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 do you find out from the RMAN catalog if a particular archive log has been backed-up?

2122

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

2827

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

2270

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

2129

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?

2096

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

2049

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

2008

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

2353

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

2918

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?

2072

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.

1947

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

1899

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

4520

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

1 3529

Un-Answered Questions { Databases }

How to return an array from java to pl/sql?

1136

how to see the create table statement of an existing table? : Sql dba

1012

What are different types of statement?

1017

What are the components of sql server service broker?

1016

What is the limitation of mysql?

967

Explain oracle’s system global area (sga).

1139

Display the employees whose salary is less than average salary.

1066

What are the risks of storing a hibernate-managed object in a cache? How do you overcome the problems?

1105

What are the main sources of data?

1094

Why should we go for stored procedures? Why not direct queries?

1096

Which are the most powerful features in mongodb?

Which two statements are true about a foreign key?

971

What is the difference between sga and pga?

616

What is primary key in ms access 2007?

843

What happens if you no create privilege in a database?

1117

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