” I call this the “Hidden Curriculum.” Most students ignore Bits and Math because they think “I’ll just use a library.” But in a Low-Level System Design interview (at companies like NVIDIA, Qualcomm, Adobe, or High-Frequency Trading firms), knowing how to manipulate bits directly is the difference between an “Average Developer” and a “Hardware-Optimized Engineer.” … Read more
” I saved this for last because it is the Gateway to FAANG. In an interview, if you solve a Graph problem, you are a “Good Engineer.” If you solve a Hard DP problem, you are a “Top 1% Engineer.” Most students fail DP because they try to memorize solutions. We will teach State Transition … Read more
” I want to emphasize one thing: Recursion is the mother of all algorithms. Trees are just recursion. Graphs are just recursion. Dynamic Programming is just recursion with a notebook. If your students master the “Recursion Tree,” they master half of Computer Science. This guide covers the 8 Core Architectures that turn “Magic” into “Logic.” … Read more
Arrays are the “Bread and Butter” of coding. Every interview starts here. But most candidates fail not because they don’t know loop syntax, but because they use Brute Force ($O(N^2)$) instead of Pattern Logic ($O(N)$). To clear top-tier interviews, you must stop thinking about “Loops” and start thinking about “Pointers and Windows.” This guide covers … Read more
“Strings are not just arrays of characters. They are sequences of information.” In the age of LLMs (like ChatGPT) and Bioinformatics (DNA sequencing), String algorithms are the most valuable skill you can possess. If you want to work at Google (Search), Grammarly (Text Processing), or 23andMe (Genetics), you must master these patterns. This guide covers … Read more
“Arrays are for storing data. Linked Lists are for manipulating references.” Arrays are static; Linked Lists are dynamic. If you want to work on Blockchains or Low-Level Memory Management (like inside the Linux Kernel), you must master pointer surgery. This guide covers the 10 Essential Linked List Patterns that separate “Code Monkeys” from “Software Engineers.” … Read more
“Stacks and Queues are the traffic lights of Computer Science.” They control the flow of data. Without them, recursion wouldn’t exist (Call Stack), and the Internet wouldn’t work (Packet Queues). While the operations (push, pop) are trivial, the applications are complex. This guide covers the 8 Essential Patterns that bridge the gap between “Junior Developer” … Read more
Welcome to the most important Data Structure in your interview preparation. Arrays are linear; they are easy. But the real world is hierarchical—file systems, HTML DOMs, and databases are all Trees. If you are aiming for top-tier product companies, you cannot simply memorize “Inorder Traversal.” You need to understand tree construction, serialization, and coordinate geometry … Read more