JavaScript MCQ Questions with answers and solutions Page 20

Q. What was the original name of JavaScript when it discovered?

(A) LiveScript
(B) EScript
(C) JScript
(D) Mocha

💬 Discuss

✅ Correct Answer: (D) Mocha

Published by Mr. Dubey ⭐ 111.42K Points at 12-Jun-2022 08:18 am in JavaScript

Q. Which of the following is the correct way to write a comment in JavaScript code?

(A) //This is a comment
(B) /*This is a comment*/
(C) $This is a comment$
(D) **This is a comment**

💬 Discuss

✅ Correct Answer: (A) //This is a comment

Published by Mr. Dubey ⭐ 111.42K Points at 12-Jun-2022 08:19 am in JavaScript

Q. What would be the output of the following Javascript code?

Code:

var string1 = "Fee";  
var intvalue = 10000;  
alert( string1 + intvalue );

(A) Fee 10000
(B) 10000
(C) Fee10000
(D) Exception

💬 Discuss

✅ Correct Answer: (C) Fee10000

Published by Mr. Dubey ⭐ 111.42K Points at 12-Jun-2022 08:19 am in JavaScript

Q. Which of the following JavaScript operator is used to assign a value to a variable based on some condition?

(A) Assignment operator
(B) Bitwise Operator
(C) Conditional operator
(D) Logical Operator

💬 Discuss

✅ Correct Answer: (C) Conditional operator

Published by Mr. Dubey ⭐ 111.42K Points at 12-Jun-2022 08:20 am in JavaScript

Q. Which of the following variables are used in JavaScript programs?

(A) Varying randomly
(B) Causing high-school algebra flashbacks
(C) Storing numbers, dates, or other values
(D) None of the above

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✅ Correct Answer: (C) Storing numbers, dates, or other values

Published by Mr. Dubey ⭐ 111.42K Points at 12-Jun-2022 08:20 am in JavaScript

Q. What are the three crucial manipulations done in a "for loop" on a loop variable in JavaScript?

(A) The initialization, the Increment, and update
(B) The initialization, the test, and the update
(C) The initialization, the test, and Increment
(D) All of the above

💬 Discuss

✅ Correct Answer: (B) The initialization, the test, and the update

Published by Mr. Dubey ⭐ 111.42K Points at 12-Jun-2022 08:21 am in JavaScript

Q. Which of the following is the correct syntax to create a cookie using JavaScript?

(A) cookie = 'key1 = value1; key2 = value2; expires = date';
(B) cookie = 'key1 = value1; key2 = value2; expires = date';
(C) cookie = 'key1 = value1; key2 = value2; expires = date';
(D) cookie = 'key1 = value1; key2 = value2; expires = date';

💬 Discuss

✅ Correct Answer: (A) cookie = 'key1 = value1; key2 = value2; expires = date';

Published by Mr. Dubey ⭐ 111.42K Points at 12-Jun-2022 08:21 am in JavaScript

Q. What are the different alternatives of == and != in JavaScript?

(A) It uses bitwise checking
(B) It uses === and !== instead
(C) It uses equals() and notequals() instead
(D) It uses equalto()

💬 Discuss

✅ Correct Answer: (B) It uses === and !== instead

Published by Mr. Dubey ⭐ 111.42K Points at 12-Jun-2022 08:22 am in JavaScript

Q. What are the different types of Pop up boxes available in JavaScript?

(A) Alert
(B) Prompt
(C) Confirm
(D) All of the above

💬 Discuss

✅ Correct Answer: (D) All of the above

Explanation:

Let's solve it clearly:

In JavaScript, there are three types of popup boxes:

Alert — shows a simple message with an OK button.
Prompt — asks the user for input (shows an input box).
Confirm — asks the user to confirm something (OK/Cancel buttons).

Thus, the correct answer is:

(D) All of the above

Published by Mr. Dubey ⭐ 111.42K Points at 12-Jun-2022 08:22 am in JavaScript

Q. Which of the following is a server-side JavaScript object?

(A) Date
(B) FileUpload
(C) File
(D) Function

💬 Discuss

✅ Correct Answer: (C) File

Published by Mr. Dubey ⭐ 111.42K Points at 12-Jun-2022 08:22 am in JavaScript

JavaScript MCQs with answers Page - 20

Q. What was the original name of JavaScript when it discovered?

Q. Which of the following is the correct way to write a comment in JavaScript code?

Q. What would be the output of the following Javascript code?

Q. Which of the following JavaScript operator is used to assign a value to a variable based on some condition?

Q. Which of the following variables are used in JavaScript programs?

Q. What are the three crucial manipulations done in a "for loop" on a loop variable in JavaScript?

Q. Which of the following is the correct syntax to create a cookie using JavaScript?

Q. What are the different alternatives of == and != in JavaScript?

Q. What are the different types of Pop up boxes available in JavaScript?

Q. Which of the following is a server-side JavaScript object?

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