Practice mode • Infinite or fixed questions
Play a quiz by topic
Pick a topic and quiz, choose 5/10/infinite mode, and review explanations as you go.
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How it works
Choose a topic and go
- 1. Pick any topic and subtopic—no account required.
- 2. Select 5, 10, or infinite questions with an optional timer.
- 3. Submit to see your score, review answers, and retake wrong-only.
Sample question
What it looks like
Q: What is the time complexity of binary search?
- A) O(n)
- B) O(log n) Correct
- C) O(n log n)
- D) O(1)
Explanation: Binary search halves the search space each step, giving logarithmic time complexity.
FAQ
Regular quiz questions
Do I need to sign in?
No. Pick a topic and start immediately—progress is stored locally until you reset.
What modes can I use?
Choose 5 or 10 questions for a quick run or infinite mode for continuous practice, with an optional timer.
Can I review answers?
Yes. After submitting you can see correct answers, explanations, and retake only missed questions.
Are topics updated?
Topics and question banks are regularly refreshed with new sets and explanations.