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

Oracle (3253)
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 2999

What are Stored Procedures and When would we Use Them?

1 3052

How to Handle Missing Data in a Database?

1 2163

Describe the Process of Feature Engineering using SQL.

1 1123

What are the different types of databases?

1 1305

What are ACID properties in databases?

1 3250

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

1 1326

What is indexing, and how does it improve performance?

1 1181

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

1 3549

What is the CAP theorem?

1 1213

How would you optimize a slow SQL query?

1 3521

How do you handle duplicate records in a database?

1 1138

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

1 1146

How do you ensure database security?

1 1296

What would you do if a database crashes in production?

1 1071

Un-Answered Questions { Databases }

What is an entity-relationship model?

986

how can you perform lookup range in lookup stage expalin in detail?

1974

What are procedures in dbms?

975

How many triggers are possible per table?

1140

Does mongodb have tables?

How to add a new column to an existing table with a default value?

1056

What are the arithmetic operations?

1147

How to insert data into mongodb using mongoose?

Why you need indexing? Where that is stored and what you mean by schema object? For what purpose we are using view?

957

How many files can a database contain in sql server?how many types of data files exists in sql server? How many of those files can exist for a single database?

1211

Mention what are the different types of ssrs reports?

158

What port does pgadmin use?

851

How to execute a function in postgresql?

967

How to use case expression?

1013

Is mongodb a documentdb?

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