Work / Research / AWS CLF-C02 Practice
741
questions · CLF-C02 · free · loads on 2GBuilt in one night.
Used the next morning.
Most AWS practice tools cost $99 and never simulate the real exam. Candidates fail on the format, not the content. This rig is four pages, no build step, no backend. It runs from file://. It mirrors Pearson VUE OnVUE end to end. The whole 741-question corpus loads in two seconds.
Act I · The Problem
Practice tools sell the wrong product.
The CLF-C02 exam is delivered through Pearson VUE OnVUE under NDA. It has a check-in, a timer, an item-review screen, a mark-for-review flag, scaled scoring. Most $99 question banks do none of that. Candidates show up trained for a different test.
i
$99 for the wrong format.
Question banks sell PDF dumps and call themselves a simulator. The exam day muscle memory · review screen, timer pressure, the feel of the OnVUE shell · is missing.
ii
2G candidates fail to load.
Most practice apps ship megabytes of JS, fonts, telemetry. From a tier-3 town on a 2G connection, they never finish loading. This rig is HTML + a single JSON corpus.
Act II · The Promise
Four pages.
Each one a study mode.
Every page works on file://. Every page works offline. Every page is one job.
| Page | Purpose |
|---|---|
| Landing. Links to every mode. The fastest path between "I have ten minutes" and "I am studying". | |
| pages/cheatsheet.html | A 30-minute distilled cheat sheet. Nine always-pick rules. Shared Responsibility model. Every service. Support plans. The gotchas that catch good candidates. |
| pages/study.html | All 741 Q&A with options and the correct answer highlighted. Search. Three-way sort: question number, A→Z, most-tested-first. |
| pages/minimal.html | Q→A only. Grouped by answer. ARIA-aware so Edge Read Aloud reads only the Q&A. Reader Mode friendly. Two-way sort. |
| pages/exam.html | Pearson VUE OnVUE simulator. 65 questions. 90-minute timer. NDA screen. Check-in flow. Mark for Review. Item Review screen. Scaled 100-1000 scoring. |
65
Questions per attempt
90:00
Minutes on the clock
100-1000
Scaled score range
NDA
+ Check-in + Item Review
Act III · The Corpus
741 questions. One JSON.
A small Python parser does the unglamorous work, so the browser pages can stay simple.
step 1
pdftotext -layout
The source PDF is dumped to source/dumps.txt with layout preserved, so question numbers and option markers stay aligned column-wise.
step 2
parse.py
Splits on Question:N markers, extracts options, the correct answer letter and explanation, emits questions.json.
step 3
data.js
The JSON is wrapped as window.QUESTIONS = … so every page loads it as a script tag · no fetch, no CORS, no build.
step 4
file:// works.
Open directly from disk. Everything still works. This is the only way some candidates will ever run it.
The Stack
No frameworks. No build. Pure-black dark theme.
- Pure HTML / CSS / JS
- Single JSON corpus
- localStorage
- ARIA · Edge Read Aloud
- Reader Mode friendly
- Python parser (offline)
- GitHub Pages hosting
- file:// compatible
Act IV · Proof
Live. Open. Public.
divyamohan1993.github.io/aws-clf02-practice/
The whole rig is on GitHub Pages. No login. No analytics. No upsell. Open the URL on any phone, study, close the tab, get certified.
localStorage · sort + resumable exams
Sort preference persists across visits. In-progress exams resume where you left off, including the timer position, marked items, and answer state.
TTS-optimized minimal mode
The minimal page is ARIA-tagged so Edge Read Aloud reads only the question and answer · perfect for revising during a commute.
Honest disclaimer
The 741 questions originate from a publicly circulated CLF-C02 dump. The site exists for self-study only. The actual AWS exam is delivered under NDA. The README says so, plainly.
Cert prep that doesn't gatekeep.
I build small, fast, free study tools that work on the worst phones in the smallest towns. Because the cert market shouldn't punish a 2G connection.