Which of the following is true about JavaScript functions?

Functions can be assigned to variables.

Functions cannot return values.

Functions do not accept parameters.

Which of the following statements is true about a while loop?

It runs as long as the condition is true.

It runs a fixed number of times.

It cannot be nested inside another loop.

What does the isNaN function check for in JavaScript?

Whether a value is not a number

Whether a variable is undefined

What is the difference between let and var in JavaScript?

let is block scoped, while var is function scoped.

let variables cannot be reassigned, but var can.

let is globally scoped, while var is block scoped.

What is the purpose of the return statement in a function?

To pass a value back to the caller of the function

To skip to the next iteration in a loop

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MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which of the following is used to store multiple values in a single variable?

Variable

Array

Function

Object

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which of the following loops is guaranteed to execute at least once?

for loop

while lop

do while loop

nested loop

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What is the result of 5 % 2 in most programming languages?

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What is the keyword used to declare a constant in JavaScript?

Variable

let

const

final

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which of the following is a valid function declaration in JavaScript?

def myFunction()

create function myFunction()

function myFunction()

myFunction = function()

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which operator is used for logical AND in JavaScript?

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

How do you access the third element of an array named arr?

arr.3

arr[2]

arr(4)

arr(3)

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Pre assessment frontend

Which of the following is used to store multiple values in a single variable?

Which of the following loops is guaranteed to execute at least once?

What is the result of 5 % 2 in most programming languages?

What is the keyword used to declare a constant in JavaScript?

Which of the following is a valid function declaration in JavaScript?

Which operator is used for logical AND in JavaScript?

How do you access the third element of an array named arr?

Which keyword is used to exit a loop prematurely?

Which of the following data types is NOT primitive in JavaScript?

What is the default value of an uninitialized variable in JavaScript?

Access all questions and much more by creating a free account

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