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Quick Start

This five-minute walkthrough takes you from a fresh visit to a completed coding drill: sign in with Google, choose a track, solve a drill in the in-browser editor, run the hidden tests, and reveal the reference solution. No setup, no install, no payment.

Step 1 — Open the app and sign in​

  1. Go to interviewpai.aoneahsan.com.
  2. Click Continue with Google on the login screen.
  3. Approve the Google consent prompt. PrepAI creates your account automatically on first sign-in (there is no separate sign-up form). See Accounts & sign-in for details.

Step 2 — Pick a track and a drill​

  1. From the dashboard, open Learn → Tracks (or go to /learn/tracks).
  2. Choose a language track — for example JavaScript or TypeScript.
  3. Open a topic, then pick a drill from the list. Each drill card shows its title, difficulty, and your progress.

Step 3 — Solve it in the editor​

Every drill opens with a code editor (CodeMirror by default; you can switch to Monaco in settings) pre-filled with starter code — usually a function signature with a // TODO. Read the problem statement and the expected output examples above the editor, then implement your solution.

// Example starter code
function twoSum(nums, target) {
  // your solution here
  return [-1, -1];
}

Step 4 — Run the hidden tests​

Click Run. Your code executes locally in a sandboxed Web Worker (it never leaves your device) and is checked against the drill's assertSource tests — typically six to eight cases per drill. You'll see which cases pass and which fail, with the actual versus expected output.

Stuck? Each drill ships layered hints and a three-tier guide, so you can get a nudge without jumping straight to the answer.

Step 5 — Reveal the solution and record progress​

Once your tests pass — or after at least one genuine attempt — reveal the reference solution and read the complexity analysis and follow-up questions. Your completion is saved to your account, so the drill is marked done and your streak and stats update on the dashboard.

What to do next​

GoalWhere to go
Rehearse a full interviewMock interviews
Get feedback on your codePeer reviews
See your progressDashboard & analytics
Use a quick utilityDeveloper tools

Troubleshooting​

  • The Google popup is blocked. Allow popups for interviewpai.aoneahsan.com, or use the redirect fallback the app offers. On the installed mobile app, native Google sign-in is used instead.
  • My code times out. Drills run with a time budget so infinite loops don't hang the tab. Check for an unintended loop and run again.
  • Tests fail on edge cases. Read the expected-output examples carefully — empty inputs, negatives, and duplicates are common gotchas built into the test set.