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Learn today.
Build tomorrow.

Step-by-step tutorials, practice problems with a real judge, mock tests and placement material — all in one place, and free to read.

Start learning Take a mock test
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# Your learning journey starts here
for i in range(5):
    print("Keep learning!")
Run it yourself
Practise in your browser.
Nothing to install.
Registrations open ₹1,00,000 prize pool 22 Oct – 4 Nov

Build something
that actually ships.

FirstHack 2026 — a 36-hour online hackathon built for first-year students.

Register — ₹400 See the prizes
Prize pool
₹1,00,000
Certificate for every team that submits
Open to every branch and every stream
Solo entry allowed, with a prize of its own
Ambassador applications open

Run FirstHack at your college.

Tell your batch about it, answer the obvious questions, help people find teammates. Realistically 2–4 hours of work in total.

Apply as an ambassador What it involves
No quota to hit, and nothing to pay — ever.
Campus Ambassador FirstHack 2026
Your name here Your college · your batch
Signed certificate of appointment
Free registration for yourself Cash for every paid sign-up from your college A direct line to the organisers
For colleges & companies

A watched test, on their own laptops.

Camera, microphone and full screen are watched, a photograph is taken at every event, and you see the whole batch on one wall. Nothing to install.

Set up a college account Talk to us
A report per student, with the evidence attached — not a verdict.
The live wall as they sit
Camera & microphoneon
Full screen watchedon
Photo at every eventkept
Report per studentready
Free practice

Practise these questions for free.

20 problems, judged against hidden test cases the moment you press submit — the same way a company’s online assessment does it. No account needed to solve them.

Solve a problem Open the compiler
Your submission judging
Sample 1passed
Sample 2passed
Hidden test 1passed
Runtime142 ms
0 courses From the first line
0 problems Judged automatically
0 mock tests Timed, like the real thing
0 companies How each one hires
Compiler Five languages, no setup

Popular courses

View all
Free

C Programming From Zero

For the first-year student who has never written a line of code

Beginner 6 lessons
Free

Pointers and Memory in C

The topic that decides whether C makes sense to you or not

Intermediate 6 lessons
Free

C++ and STL Essentials

For students who know C and need C++ for DSA, labs and contests

Intermediate 6 lessons
Free

Java Fundamentals

For the student meeting Java in second year and in every campus test

Beginner 6 lessons
Free

Python for Engineering Students

Your first real programming language, taught the way a B.Tech student needs it

Beginner 6 lessons
Free

Data Structures in C

Build lists, stacks, trees and hash tables yourself, in the language that hides nothing

Intermediate 6 lessons
Free

Algorithms and Complexity

Big-O, searching, sorting, recursion, greedy and DP - with the maths actually explained

Intermediate 6 lessons
Free

DSA Interview Patterns

Six patterns that cover most array and string rounds in campus interviews

Intermediate 6 lessons

How this works

Three steps, in this order. Most people who get placed out of a first-year start did exactly this and nothing cleverer.

1

Read a track end to end

Short lessons in order, each one finishing what it starts. No video, nothing to install, and you can read every word without an account.

Browse the tracks
2

Write code and get judged

Solve a problem, press submit, and find out in seconds whether it actually works — against the same hidden tests a company would use.

Start practising
3

Sit a paper with a clock on it

A timed mock test in the shape of a real campus assessment, so the first one you sit for marks is not the first one you have ever sat.

Take a mock test

Start with the first lesson. Right now.

Every tutorial and every practice problem is free to read and free to solve, with no account. Make one only when you want your progress, your streak and your rank kept.

Start learning Create a free account