Databases · Junior · Question 57 of 75

What does `EXPIRE session:42 3600` do in Redis?

1Extends the key's value to 3600 characters
2Locks the key for 3600 seconds
✓Correct answer: Deletes the key automatically after 3600 seconds

Explanation

TTLs make Redis a natural fit for caches and sessions: old data cleans itself up. SET key value EX 3600 sets the value and TTL in one command.

Further reading

Redis: EXPIRE ↗

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