JAVASCRIPT.QUIZ

Where is the correct place to insert a JavaScript?

• Both the head section and the body section are correct

• The head section

• The body section

• None of the above

Which of the following is not a valid JavaScript variable name?

• 2java

• _java_and_java_names

• javaandjava

• None of the above

What is the correct syntax for referring to an external script called 'gfg.js'?

• «script name="gfg.js">

• «script href="gfg.js">

• <script src="gfg.js">

• None of these

What will be the output for the following lines of code:

function sayHi) {

console.10g (name) ; console.log (age);

var name = 'Lydia';

let age = 21;

｝

sayHi ();

• Lydia and undefined

• Lydia and ReferenceError

• ReferenceError and 21

• undefined and ReferenceError

What's the output ?

for (var i = 0; i < 3; i++)

setTimeout (() →> console.1

for (let i = 0; 1 < 3; i++)

setTimeout (() => console.1

}

• 012 and 0 1 2

• 012 and 3 3 3

• 3 3 3 and 0 1 2

• None of the above

What will be the output of the following code?

const firstName='Rishi'

lastName='Raj'

console.log(`hello ${firstName}, nice to meet you`);

• hello ${firstName}, nice to meet you

• hello Rishi, nice to meet you

• hello Raj, nice to meet you

• None of the above

Which of the following is true w.r.t. variables ?

• Variables declared with let and const can’t be hoisted

• Variables declared with var can be hoisted

• Both a and b

• None of the above

What will be the output of the following code?

< script>

let ans = 6 / "3";

document.write ( typeof ans );

< /script>

• 'number'

• 'integer'

• 'string'

• None of the above

What's the output ?

<script>

let y = 1;

y = typeof x;

document.write(typeof y);

</script>

• string

• null

• number

• boolean

What will be the output of the following code?

JavaScript

<script>

document.write(Number('1') - 1 == 0);

</script>

• true

• false

• 1

• None of the above