Online Aptitude Test Platform with Timed Mocks and Analytics

Placement aptitude rounds eliminate more candidates than any other stage, yet most students prepare from static PDFs with no sense of time pressure and no measurement of where their marks leak. Existing quiz tools rarely combine a realistic timed environment with analytics: a student cannot tell whether a low score comes from weak concepts, slow solving, or poor time allocation across quantitative, logical and verbal sections. This project builds a web platform that reproduces the pressure of a real test — a 20-minute countdown with automatic submission, a question palette with flag-for-review, and per-question timing — then converts every attempt into actionable analytics: score, section-wise accuracy, average time per question, a percentile against a sample cohort, and a full question-by-question review where each answer is paired with its worked solution. The bank ships with 36 original questions, each with four options and a step-by-step solution.

1. The mock loads a fixed 20-question paper — 7 quantitative, 7 logical reasoning, 6 verbal — drawn from the 36-question bank, and starts the 20:00 countdown.
2. A one-second interval drives the timer; every Previous/Next or palette jump stamps the dwell time onto the question being left.
3. The palette re-renders from a single state object, so the answered, flagged and current indicators always match the underlying answers.
4. At 0:00 the test auto-submits (early manual submit is also available); a grading function compares each selection against the bank's answer keys.
5. The dashboard aggregates score, per-section correct/total tallies, average and total time, and the skipped count.
6. The percentile is computed by ranking the score against the built-in 240-entry sample cohort (simulated data, labelled as such in the UI).
7. The review section lists every question with your answer, the correct answer, time spent and the worked solution for study.

Tech stack:

• HTML5, CSS3
• Vanilla JavaScript (ES6)
• Single-file SPA with hash routing
• Node.js · Express (ordered full-stack build)
• PostgreSQL (ordered build)
• JWT authentication (ordered build)
• REST API between front end and services (ordered build)

• [Timed mock engine] 20 questions against a 20-minute countdown with automatic submission at zero. The timer turns red in the final two minutes, reproducing real test pressure.
• [Question palette] A 20-cell palette shows answered, flagged and current states at a glance, with click-to-jump navigation between questions.
• [Per-question timing] Dwell time is stamped on every navigation event, so the results page reports exactly how long each question took.
• [Analytics dashboard] Score out of 20, section-wise accuracy bars, average and total time, skipped count, and a percentile ranked against the built-in sample cohort.
• [Worked-solution review] Every question is reviewed with your answer, the correct answer, time spent and a step-by-step worked solution.
• [Practice mode] Untimed single-question practice with instant correct/incorrect feedback and the solution revealed immediately.
• [Question bank browser] All 36 questions browsable and filterable by section, difficulty and keyword, with expandable solutions.
• [36 original questions] 12 quantitative, 12 logical reasoning and 12 verbal questions written originally for this project — nothing copied from question-bank sites.

• Working front-end prototype (single HTML file): timed mock, practice mode, question bank browser, analytics dashboard
• 36 original aptitude questions with worked step-by-step solutions
• Project report PDF (background, methodology, architecture, question bank design, results)
• PPT presentation for final review
• Viva Q&A preparation document (timer engine, grading logic, percentile computation, full-stack extension)
• Setup and customization guide
• Full-stack extension blueprint: backend API, auth design and database schema for the ordered build

• The prototype is front-end only: no user accounts and no persistent attempt history — both ship with the ordered full-stack build.
• The question bank is fixed at 36 original questions in the prototype; bulk import and an admin panel are part of the ordered build.
• The percentile compares against a built-in 240-entry sample cohort (simulated data), not live test-taker data — stated openly in the UI.
• The 20-question / 20-minute paper format is a design target; the ordered build parameterizes paper size and duration.
• No proctoring features (tab-switch detection, webcam checks) in the prototype — listed as future scope.
• The countdown depends on the browser tab staying active; background tab throttling on some browsers can slow the timer — documented in the setup guide.