Quiz: Introduction to JS - 1

Question 1

Which of the following is true about JavaScript?

Accepted Answer

e. b. It can only be used for client-side scripting. c. It is a compiled language.

Answer

It is a server-side scripting language.

Answer

It can only be used for client-side scripting.

Answer

It is a compiled language.

Question 2

What is the purpose of JavaScript comments?

Accepted Answer

To make the code more readable and maintainable.

Answer

To disable certain parts of the code temporarily.

Answer

To specify the version of JavaScript use

Answer

e. b. To disable certain parts of the code temporarily. c. To specify the version of JavaScript use

Question 3

Which of the following is a valid JavaScript data type?

Accepted Answer

All of the above

Answer

Date

Answer

Array

Answer

String

Question 4

How do you output a message to the console in JavaScript?

Accepted Answer

console.log()

Answer

print()

Answer

log()

Answer

e.log() b. print() c. log()

Question 5

What is the output of the following JavaScript code?
var x = 10;
var y = "5";
console.log(x + y);

Accepted Answer

"105"

Answer

15

Answer

105

Answer

Error

Question 6

What is the output of the following JavaScript code?
var x = 5;
console.log(x++);

Accepted Answer

5

Answer

6

Answer

Error

Answer

Undefined

Question 7

What is the output of the following JavaScript code?
var x = 10;
var y = 5;
console.log(x += y);

Accepted Answer

15

Answer

10

Answer

5

Answer

Error

Question 8

What is the output of the following JavaScript code?
var x = "Hello";
console.log(x.length);

Accepted Answer

5

Answer

6

Answer

1

Answer

Error

Question 9

What is the output of the following JavaScript code?
var x = [1, 2, 3];
x.push(4);
console.log(x.length);

Accepted Answer

4

Answer

1

Answer

2

Answer

3

Question 10

What is the output of the following JavaScript code?
var x = 10;
if (x === "10") {
console.log("Equal");
} else {
console.log("Not equal");
}

Accepted Answer

Not equal

Answer

Equal

Answer

Error

Answer

Undefined

Question 11

What is the output of the following JavaScript code?

function multiply(a, b) {
return a * b;
}

var result = multiply(2, 3);
console.log(result);

Accepted Answer

6

Answer

2

Answer

3

Answer

Error

Question 12

What is the output of the following JavaScript code?

var x = 5;

function increment() {
var x = 10;
x++;
}

increment();
console.log(x);

Accepted Answer

5

Answer

10

Answer

11

Answer

Error

Question 13

What is the output of the following JavaScript code?

var x = 5;

function update() {
x = 10;
}

update();
console.log(x);

Accepted Answer

10

Answer

5

Answer

Error

Answer

Undefined

Question 14

What is the output of the following JavaScript code?

var x = 5;

function multiplyByTwo(x) {
return x * 2;
}

var result = multiplyByTwo(x);
console.log(result);

Accepted Answer

5

Answer

10

Answer

15

Answer

Error

Question 15

What is the output of the following JavaScript code?

function greet(name) {
console.log("Hello, " + name + "!");
}

greet("John", "Doe");

Accepted Answer

Hello, John!

Answer

Hello, Doe!

Answer

Hello, John Doe!

Answer

Error

Quiz: Introduction to JS - 1 - Free MCQ Test with solutions for Software

MCQ Practice Test & Solutions: Quiz: Introduction to JS - 1 (15 Questions)

Which of the following is true about JavaScript?

What is the purpose of JavaScript comments?

Which of the following is a valid JavaScript data type?

How do you output a message to the console in JavaScript?

