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If you are preparing for an interview, you must master the concepts covered in both Volume 1 and Volume 2: Focus Area Vertical vs. Horizontal, Load Balancers, Sharding. Databases SQL vs. NoSQL (Cassandra, DynamoDB), ACID vs. BASE. Caching Redis, Memcached, Cache eviction policies (LRU, LFU). Asynchronism Message Queues (Kafka, RabbitMQ). Networking HTTP vs. WebSockets, CDN, DNS. Distributed Systems Leader Election, Consensus Algorithms (Paxos/Raft). 4. How to Use These Resources Effectively However, there is a legal way to get

Choosing structured, ACID-compliant databases (PostgreSQL, MySQL) versus scalable, schema-less options (MongoDB, Cassandra, DynamoDB). If you are preparing for an interview, you