JavaScript MCQ Questions with answers and solutions Page 51

Q. Choose the correct JavaScript syntax to change the content of the following HTML code.

(A) document.getElementById ("letsfindcourse").innerHTML = I am a letsfindcourse;
(B) document.getId ("letsfindcourse") = "I am a letsfindcourse";
(C) document.getElementById ("letsfindcourse").innerHTML = "I am a letsfindcourse";
(D) document.getElement ("letsfindcourse").innerHTML = "I am a letsfindcourse";

💬 Discuss

✅ Correct Answer: (C) document.getElementById ("letsfindcourse").innerHTML = "I am a letsfindcourse";

Published by Ram Sharma ⭐ 193.88K Points at 13-Jul-2022 12:44 am in JavaScript

Q. Which of the following is correct about features of JavaScript?

(A) It can not Handling dates and time
(B) JavaScript is a object-based scripting language.
(C) JavaScript is not interpreter based scripting language.
(D) All of the above

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✅ Correct Answer: (B) JavaScript is a object-based scripting language.

Published by Ram Sharma ⭐ 193.88K Points at 13-Jul-2022 12:44 am in JavaScript

Q. Inside which HTML element do we put the JavaScript?

(A) <style>
(B) <meta>
(C) <head>
(D) <script>

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✅ Correct Answer: (D) <script>

Published by Ram Sharma ⭐ 193.88K Points at 13-Jul-2022 12:45 am in JavaScript

Q. what will be the output of below JavaScript code?

Code:

var val = "JavaScript String"
splittedVal = val.split('a',2)
console.log(splittedVal);

(A) [ 'J', 'v' ]
(B) [ 'J' ,'v','Script']
(C) [ 'J', 'v', 'Script String' ]
(D) [ 'JavaScript String' ]

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✅ Correct Answer: (A) [ 'J', 'v' ]

Published by Ram Sharma ⭐ 193.88K Points at 13-Jul-2022 12:46 am in JavaScript

Q. What will be printed in the console on execution of the below JavaScript code?

Code:

var materials = [
'Table',
'Chair',
'Boxes',
'Press'
];

console.log(materials.map (material => material.length));

(A) [5,5,5,5]
(B) [5]{4}
(C) [5]
(D) Both A and B

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✅ Correct Answer: (A) [5,5,5,5]

Published by Ram Sharma ⭐ 193.88K Points at 13-Jul-2022 12:47 am in JavaScript

Q. What will be printed in the console on execution of the following JS code:

Code:

var array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
var myArr= array.filter(v => v % 3 === 0);

console.log(myArr);

(A) myArr
(B) [3, 6, 9, 12, 15]
(C) [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
(D) [1, 2, 4, 5, 7, 8, 10, 11, 13, 14]

💬 Discuss

✅ Correct Answer: (B) [3, 6, 9, 12, 15]

Published by Ram Sharma ⭐ 193.88K Points at 13-Jul-2022 12:47 am in JavaScript

Q. What will be printed in the console on execution of the following JS code:

Code:

var array = [2, 4, 6, 7, 8, 10];
var myArr= array.filter(v => v / 2 === 0);

console.log(myArr);

(A) [7]
(B) [2, 4, 6, 8, 10]
(C) [2, 4, 6, 7, 8, 10]
(D) myArr

💬 Discuss

✅ Correct Answer: (B) [2, 4, 6, 8, 10]

Published by Ram Sharma ⭐ 193.88K Points at 13-Jul-2022 12:48 am in JavaScript

Q. What keyword is used to check whether a given property is valid or not?

(A) in
(B) is in
(C) exists
(D) lies

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✅ Correct Answer: (A) in

Published by Admin ⭐ 38.37K Points at 16-Jul-2022 04:48 pm in JavaScript

Q. How can a datatype be declared to be a constant type?

(A) const
(B) var
(C) let
(D) constant

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✅ Correct Answer: (A) const

Published by Admin ⭐ 38.37K Points at 16-Jul-2022 04:49 pm in JavaScript

Q. What will be the output of the following code snippet?

Code:

<script type="text/javascript">
a = 5 + "9";
document.write(a);
</script>

(A) Compilation Error
(B) 14
(C) Runtime Error
(D) 59

💬 Discuss

✅ Correct Answer: (D) 59

Published by Admin ⭐ 38.37K Points at 16-Jul-2022 04:50 pm in JavaScript

JavaScript MCQs with answers Page - 51

Q. Choose the correct JavaScript syntax to change the content of the following HTML code.

Q. Which of the following is correct about features of JavaScript?

Q. Inside which HTML element do we put the JavaScript?

Q. what will be the output of below JavaScript code?

Q. What will be printed in the console on execution of the below JavaScript code?

Q. What will be printed in the console on execution of the following JS code:

Q. What will be printed in the console on execution of the following JS code:

Q. What keyword is used to check whether a given property is valid or not?

Q. How can a datatype be declared to be a constant type?

Q. What will be the output of the following code snippet?

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