Free lesson · DSA Mastery - Interview Prep, End to End
How to Use This Course
How to Use This Course
Six hundred and seventy three topics is a lot. Some of you will read every word; most of you will not - and most of you should not, depending on your goals. This page tells you how to actually use the course based on where you are starting from and how much time you have.
The course is structured as both a learning path (read in order, build up) and a reference library (skip to what you need). Both modes work; the right one depends on you.
Three modes of using this course
There are three ways people get value out of this course, and they look very different in practice.
graph LR
A["You"] --> B{"What is your goal?"}
B -->|"Learn from scratch"| C["Linear Path"]
B -->|"Specific weak spot"| D["Reference Library"]
B -->|"Mock prep for loop"| E["Spaced Review"]
C --> F["Sections 1-32 in order"]
D --> G["Jump to module by topic"]
E --> H["Tier 0/1/2 from priority guide"]
style A fill:#4338ca,stroke:#6366f1,color:#f1f5f9
style B fill:#b45309,stroke:#f59e0b,color:#f1f5f9
style C fill:#4338ca,stroke:#6366f1,color:#f1f5f9
style D fill:#4338ca,stroke:#6366f1,color:#f1f5f9
style E fill:#4338ca,stroke:#6366f1,color:#f1f5f9
style F fill:#16a34a,stroke:#10b981,color:#f1f5f9
style G fill:#16a34a,stroke:#10b981,color:#f1f5f9
style H fill:#16a34a,stroke:#10b981,color:#f1f5f9
The course works in three modes: linear path for from-scratch learners, reference library for fixing weak spots, and spaced review for interview-loop preparation. Pick the one that fits your situation.
Mode 1: The linear path
If you are new to DSA or your fundamentals are shaky, work through the course in order. Sections 1 through 4 are foundations. Sections 5 through 32 build progressively, with later sections leaning on earlier ones.
Realistic pace: one or two sections per week, with active practice. The whole course at this pace takes 4 to 8 months. That is not a sprint; treat it as the academic semester you wish you had taken.
Mode 2: Reference library
If you already know the fundamentals but have specific weak spots (you always get stuck on backtracking, or graphs, or DP), skip to those sections. Each section is self-contained enough to read on its own.
Use the curriculum.md file at the top level as your index. Find the topic you want, jump to it, read.
Mode 3: Spaced review for an imminent loop
If you have an interview in 2 to 4 weeks, do not try to read the whole course. Go to practice problem sections and pick top 75 questions, which divides all 673 topics into four tiers. Focus on Tier 0 and Tier 1 first - those are the must-know-cold topics that appear in nearly every loop.
A realistic 4-week plan: Tier 0 in days 1 to 3, Tier 1 in days 4 to 10, Tier 2 in days 11 to 25, mock interviews and review in days 26 to 28. Adjust based on where you start.
Interactive animation: Four weeks - Tier 0 in days 1 to 3, Tier 1 by day 10, Tier 2 by day 25, then mocks.
Active reading vs passive reading
Here is the single most important rule, regardless of mode: read actively, not passively.
Passive reading is what you do with a novel. You read the words, you nod along, you turn the page. With a DSA course, this gets you almost nothing. You will finish each topic with a vague sense of having "covered" it and zero ability to reproduce the code under pressure.
Active reading looks different. You read a topic until you understand the problem. Then you close the page. You write the code yourself, from scratch, without looking. If you get stuck, look only at the section you got stuck on, then close it again and continue. After you have working code, compare it with the topic's solution to spot inefficiencies. Then move on.
This is slower per topic, but it sticks. Three topics actively read are worth twenty topics passively read.
Interactive animation: Read actively - understand the problem, close the page, write the code from scratch, then compare with the solution.
Multi-approach format
Most algorithmic problem topics in this course present multiple approaches: a brute force, a better approach, the optimal. The pattern is intentional. In a real interview, you should almost always start by articulating the brute force out loud, then immediately explain why it is too slow and what you will do instead.
When you read a multi-approach topic, do not skip to the optimal. Read brute-force first. Understand why it works. Articulate to yourself why it is too slow. Then read the improvement - see if you can guess the improvement before reading the answer. Then move to the optimal.
This exercises the muscle interviews actually test: the ability to navigate the solution space, not just to produce a final answer.
Interactive animation: Read the approaches in the order an interview runs - brute force, then better, then optimal, guessing each before reading.
Practice problems
The course explains topics; We have 600+ questions listed on our platform practice section, lets you practice. After reading a topic, find a few problems that match the pattern and solve them in a timed setting. Aim for 20-40 minutes per problem the first time; faster as you build muscle.
Interactive animation: The platform's top navigation, where the DSA practice section holds the 600+ problems to solve after each topic.
Pacing yourself
DSA prep is a marathon, not a sprint. Two hours a day for a month beats sixteen hours a day for four days. Spaced repetition - coming back to a topic 1 to 2 weeks later - beats one-time intensive study.
Set a sustainable schedule. Track which topics you have read and which you have practiced. Revisit weak spots before each mock interview.
The next topic in this section covers the mental side: how to maintain focus and avoid burnout over weeks of preparation. Read it next.