Interview Questions and Answers

While both are caching systems, Memcached is a simple key-value store, and Redis is a more feature-rich data store with support for data structures like sets and lists.

Memcached does not handle network partitions by default. Developers need to implement their own mechanisms, such as sharding and replication, to address network partition issues.

Cache stampede can be mitigated using techniques like setting short expiration times, implementing mutexes, or using lazy loading to refresh the cache.

Memcached servers can be secured by setting up firewall rules, using SASL (Simple Authentication and Security Layer), and configuring access controls to restrict unauthorized access.

Memcached is not thread-safe by default. To achieve thread safety, developers can use a separate Memcached instance for each thread or use a thread-safe library.