What is the primary advantage of using Redis HyperLogLogs over traditional sets for cardinality estimation?
HyperLogLogs support range queries on the stored elements.
HyperLogLogs allow for storing duplicate elements.
HyperLogLogs consume significantly less memory for large cardinalities.
HyperLogLogs provide exact cardinality counts.
What type of data structure is used internally by Redis Geospatial Indexes?
HyperLogLog
Bitmap
Sorted Set
Hash
Which Redis command is used to retrieve geospatial points within a specified radius?
GEORADIUS
GEODIST
GEOSEARCH
GEOADD
Which of the following is NOT a typical use case for integrating Redis with a SQL database?
Storing large blobs of unstructured data like images or videos.
Implementing a real-time leaderboard by leveraging Redis' sorted sets.
Offloading write operations from the database to handle high traffic.
Caching frequently accessed data to improve read performance.
You want a Redis key to expire in exactly one hour. Which command, along with the appropriate arguments, would you use?
SETEX key 3600 value
EXPIRE key 3600
TTL key 3600
PERSIST key 3600
What is a primary benefit of using Redis Hashes for storing related pieces of data instead of separate Strings?
Improved data security
Automatic data sorting
Faster key lookups
Reduced memory footprint
You have a key named 'temp:data' with an expiration time set. How would you remove the expiration time and make the key persist indefinitely?
There is no way to remove the expiration time once set
PERSIST temp:data
EXPIRE temp:data 0
TTL temp:data -1
In what scenarios would optimistic locking using WATCH be preferred over traditional locking in Redis?
WATCH
When minimizing latency and maximizing concurrency are crucial.
When the likelihood of concurrent modifications is very high.
When the operations within the transaction are very time-consuming.
When data consistency is not a major concern, and some data loss is acceptable.
Which tool is used to orchestrate and manage the nodes in a Redis Cluster?
redis-cli
redis-benchmark
redis-trib.rb
redis-server
What is the purpose of using a tool like 'Redis-benchmark' in a CI/CD pipeline?
To automatically back up and restore Redis data at scheduled intervals.
To visualize the real-time performance metrics of a Redis instance.
To configure and manage Redis clusters across multiple regions.
To simulate realistic workloads and assess Redis performance.