FAANG Interview
Preparation Notebooks

A curated, self-contained study library covering every major interview domain — from complexity analysis to ML systems. Each notebook is a single HTML file with interactive visualizations. Press t for light mode.

Core Computer Science

01 · core

Data Structures & Algorithms

Complexity, arrays, trees, graphs, DP, sorting + advanced topics (Fenwick, persistent DS, suffix arrays, HLD, CHT, Treap).

13 modules48 viz7,331 L

02 · core

Database Systems

Relational + NoSQL, indexing, ACID, 2PL/MVCC, replication, sharding, distributed DBs, caching.

13 modules18 viz6,016 L

03 · core

Computer Networks

OSI, TCP/UDP, sliding window, congestion, DNS, HTTP/2-3, TLS 1.3, BGP, CDN.

9 modules19 viz5,044 L

04 · core

Operating Systems & Concurrency

Processes, memory, scheduling, sync primitives, deadlock, file systems, epoll, memory models, ABA.

10 modules14 viz4,154 L

Systems & Design

05 · design

System Design (HLD)

Back-of-envelope, CAP/PACELC, load balancing, caching, messaging, APIs. 10 case studies: URL shortener through Instagram Stories.

13 modules43 viz5,615 L

06 · design

OOP & Low-Level Design

SOLID, 12 GoF patterns, UML, 9 LLD problems (parking lot, LRU, rate limiter, Splitwise, BookMyShow, …).

8 modules31 viz4,325 L

07 · design

ML Systems Design

Feature stores, embeddings, ANN, recommenders, ranking, LLM serving, training pipelines, case studies (YouTube, TikTok, ads).

10 modules7 viz2,997 L

Practice & Reference

08 · practice

Practice Problems

80+ curated FAANG-tier problems with multi-approach solutions, complexity trade-offs, and two 45-min mock interview walkthroughs.

12 modules75 cx-badges4,035 L

09 · reference

Git Internals & Workflow

Object model, refs/HEAD, merge vs rebase, rewriting history, recovery, bisect, hooks, worktrees.

8 modules11 viz3,388 L

10 · reference

Languages — Cheat Sheets

Python / Java / C++ / Go / TypeScript idioms, stdlib, concurrency, interview-oriented quick-reference with complexity tables.

10 modulesPy/Jv/C++/Go/TS2,469 L

11 · reference

Security for SWE Interviews

Threat modeling, crypto, auth (OAuth/OIDC/JWT), RBAC/ABAC/ReBAC, OWASP defenses, TLS, secrets, zero-trust.

10 modules7 viz2,334 L

All notebooks share one design system + viz-lib runtime. Every visualization is declarative JSON — no external dependencies.

Total: 11 notebooks · ~48,000 LOC · ~210 visualizations · ~250 callouts · 155 complexity badges.

Built 2026-04. Source: /home/pranaav/Work/zero/scalar/system/