If you are preparing for a Caching interview, Must go through these questions series.Here you will find latest interview Questions and answers on Caching Frameworks and tools.
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Redis is free software, the data structure stored in memory, used as a broker for databases, caches, and messages. It actually supports data structures such as with strings, hashes, lists, sets, range query sorted sets, bitmaps, hyper logs, radius query and streams geospatial indexes.
Memcached is a memory caching system used to optimize dynamic database-driven webpages by caching data in RAM to minimize the memory calls to external data. It is free and open-source software, licensed under the Revised BSD license and runs on Unix-like operating systems and on Microsoft Windows and also, it depends on the lib-event library.
Memcached's APIs supplies a very huge hash table distributed across various machines and when the table is full, subsequent inserts cause older data to be purged in the least recently used (LRU) order and in addition to that, applications using Memcached typically layer requests and additions into RAM before falling back on a slower backing store.