React Core Concepts
How React decides to re-render, and the state and list mistakes that follow from misunderstanding it.
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- 7 questions
- ~5 mins
Answer order is shuffled each attempt. Your results are saved only in this browser.
What this quiz covers
State, props, keys and rendering.
- State
- Lists
- Props
- Rendering
- Forms
- State design
React learning roadmap
See where this quiz fits from beginner to expert.
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How this works
Practice or exam mode
Practice mode explains each answer straight away. Exam mode holds all answers until you finish, then shows a full review.
Shuffled answer order
Options are shuffled on every attempt, so you learn the idea rather than the position of the right letter.
Timer, flags and skips
A timer runs while you play. Flag questions to revisit them, or skip and come back from the question navigator.
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