Free interview prep
Crack the interview loop.
Round by round.
Coding, machine coding, system design and behavioral: how each round runs, what interviewers score, and timed mock rounds to practise pacing.
Coding round →
43 problems in 11 patterns, with why each pattern matters.
0/43
Machine coding (LLD) →
10 problems with a 90-minute mock timer, runnable solutions and the follow-ups you'll get.
1 written
0/10
System design (HLD) →
27 systems with a 45-minute mock timer, explained the way interviewers probe them.
1 written
0/27
How to use it
- Run a mock. Every LLD and HLD chapter has an interview-mode timer with the real phases of the round. Solve it on paper or in a plain editor.
- Then compare. Open the solution and note what you missed. Those gaps are exactly what interviews find.
- Tick it off. Progress is saved in this browser, no account needed.