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

Oracle (3259)
SQL Server (4518)
MS Access (429)
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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?

2126

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?

2829

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?

2137

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?

1990

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

2100

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?

2014

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

2355

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

2923

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?

2081

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.

1951

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

1915

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

4524

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

1 3537

Un-Answered Questions { Databases }

What is oracle database 10g express edition?

1122

What is dbms pdf?

1085

What is the difference between having and a where in sql?

1111

what number files will a information contain in SQL Server? How many forms of information files exist in SQL Server? How many of those files can exist for a single database?

1065

List the important features of mongodb.

Explain the working of primary key?

1101

What will happen when you remove a document from database in mongodb? Does mongodb remove it from disk?

What are the essential components of sql server service broker?

1020

What is the importance of database partitioning?

1063

Is it true that rules do not apply to data already existing in a database at the time the rule is created?

1047

What is CDC and explain complete CDC process flow?

597

Do models have limitations?

897

What is a bit datatype?

990

What exactly do quotation marks around the table name do?

965

Enlist the characteristics of pl/sql?

1806

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