JavaScript Coding for Kids

Question 1

Which HTML element should the JavaScript be placed in?

Accepted Answer

Answer

JavaScript code is typically placed within `

Question 2

What is the correct JavaScript syntax for modifying the HTML element below?

Accepted Answer

document.getElementById("demo").innerHTML = "Hello World!";

Answer

This is the correct JavaScript syntax for accessing an HTML element by its unique ID and modifying its content. `document.getElementById("demo")` targets the specific HTML element that has the `id="demo"` attribute. The `.innerHTML = "Hello World!";` part then assigns the string "Hello World!" as the new HTML content inside that element.

Question 3

In JavaScript, how do you insert a comment?

Accepted Answer

Answer

In JavaScript, you can insert comments using two main syntaxes. Single-line comments start with `//` and comment out everything until the end of the line. For multi-line comments, you use `/*` to begin the comment block and `*/` to end it, allowing you to comment out multiple lines of code or descriptive text.

Question 4

How do you declare a variable in JavaScript?

Accepted Answer

var carName;

Answer

The `var` keyword is the traditional way to declare a variable in JavaScript. When you write `var carName;`, you are telling the JavaScript engine to create a variable named `carName`. While modern JavaScript also uses `let` and `const` for variable declaration, `var` remains a valid and fundamental method.

Question 5

In javascript, which operator is used to assign a value to a variable?

Accepted Answer

=

Answer

The `=` (equals sign) is the assignment operator in JavaScript. Its purpose is to assign the value on its right-hand side to the variable specified on its left-hand side. For instance, `let score = 100;` uses the `=` operator to store the value `100` into the variable `score`.

Online Coding Lessons Practice Test

Online Coding Lessons Practice Test

JavaScript Coding for Kids