React Testing and Debugging

Question 1

What is React Testing Library?

Accepted Answer

A testing utility that encourages testing components the way users interact with them, focusing on behavior over implementation

Answer

A library of test examples

Answer

A debugging tool

Answer

A code linting tool

Question 2

What is Jest?

Accepted Answer

A JavaScript testing framework commonly used with React that provides assertions, mocking, and code coverage

Answer

A comedian

Answer

A build tool

Answer

A CSS framework

Question 3

What are React DevTools?

Accepted Answer

A browser extension that lets you inspect React component hierarchy, props, state, and performance

Answer

Physical development tools

Answer

A build system

Answer

A code editor

Question 4

What is a snapshot test?

Accepted Answer

A test that renders a component and compares the output to a previously saved reference to detect unintended changes

Answer

A photograph test

Answer

A performance test

Answer

A visual test only

Question 5

What is error boundary in React?

Accepted Answer

A component that catches JavaScript errors in child components, preventing them from crashing the entire app

Answer

A fence around errors

Answer

An error type

Answer

A debugging tool

Question 6

What is StrictMode in React?

Accepted Answer

A development tool that highlights potential problems by running additional checks and warnings

Answer

A production mode

Answer

A testing mode

Answer

A performance mode