JavaScript Numbers and Strings – MCQs

What is the output of the following code?

let x = 10;

let y = "5";

console.log(x + y);

Which of the following methods converts a number to a string?

What will be the output?

console.log(Number("123"));

What is the output of:

console.log(parseInt("12.34"));

Which method converts a number into an exponential notation?

What is the output of:

console.log(isNaN("Hello"));

What is the output of:

console.log((0.1 + 0.2).toFixed(2));

Which method returns NaN if the value cannot be converted into a number?

What is the result of:

console.log(Math.floor(4.7));

What does Math.random() return?