Fundamentals of JavaScript
Authored by Deepthi Surendran
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the correct syntax to declare a variable in JavaScript?
let x = 5;
let x == 5;
var x = 5;
const x : 5;
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a JavaScript data type?
boolean
integer
string
undefined
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does 'NaN' stand for in JavaScript?
Number-Not-Available
Not-a-Name
Null-Value
Not-a-Number
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you create a function in JavaScript?
function:myFunction() { // function body }
function myFunction: { // function body }
function myFunction() { // function body } or const myFunction = () => { // function body }
myFunction() => { // function body }
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of the 'this' keyword in JavaScript?
The 'this' keyword is used to refer to the current execution context or object.
The 'this' keyword is used to create new objects in JavaScript.
The 'this' keyword is a function that returns the current date.
The 'this' keyword is used to declare variables in JavaScript.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can you add a comment in JavaScript?
Use // for single-line comments and /* comment */ for multi-line comments.
Use # for comments
Use for comments
Use // for multi-line comments only
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the difference between '==' and '===' in JavaScript?
The difference is that '==' performs type coercion while '===' does not.
Both '==' and '===' perform type coercion.
'==' checks for strict equality while '===' checks for loose equality.
'==' and '===' are interchangeable operators.
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