What is the output of the following JavaScript code?
var x = 10;
var y = "5";
console.log(x + y);

What is the output of the following JavaScript code?
var x = 5;
console.log(x++);

What is the output of the following JavaScript code?
var x = 10;
var y = 5;
console.log(x += y);

What is the output of the following JavaScript code?
var x = "Hello";
console.log(x.length);

What is the output of the following JavaScript code?
var x = [1, 2, 3];
x.push(4);
console.log(x.length);

What is the output of the following JavaScript code?
var x = 10;
if (x === "10") {
console.log("Equal");
} else {
console.log("Not equal");
}

What is the output of the following JavaScript code?

function multiply(a, b) {
return a * b;
}
var result = multiply(2, 3);
console.log(result);

What is the output of the following JavaScript code?

var x = 5;
function increment() {
var x = 10;
x++;
}
increment();
console.log(x);

What is the output of the following JavaScript code?

var x = 5;
function update() {
x = 10;
}
update();
console.log(x);

What is the output of the following JavaScript code?

var x = 5;
function multiplyByTwo(x) {
return x * 2;
}
var result = multiplyByTwo(x);
console.log(result);

What is the output of the following JavaScript code?

function greet(name) {
console.log("Hello, " + name + "!");
}
greet("John", "Doe");

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Quiz: Introduction to JS - 1 - Free MCQ Test with solutions for Software

MCQ Practice Test & Solutions: Quiz: Introduction to JS - 1 (15 Questions)

Which of the following is true about JavaScript?

What is the purpose of JavaScript comments?

Which of the following is a valid JavaScript data type?

How do you output a message to the console in JavaScript?

What is the output of the following JavaScript code? var x = 10; var y = "5"; console.log(x + y);

What is the output of the following JavaScript code? var x = 5; console.log(x++);

What is the output of the following JavaScript code? var x = 10; var y = 5; console.log(x += y);

What is the output of the following JavaScript code? var x = "Hello"; console.log(x.length);

What is the output of the following JavaScript code? var x = [1, 2, 3]; x.push(4); console.log(x.length);

What is the output of the following JavaScript code? var x = 10; if (x === "10") { console.log("Equal"); } else { console.log("Not equal"); }

What is the output of the following JavaScript code? function multiply(a, b) { return a * b; }var result = multiply(2, 3); console.log(result);

What is the output of the following JavaScript code? var x = 5;function increment() { var x = 10; x++; }increment(); console.log(x);

What is the output of the following JavaScript code? var x = 5;function update() { x = 10; }update(); console.log(x);

What is the output of the following JavaScript code? var x = 5;function multiplyByTwo(x) { return x * 2; }var result = multiplyByTwo(x); console.log(result);

What is the output of the following JavaScript code? function greet(name) { console.log("Hello, " + name + "!"); }greet("John", "Doe");

JavaScript for Web Development

JavaScript for Web Development

Top Courses for Software Development

About this Software Development Practice Test

Explore more Software Development Study Resources

What is the output of the following JavaScript code?
var x = 10;
var y = "5";
console.log(x + y);

What is the output of the following JavaScript code?
var x = 5;
console.log(x++);

What is the output of the following JavaScript code?
var x = 10;
var y = 5;
console.log(x += y);

What is the output of the following JavaScript code?
var x = "Hello";
console.log(x.length);

What is the output of the following JavaScript code?
var x = [1, 2, 3];
x.push(4);
console.log(x.length);

What is the output of the following JavaScript code?
var x = 10;
if (x === "10") {
console.log("Equal");
} else {
console.log("Not equal");
}

What is the output of the following JavaScript code?

function multiply(a, b) {
return a * b;
}
var result = multiply(2, 3);
console.log(result);

What is the output of the following JavaScript code?

var x = 5;
function increment() {
var x = 10;
x++;
}
increment();
console.log(x);

What is the output of the following JavaScript code?

var x = 5;
function update() {
x = 10;
}
update();
console.log(x);

What is the output of the following JavaScript code?

var x = 5;
function multiplyByTwo(x) {
return x * 2;
}
var result = multiplyByTwo(x);
console.log(result);

What is the output of the following JavaScript code?

function greet(name) {
console.log("Hello, " + name + "!");
}
greet("John", "Doe");