Easy-level Protocol Buffers interview questions covering basics, syntax, and fundamental concepts. Q1: What are Protocol Buffers and why use them? Answer: Protocol Buffers (protobuf) is a language-neutral, platform-neutral extensible mechanism for serializing structured data. Key Benefits: Efficiency: Smaller size than …

Hard-level Protocol Buffers interview questions covering advanced topics, performance optimization, and complex scenarios. Q1: How does Protocol Buffer encoding work internally? Answer: Varint Encoding: Variable-length encoding for integers Smaller numbers use fewer bytes Most significant bit indicates continuation …

Medium-level Protocol Buffers interview questions covering advanced features, schema evolution, and best practices. Q1: How do you handle schema evolution and backward compatibility? Answer: Backward Compatibility Rules: Never change field numbers: 1// ❌ BAD: Changing field number breaks compatibility 2message User { 3 …