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 to Optimize Database Queries for Performance?

1 2241

What are Stored Procedures and When would we Use Them?

1 2250

How to Handle Missing Data in a Database?

1 2029

Describe the Process of Feature Engineering using SQL.

1 967

What are the different types of databases?

1 1143

What are ACID properties in databases?

1 2370

What is the difference between INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN?

1 1137

What is indexing, and how does it improve performance?

1 1022

What is a deadlock in SQL? How can you prevent it?

1 2630

What is the CAP theorem?

1 1043

How would you optimize a slow SQL query?

1 2647

How do you handle duplicate records in a database?

1 1007

How would you design a database for an e-commerce website?

1 1003

How do you ensure database security?

1 1130

What would you do if a database crashes in production?

1 916

Un-Answered Questions { Databases }

Guideline for sizing db_block_size and db_multi_block_read for an application that does many full table scans?

572

Is database a storage?

851

Who is the founder of database?

1023

What is a partition in oracle?

1049

Which Model uses the SET concept

944

What happens when converting big values to numeric data types?

1052

Can you insert and retrive images in msaccess using java? If yes, how?

790

What is the use of sqldataadapter?

919

What is the purpose of update statistics and scope_identity() function?

1061

What is snapshot replication?

1008

What is sqlservr.exe - process - sql server (sqlex?press)?

1062

What is an optimization and performance tuning and how does it really work in practical projects?

836

What do you understand by replication in sql server?

1003

Define commit?

950

What is the timestamp datatype in sybase?

901

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