Jest Beginner Quiz
Master Jest basics including test structure, matchers, running tests, and assertions
Start the quizSample questions from this quiz
A preview of the style and depth. Try each one, then reveal the answer — or skip straight to the timed quiz.
1. What is Jest?
- A code editor
- A bundler
- JavaScript testing framework
- A build tool
Show answer
Answer: JavaScript testing framework. Jest is a delightful JavaScript testing framework with a focus on simplicity. Created by Facebook, it works with React, Vue, Angular, Node.js, and more.
2. How do you install Jest?
- Both a and b
- npm install --save-dev jest
- npm install jest --save-dev
- npm install jest
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Answer: Both a and b. Install Jest as dev dependency: npm install --save-dev jest or npm install jest --save-dev. Both commands are equivalent.
3. What is a test in Jest?
- Quality check
- Code validation
- Bug finder
- Function checking if code behaves as expected
Show answer
Answer: Function checking if code behaves as expected. A test is a function that checks if code behaves as expected. Uses test() or it() function with description and test function.
Frequently asked questions
How many questions are in this Jest quiz?+
30 questions, with a 45-minute time limit. Every question includes a written explanation of the correct answer.
Is this Jest quiz free?+
Yes. Every quiz on CodexQuizz is free and needs no account. You only enter a name if you choose to post your score to the leaderboard.
What level is the beginner quiz aimed at?+
Master Jest basics including test structure, matchers, running tests, and assertions
Can I use this to prepare for a Jest interview?+
Yes. The questions cover the topics that come up in Jest technical screens, and the explanations are written so that a wrong answer still teaches you the underlying concept.
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30 questions, 45 minutes. Free, no sign-up.
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