Operating Systems for MAANG Interviews

A book-shaped table of contents for operating systems at MAANG interview depth: foundations through processes, threads, concurrency, CPU scheduling, memory management, file systems, I/O, security & isolation, Linux internals, cloud/Kubernetes/observability, advanced kernel topics, and interview preparation — cross-linking existing sre/linux-networking, kubernetes-security, and patterns/concurrency notes instead of duplicating them.

1 — Lock-Free Programming

Covers compare-and-swap (CAS), the ABA problem, hazard pointers, and RCU.

2 — NUMA Systems

Covers memory locality, CPU pinning, and NUMA-aware scheduling.

3 — Kernel Synchronization

Covers spinlocks, RCU, seqlocks, wait queues, softirqs, and tasklets.

4 — High Performance I/O

Covers zero-copy I/O, sendfile(), splice(), mmap(), and io_uring.