JavaScript Interview Questions Quiz Part 5

What will be the output of the following code?

console.log(typeof undefined == typeof null);

What will be the output of this code?

let x = [1, 2, 3];
console.log(x[3]);

What is the output of this code snippet?

console.log(true + false);

What will be the output of this code?

console.log(1 + "2" + 3);

What will be the output of the following code?

console.log([] + []);

What will be the output of this code?

console.log('5' - 3);

What is the output of this code snippet?

let x = 10;
console.log(x++ * 2);

What will be the output of the following code?

let arr = [1, 2, 3];
let result = arr.map(num => num * 2);
console.log(result);

What will be the output of this code?

let a = [1, 2, 3];
let b = a;
b.push(4);
console.log(a);

What will be the output of the following code?

console.log(typeof NaN);