What is Redis primarily used for?

• File storage
• Document editing
• In-memory data store
• Email sending

What data structure does Redis use for key-value pairs?

• Tree
• List
• Hash
• Table

Which command sets a string value in Redis?

• SET
• GET
• PUSH
• ADD

Which command retrieves a value by key in Redis?

• GET
• SET
• HGET
• LPUSH

Which command deletes a key in Redis?

• DEL
• REMOVE
• DELETE
• ERASE

Which command appends a value to a string?

• APPEND
• ADD
• SETEXT
• CONCAT

What does the EXPIRE command do?

• Deletes key immediately
• Makes key persistent
• Sets TTL on a key
• Extends key forever

Which command returns the number of elements in a set?

• SCOUNT
• SCARD
• SETLEN
• SIZE

What does Redis WATCH command do?

• Monitors key for updates
• Schedules key deletion
• Tracks memory
• Initiates Pub/Sub

Which command starts a transaction block?

• BEGIN
• MULTI
• START
• EXEC

What does Redis Sentinel primarily provide?

• Security
• Monitoring
• High Availability
• Authentication

Which command adds a message to a stream?

• XPUSH
• XADD
• XWRITE
• XSET

In Redis Cluster, how many hash slots are there?

• 512
• 1024
• 16384
• 32768

Which command reads messages from a stream for a consumer group?

• XGROUP
• XREAD
• XREADGROUP
• XGET

What is the purpose of Lua scripting in Redis?

• Styling
• UI Automation
• Atomic Execution
• Graphing