Cheat sheets
Revise in minutes.
High-signal cards for night-before exams and interview warm-ups.
⚙️
OS
Operating Systems
Processes, threads, scheduling, memory, deadlocks — interview essentials.
Open sheet🗄️DBMS
DBMS & SQL
Keys, normal forms, transactions, indexes, and must-know SQL patterns.
Open sheet🌐CN
Computer Networks
OSI/TCP-IP, protocols, HTTP, and networking interview favorites.
Open sheet📦OOP
OOP Concepts
Pillars, SOLID, and how to explain design in interviews.
Open sheet🧩DSA
DSA Patterns
Pattern cheatsheet — recognize the problem shape faster.
Open sheet💻Tools
Git & Linux
Daily commands every intern and SDE should muscle-memory.
Open sheet