Learn DSA and core CS one small step at a time.
A staircase from “what is an array” to dynamic programming, then DBMS, operating systems, computer networks and OOP. Every step teaches one idea, then gives you one problem or quiz built for it, so the climb never feels steep.
Every topic and every step is free. No card needed.
New to coding? Start with the basics
1 + 11 = 12 is too big, so right moves one step left.
Hover to pause, or use the arrow keys.
How every step works
Four short phases, about 8 minutes in all.
- 1. LearnOne idea, with a visual you can step through.
- 2. CheckA 30-second question before you practise.
- 3. SolveOne problem or quiz built for that idea. Hints if you’re stuck.
- 4. ReflectSee the pattern so you spot it next time.
A staircase, not a problem list
A problem list
- Hundreds of problems, you pick the order
- The teaching lives in a separate video
- Big jumps between easy and medium
- Stuck? Read the solution
DSA Factory
- One next step, always chosen for you
- One idea taught right before its problem
- Steps small enough that you don’t notice the climb
- Stuck? A nudge, then a smaller problem, then back
After DSA, the subjects interviews ask next
Same small steps, same help when you’re stuck. Write real SQL, trace transactions and schedules, and learn the answer you’d give out loud.
Small steps
Every step teaches one idea, then gives you one problem or quiz built for it.
Help when you’re stuck
Hints that unlock in order, smaller bridge problems, and feedback that never blames.
Built for placements
DSA in Python, C++, Java or JavaScript, plus the DBMS, OS, networks and OOP questions interviews ask next.
Not ready to start yet?
Join the list. We’ll email you when something new opens, like the System Design track.
Questions
I’ve never done DSA. Is this for me?
Yes. If you’ve never coded, start with Programming basics, which teaches loops and functions the same gentle way. If you can already write basic loops and functions in one language, start with arrays.
Is there more than DSA?
Yes. DBMS, operating systems, computer networks and OOP are all open, the core CS subjects interviews ask after DSA. They use the same small steps: real SQL queries to write, small simulations to code (CPU scheduling, page replacement, subnetting) and short questions that trace and apply each idea.
How is this different from a problem list?
A problem list gives you questions. DSA Factory teaches each idea right before a problem built for it, and helps you when you’re stuck, so the jumps never feel too big.
What’s free?
Everything, for now: every subject, topic and step, from Programming basics and dynamic programming to DBMS, operating systems, networks and OOP. No card needed.
Which languages can I use?
Python, C++, Java and JavaScript for coding problems, and SQL for the DBMS queries. You can switch language any time, even in the middle of a step.
Your first step takes about 4 minutes.
Try it now. Sign up only if you want to keep going.
Try step 1