Algorithm challenges
Choose a language, write a solution in the Monaco editor, and run it against visible and hidden test cases.
- Judge0 execution
- Multiple languages
- Submission history
Learn programming by solving and building.
Move from guided courses to algorithm and frontend challenges, run real tests in the browser, and turn every accepted solution into visible progress.
Live preview
Frontend challenge
Task dashboard
Build filtering, search, and completion states using the provided task data.
JavaScriptHTMLCSS
1const visibleTasks = tasks.filter((task) =>
2 task.title.toLowerCase().includes(search) &&
3 (filter === "all" ||
4 task.status === filter)
5);
3 visible testsAll passing
Tests
3 passedRenders every task
Filters completed tasks
Updates the task summary
Hidden tests run on submit
Practice more than one kind of coding.
CodeQuest brings problem solving and interface building into the same learning platform, so progress is based on code that actually runs.
Frontend challenges
Build interfaces with HTML, CSS, and JavaScript while the preview and automated browser tests update beside your code.
- Live preview
- Behavior tests
- Visual comparison
A complete loop from lesson to feedback.
Learn a concept, check it with a quiz, put it into code, and use the result to decide what to practice next.
Follow a course
Work through organized modules and practical lessons.
Check your understanding
Use quizzes and explanations before moving forward.
Practice in the editor
Apply the same ideas in a challenge with real tests.
Learn from the result
Review output, test failures, and accepted submissions.
Java fundamentals
Learning path
Variables and data types
Lesson completeControl flow
Quiz passedCollections
Practice challengeFinal assessment
LockedProgress that reflects the work.
The dashboard connects learning activity to rewards and achievement, without separating practice from progress.
XP and levels
Accepted work moves your learner profile forward.
Coins and stars
Earn rewards and use coins to unlock challenge hints.
Rankings
Compare progress through the platform leaderboard.
Badges
Collect achievements tied to real milestones.
Start free. Unlock more when you need it.
Explore the learning platform before choosing paid content. When a course or plan requires payment, CodeQuest opens a Bakong KHQR checkout and unlocks access after confirmation.
View access optionsAccessFreePro
Practice challenges
Join free courses
Premium learning content-
Bakong KHQR checkout-
Pay from a Bakong or KHQR-supported banking app.
Turn the next concept you learn into code that works.
Create an account, choose a course or challenge, and let the test results guide your next step.