Quiz

Back to course home

0% completed

Vote For New Content

Quiz

Table of Contents

Contents are not accessible

What is the output of the following code snippet using a for loop?

for(let i = 0; i < 3; i++) {
    console.log(i);
}

A

0 1 2

B

1 2 3

C

0 1 2 3

D

undefined

How many times does the following while loop run?

let i = 5;
while(i > 0) {
    i--;
}
console.log(i);

A

4

B

5

C

6

D

0

What does the following do-while loop output?

let i = 3;
do {
    console.log(i);
    i++;
} while(i < 3);

A

Prints 3 only

B

Prints 3 and then 4

C

No output

D

undefined

What will be the output of the following for-in loop?

const obj = {a: 1, b: 2, c: 3};
for (let prop in obj) {
    console.log(prop);
}

A

1 2 3

B

"a" "b" "c"

C

undefined

D

"a: 1", "b: 2", "c: 3"

Given an array arr = [10, 20, 30, 40, 50];, which loop correctly logs each element?

Choose all correct options

for(let i = 0; i <= arr.length; i++) { console.log(arr[i]); }

for(let i = 0; i < arr.length; i++) { console.log(arr[i]); }

arr.forEach(i => console.log(i));

Both B and C are correct.

What is the final value of x after this do-while loop executes?

let x = 0;
do {
    x++;
} while(x < 5);
console.log(x);

A

4

B

5

C

6

D

undefined

Which method is used to iterate over array arr = ['a', 'b', 'c'] and execute a function for each element?

Choose all correct options

arr.loop(function(element) { ... });

arr.forEach(function(element) { ... });

for(let element of arr) { ... }

Both B and C are correct.

.....

Like the course? Get enrolled and start learning!

Table of Contents

Contents are not accessible