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JavaScript code quiz questions and answers

What will Happen when the following Code is executed?

var x = 5;

console.log(x);

if (true) {

    var x = 6;

    console.log(x);

}

console.log(x);
//The Output will be -

5

6

6


var x = 5;

console.log(x);

if (false) {

    var x = 6;

    console.log(x);

}

console.log(x);
//The Output will be -

5

5


What will happen when the following code is executed?

var x = 5;

function a() {

    var x = 6;

    return x;

}

console.log(x);

console.log(a());
//The Output will be -

5

6


What will happen when the following code is executed?

var x = 5;

function a() {

    x = 6;

    return x;

}

console.log(x);

console.log(a());
//The Output will be -

5

6


What will happen when the following code is executed?

var x = 5;

function a() {

    let x = 6;

    return x;

}

console.log(x);

console.log(a());
//The Output will be -

5

6

What will happen when the following code is executed?

let x = 5;

function a() {

    let x = 6;

    return x;

}

console.log(x);

console.log(a());
//The Output will be -

Uncaught SyntaxError: Identifier 'x' has already been declared

at: 1: 1


What will happen when the following code is executed?

const x = 5;

function a() {

    let x = 6;

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JavaScript code quiz questions and answers

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