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Home / Interview Subjects / Redis Cache
WithoutBook LIVE Mock Interviews Redis Cache Related interview subjects: 24

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Know the top Redis Cache interview questions and answers for freshers and experienced candidates to prepare for job interviews.

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Intermediate / 1 to 5 years experienced level questions & answers

Ques 1

Explain the Replication Features of Redis?

Replication is important in order to archive high level of availability in big data systems. The data needs to be replicated at n number of places. This follows the master-slave approach where the master copy is maintained by master-slave and replicated to n other nodes.

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Ques 2

What are the advantages of using Redis?

Following is a list of some important advantages of Redis:

  • Redis is very fast.
  • It supports a server-side locking.
  • It has a rich client side library.
  • It is a good counter.
  • It supports Atomic Operation.
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Ques 3

What are the disadvantages/limitations of using Redis?

Following are the disadvantages/ limitations of Redis:

  • It is single threaded.
  • It has got limited client support for consistent hashing.
  • It has significant overhead for persistence.
  • It is not deployed widely.
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Ques 4

What is the difference between Redis and RDBMS?

There are a lot of differences between Redis and RDBMS:

  • Redis is a NoSQL database while RDBMS is an SQL database.
  • Redis follows the key-value structure while RDBMS follows the table structure.
  • Redis extremely fast while RDBMS is comparatively slow.
  • Redis stores all the dataset in primary memory while RDBMS stores its dataset in secondary memory.
  • Redis is generally used to store small and frequently used files while RDBMS is used to store big files.
  • Redis provides only official support for Linux, BSD, Mac OS X, Solaris. It doesn?t provide official support for Windows currently while RDBMS provides support for both.
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