JavaScript MCQ Questions with answers and solutions Page 50

Q. The syntax for adding a property to an object is?

(A) objectName.objectProperty == propertyValue;
(B) objectName.objectProperty = propertyValue;
(C) objectProperty = propertyValue;
(D) objectProperty == propertyValue;

💬 Discuss

✅ Correct Answer: (B) objectName.objectProperty = propertyValue;

Published by Ram Sharma ⭐ 193.88K Points at 13-Jul-2022 12:37 am in JavaScript

Q. The capability to store one object inside another object known as?

(A) Polymorphism
(B) Inheritance
(C) Aggregation
(D) Encapsulation

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✅ Correct Answer: (C) Aggregation

Published by Ram Sharma ⭐ 193.88K Points at 13-Jul-2022 12:38 am in JavaScript

Q. A programming language can be called object-oriented if it provides ________ basic capabilities to developers

(A) 1
(B) 2
(C) 3
(D) 4

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✅ Correct Answer: (D) 4

Published by Ram Sharma ⭐ 193.88K Points at 13-Jul-2022 12:38 am in JavaScript

Q. what will be the output of below code?

Code:

const event = new Date(Date.UTC(2012, 11, 20, 3, 0, 0));
console.log (event.toLocaleString('en-IN', { timeZone: 'UTC' }));

(A) 2012/12/20, 3:00:00 am
(B) 20/12/2012, 3:00:00 am
(C) 12/20/2012, 3:00:00
(D) 20/12/2012, 3:00:00

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✅ Correct Answer: (B) 20/12/2012, 3:00:00 am

Published by Ram Sharma ⭐ 193.88K Points at 13-Jul-2022 12:39 am in JavaScript

Q. If para1 is the DOM object for a paragraph, what is the correct syntax to change the text within the paragraph?

(A) "New Text"?
(B) para1.value="New Text";
(C) para1.firstChild.nodeValue= "New Text";
(D) para1.nodeValue="New Text";

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✅ Correct Answer: (B) para1.value="New Text";

Published by Ram Sharma ⭐ 193.88K Points at 13-Jul-2022 12:39 am in JavaScript

Q. Object ......... is the process of converting an objects state to a string from which it can later be restored.

(A) extensible
(B) serialization
(C) class
(D) prototype

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✅ Correct Answer: (B) serialization

Published by Ram Sharma ⭐ 193.88K Points at 13-Jul-2022 12:40 am in JavaScript

Q. ________________serializes only the enumerable own properties of an object.

(A) JSON.Objectify()
(B) JSON.Null()
(C) JSON.Stringify()
(D) JSON.Parse()

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✅ Correct Answer: (C) JSON.Stringify()

Published by Ram Sharma ⭐ 193.88K Points at 13-Jul-2022 12:41 am in JavaScript

Q. Microsoft has developed a popular HTML editor called?

(A) Dreamweaver
(B) FrontPage
(C) HomeSite
(D) Macromedia

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✅ Correct Answer: (B) FrontPage

Published by Ram Sharma ⭐ 193.88K Points at 13-Jul-2022 12:42 am in JavaScript

Q. Which of the following true about Javascript?

(A) Client-side JavaScript does not allow the reading or writing of files
(B) JavaScript cannot be used for networking applications
(C) JavaScript doesn't have any multi-threading or multiprocessor capabilities
(D) All of the above

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✅ Correct Answer: (D) All of the above

Published by Ram Sharma ⭐ 193.88K Points at 13-Jul-2022 12:43 am in JavaScript

Q. which of the following are advantages of JavaScript?

(A) Less server interaction
(B) Increased interactivity
(C) Richer interfaces
(D) All of the above

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✅ Correct Answer: (D) All of the above

Published by Ram Sharma ⭐ 193.88K Points at 13-Jul-2022 12:43 am in JavaScript

JavaScript MCQs with answers Page - 50

Q. The syntax for adding a property to an object is?

Q. The capability to store one object inside another object known as?

Q. A programming language can be called object-oriented if it provides ________ basic capabilities to developers

Q. what will be the output of below code?

Q. If para1 is the DOM object for a paragraph, what is the correct syntax to change the text within the paragraph?

Q. Object ......... is the process of converting an objects state to a string from which it can later be restored.

Q. ________________serializes only the enumerable own properties of an object.

Q. Microsoft has developed a popular HTML editor called?

Q. Which of the following true about Javascript?

Q. which of the following are advantages of JavaScript?

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