How do you delete a key-value pair in Redis where the key is 'city'?
DELETE city
REMOVE city
DROP city
ERASE city
After installing Redis, what command is commonly used to start the Redis server?
start redis
run redis
execute redis
redis-server
What does the TTL command return for a key that doesn't expire?
TTL
0
An error message
-1
-2
What is the purpose of the 'RPUSH' command in Redis?
Add an element to the tail of a list
Remove an element from the head of a list
Remove an element from the tail of a list
Add an element to the head of a list
How does Redis differ from a traditional relational database like MySQL?
Redis is primarily disk-based, while MySQL is in-memory
Redis is schema-less, while MySQL enforces a strict schema
Redis is not suitable for storing persistent data, while MySQL is
Redis is optimized for complex joins and queries, while MySQL is not
What happens if you try to rename a key to a name that already exists in Redis?
An error is returned, and the original key remains unchanged.
Redis creates a new key with a unique name.
The existing key is overwritten with the value of the renamed key.
The command is ignored.
You have a key with an expiration time set. If you overwrite this key with a new value using SET, what happens to the expiration?
SET
The expiration time is retained.
The expiration time is reset to its default value.
The expiration time is removed, making the key persistent.
An error occurs because you cannot overwrite an expiring key.
What Redis data type is best suited for storing a user profile with attributes like name, email, and age?
Hash
String
List
Set
Which AOF configuration option tells Redis to rewrite the AOF file periodically to reduce its size?
aof_compact_size
aof_rewrite_threshold
aof_optimize
aof_rewrite_frequency
Which method is used to check if a key exists in a Redis database using redis-py?
r.contains('mykey')
r.has_key('mykey')
r.check('mykey')
r.exists('mykey')