Redis Interview Questions

#What is Redis?

Redis is an advanced key-value data store and cache. It has is also referred to as a data structure server as such the keys not only contains strings, but also hashes, sets, lists, and sorted sets.

#What are the data types available in Redis

• LIST
• SET
• SORTED SET
• HASHES
• STRING
• STREAMS

#How to insert a record in Redis.

#List Out The Operation Keys Of Redis?

Operation keys of Redis includes:

• TYPE key
• TTL key
• KEYS pattern
• EXPIRE key seconds
• EXPIREAT key timestamp
• EXISTS key
• DEL key

#How to set the expiration of keys in Redis.

• Method 1 using EXPIRE If you want your key abc to expire in 10 seconds then

  EXPIRE abc 10
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• Method 2 Using SETEX This method will set the key with time. And its atomic.

  SETEX abc 10 "changed-value"
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• Set with EX

  SET anotherkey "will expire in a minute" EX 60
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