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

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Database Management (1411)
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Databases Interview Questions

Questions Answers Views Company eMail

How can you tell how much space is left on a given file system and how much space each of the file system's subdirectories take-up?

2505

Define the SGA and: How you would configure SGA for a mid-sized OLTP environment? What is involved in tuning the SGA?

3764

What is the cache hit ratio, what impact does it have on performance of an Oracle database and what is involved in tuning it?

2467

Other than making use of the statspack utility, what would you check when you are monitoring or running a health check on an Oracle 8i or 9i database?

1987

How do you tell what your machine name is and what is its IP address?

4 7310

How would you go about verifying the network name that the local_listener is currently using?

3221

You have 4 instances running on the same UNIX box. How can you determine which shared memory and semaphores are associated with which instance?

4431

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

2554

What is the recommended interval at which to run statspack snapshots, and why?

1 3270

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?

2687

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.

2159

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

1 4794

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

2414

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?

2362

Un-Answered Questions { Databases }

We need to perform what steps in the following order to work with a cursor?

1220

what is meant by nl2br()? : Sql dba

1051

What is the difference between cartesian product and cross join?

868

How to populate a table in sql server?

965

Explain an exception?

1003

What is oracle d2k?

Does mongodb require a schema?

what are the types of join and explain each? : Sql dba

1042

write an sql query to get third maximum salary of an employee from a table named employee_table. : Sql dba

977

How to replace the Query Result 'Null Value' with a text ?

1048

What is a lookup table in oracle?

974

what is the difference between char_length and length? : Sql dba

1050

While you are inserting values into a table with the insert into .. Values option, does the order of the columns in the insert statement have to be the same as the order of the columns in the table?

991

Explain the terms database and dbms?

925

Can we use commit inside a trigger?

1097

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