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

Oracle (3259)
SQL Server (4518)
MS Access (429)
MySQL (1402)

Postgre (483)
Sybase (267)
DB Architecture (141)
DB Administration (291)

DB Development (113)
SQL PLSQL (3330)
MongoDB (502)
IBM Informix (50)

Neo4j (82)
InfluxDB (0)
Apache CouchDB (44)
Firebird (5)

Database Management (1411)
Databases AllOther (288)

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?

2509

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

3767

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

2470

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?

1988

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

4 7316

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

3225

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

4434

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

2560

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

1 3274

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?

2691

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.

2160

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

1 4800

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

2416

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

2725

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

2369

Un-Answered Questions { Databases }

Which type of object is used to organize and store data in microsoft access?

881

What is the data quality?

633

How is sql used in oracle?

1015

Does google have a database like access?

979

What is blocking and how would you troubleshoot it? : sql server database administration

1055

What is a periodical index?

934

Explain the use of constraints option in exp command.

1053

What does <> symbol mean?

985

how can you process messages in order asynchronously?

982

How to use sql*plus built-in timers?

1211

Which process writes data from data files to database buffer cache?

614

What is the maximum size of ms access database?

809

What is the contrast amongst drop and truncate?

1038

When should I use nosql database?

1019

Explain a checkpoint?

1046

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