
IT13 (Quiz 2)

Quiz
•
Information Technology (IT)
•
University
•
Easy
Eric John Manzo
Used 14+ times
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is JSX?
A type of JavaScript library.
A database query language.
A syntax extension for JavaScript that looks like HTML.
A tool for debugging.
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is the primary advantage of the Virtual DOM in React?
It allows for direct manipulation of the real DOM.
It efficiently calculates and applies the minimum number of changes to the real DOM.
It makes all components reusable.
It automatically handles all server-side logic.
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
The fundamental building blocks of a React application are called:
Variables
Functions
Components
Classes
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which command is used to start a new React project with a pre-configured build environment?
npx create-react-app my-app
npm install react
npm start
npm build
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
In React, what does npm start do?
Installs new dependencies.
Creates a new React project.
Starts the local development server.
Compiles the code for production.
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is the main difference between functional and class components in modern React?
Functional components cannot handle props.
Class components are simpler and more concise.
Functional components are defined as functions and use hooks, while class components use ES6 classes.
Class components are not supported anymore.
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is the purpose of the render() method in a class component?
To manage component state.
To fetch data from an API.
To return the JSX for the component.
To define the component's styling.
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