced Replication and Snapshot Replication (read-only)?

2036

Which dictionary view(s) would you first look at to understand or get a high-level idea of a given Advanced Replication environment?

1908

How would you begin to troubleshoot an ORA-3113 error?

1 4821

Which dictionary tables and/or views would you look at to diagnose a locking issue?

2 6306

An automatic job running via DBMS_JOB has failed. Knowing only that "it's failed", how do you approach troubleshooting this issue?

1 5254

How would you extract DDL of a table without using a GUI tool?

2489

You're getting high "busy buffer waits" - how can you find what's causing it?

1 5476

What query tells you how much space a tablespace named "test" is taking up, and how much space is remaining?

1 4518

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

2043

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Un-Answered Questions { DB Administration }

What is a correlated sub-query? : sql server DBA

1087

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

2942

What is dcl? : sql server DBA

1269

Claims and Drains are the locks used to control the concurrency between SQL processes and utilities. Referring to the above statement, what is the maximum number of concurrent Claimers for a Subsystem? Choice 1 32 Choice 2 64 Choice 3 128 Choice 4 256 Choice 5 No limit

2298

what do you understand by fine-grained auditing?

1057

What are the different ways you can create databases in sql server? : sql server DBA

1139

What are the high-availability solutions in sql server and differentiate them briefly? : sql server DBA

1046

how can you process messages in order asynchronously?

976

What view(s) do you use to associate a user's SQLPLUS session with his o/s process?

2550

What the different types of replication and why are they used? : sql server DBA

1178

What is the importance of a recovery model? : sql server DBA

1028

Where would you look for errors from the database engine?

2851

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?

1985

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

2043

What are statistics, under what circumstances they go out of date, how do you update them?

2251

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