I’m learning to code
Start with values and decisions. Finish by explaining a small program.
See my starter plan →InterviewSolutionHub
Learn programming. Build skills. Prepare for your next role.
Explore practical programming guides, animated DSA and neural network games, coding lessons and interview preparation. Learn one useful skill at a time.
Try free practiceOne small win. Then your next step.
See an algorithm, find a bug or practise an interview story. No account needed.
Bubble sort visualizer
Compare two neighbours, follow each swap and see why the largest value settles at the end of a pass.
Python debugging gym
Work through six short Python mistakes, from a missing value to shared list references. Get an explanation after every choice.
STAR interview story builder
Outline a real example, rehearse it with an optional timer and download your answer. Your draft stays in this tab.
Find your starting point
I want to understand DSA
Build an explanation before memorising a solution.
See my starter plan →I’m preparing for an interview
Practise one clear explanation and build from the actual role.
See my starter plan →Before you begin
Clear answers. A clear next step.
Can I try it without signing up?
Yes. The Practice Lab visualizer, debugging exercises and interview story builder are open to everyone. An account is needed to save course progress, play scored games and use a private job workspace.
What is free, and what uses AI?
Guides, Practice Lab exercises and question-bank practice do not require AI generation. Personalised job analysis and Coach or Mock answer feedback use AI and have availability and plan limits.
Does completing a practice plan make me interview-ready?
A plan helps you practise consistently. It is not a certification, skills assessment or guarantee of an interview or offer. Use it to identify useful next steps and get feedback on your explanations.
Where are my Practice Lab answers stored?
The story builder keeps text only in the current tab until you copy or download it. Starter-plan checkmarks are stored on this browser when storage is available. They are separate from signed-in course progress.