Java Script Basics

What keyword is used to declare a variable in JavaScript?

• var

• function

• let

• const

How do you call a function named 'myFunction' in JavaScript?

• myFunction();

• function.myFunction()

• myFunction{}

• callFunction(myFunction)

What is the correct way to write a JavaScript array?

• new Array()

• array()

• []

• {}

What is the result of 10 + '5' in JavaScript?

• 55

• 15

• 50

• 105

How do you round the number 7.25 to the nearest integer in JavaScript?

• 7

• 7.5

• 8

• 6

What is the correct way to write a JavaScript function?

• function functionName(parameter1, parameter2) { // function body }

• function functionName() { // function body }

• function functionName(parameter1 parameter2) { // function body }

• function functionName(parameter1, parameter2) { // function body }

How do you add a comment in a JavaScript code?

• Use // for single-line comments or /* */ for multi-line comments

• Use -- for single-line comments or /* */ for multi-line comments

• Use ## for single-line comments or /* */ for multi-line comments

• Use /* */ for single-line comments or // for multi-line comments

How do you find the number with the highest value in an array in JavaScript?

• Math.max(...array)

• Math.max(array)

• array.reduce((a, b) => Math.max(a, b))

• array.sort((a, b) => b - a)[0]

What is the correct way to sort an array in JavaScript?

• array.sorted()

• array.sort()

• array.orderBy()

• array.arrange()

How do you loop through elements of an array in JavaScript?

• { // Using a for loop for (let i = 0; i < array.length; i++) { console.log(array[i]); } // Using forEach method array.forEach(element => { console.log(element); } }

• Using a do-while loop

• Using a switch statement

• Using a while loop