JavaScript MCQ Questions with answers and solutions Page 11

Q. Every object contains three object attributes that are

(A) Prototype, class, object's extensible flag
(B) Prototype, class, objects' parameters
(C) Class, parameters, object's extensible flag
(D) Native object, Classes and Interfaces and Object's extensible flag

✅ Correct Answer: (A) Prototype, class, object's extensible flag

Published by Akshay Kulkarni ⭐ 3.46K Points at 09-Jun-2022 04:39 am in JavaScript

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

Code:

<script>  
  
var article = {  
              "main title": "How to learn JavaScript",   
              'sub-title': "The Definitive Guide",   
              "for": "all audiences",   
              author: {   
firstname: "Scott",   
                         surname: "McCall"   
                      }  
           }  
</script>

(A) Properties
(B) property names
(C) property values
(D) objects

💬 Discuss

✅ Correct Answer: (B) property names

Published by Akshay Kulkarni ⭐ 3.46K Points at 09-Jun-2022 04:39 am in JavaScript

Q. The linkage of a set of prototype objects is known as______

(A) prototype stack
(B) prototype
(C) prototype class
(D) prototype chain

💬 Discuss

✅ Correct Answer: (D) prototype chain

Published by Akshay Kulkarni ⭐ 3.46K Points at 09-Jun-2022 04:40 am in JavaScript

Q. In the following line of code, what we will call the "datatype" written in brackets?

Code:

article[datatype]=assignment_value;

(A) An String
(B) A integer
(C) An object
(D) Floating point

💬 Discuss

✅ Correct Answer: (A) An String

Published by Akshay Kulkarni ⭐ 3.46K Points at 09-Jun-2022 04:41 am in JavaScript

Q. To know about an object, whether the object is a prototype (or a part of a prototype chain) of another object, the user can use_______

(A) ==operator
(B) equals() method
(C) === operator
(D) isPrototypeOf() method

💬 Discuss

✅ Correct Answer: (D) isPrototypeOf() method

Published by Akshay Kulkarni ⭐ 3.46K Points at 09-Jun-2022 04:42 am in JavaScript

Q. In the following given line of code, the prototype representing the_____

Code:

functionx(){};

(A) Function x
(B) Prototype of a function
(C) A custom constructor
(D) Not valid

💬 Discuss

✅ Correct Answer: (B) Prototype of a function

Published by Akshay Kulkarni ⭐ 3.46K Points at 09-Jun-2022 04:42 am in JavaScript

Q. See the given code of JavaScript and choose the correct output from the following

Code:

var string1 = "40";  
varvalueinit=50;  
alert( string1 +intvalue);

(A) 4090
(B) 90
(C) 4050
(D) Exception

💬 Discuss

✅ Correct Answer: (C) 4050

Published by Akshay Kulkarni ⭐ 3.46K Points at 09-Jun-2022 04:44 am in JavaScript

Q. In JavaScript, what will be used for calling the function definition expression

(A) Function prototype
(B) Function literal
(C) Function calling
(D) Function declaration

💬 Discuss

✅ Correct Answer: (B) Function literal

Published by Akshay Kulkarni ⭐ 3.46K Points at 09-Jun-2022 04:44 am in JavaScript

Q. Which of the following one is the property of the primary expression

(A) Contains only keywords
(B) basic expressions containing all necessary functions
(C) contains variable references alone
(D) stand-alone expressions

💬 Discuss

✅ Correct Answer: (D) stand-alone expressions

Published by Akshay Kulkarni ⭐ 3.46K Points at 09-Jun-2022 04:45 am in JavaScript

Q. Consider the following snippet of JavaScript code:
Which one of the following statement is most suitable to check if the pattern matches with the sting "text".

Code:

var text ="testing: 1, 2, 3";// Sample text  
var pattern =/\d+/g// Matches all instances of one or more digits.

(A) test(text)
(B) equals(pattern)
(C) test(pattern)
(D) text==pattern

💬 Discuss

✅ Correct Answer: (D) text==pattern

Published by Akshay Kulkarni ⭐ 3.46K Points at 09-Jun-2022 04:46 am in JavaScript

JavaScript MCQs with answers Page - 11

Q. Every object contains three object attributes that are

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

Q. The linkage of a set of prototype objects is known as______

Q. In the following line of code, what we will call the "datatype" written in brackets?

Q. To know about an object, whether the object is a prototype (or a part of a prototype chain) of another object, the user can use_______

Q. In the following given line of code, the prototype representing the_____

Q. See the given code of JavaScript and choose the correct output from the following

Q. In JavaScript, what will be used for calling the function definition expression

Q. Which of the following one is the property of the primary expression

Q. Consider the following snippet of JavaScript code:
Which one of the following statement is most suitable to check if the pattern matches with the sting "text".

Programming Categories

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JavaScript MCQs with answers Page - 11

Q. Every object contains three object attributes that are

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

Q. The linkage of a set of prototype objects is known as______

Q. In the following line of code, what we will call the "datatype" written in brackets?

Q. To know about an object, whether the object is a prototype (or a part of a prototype chain) of another object, the user can use_______

Q. In the following given line of code, the prototype representing the_____

Q. See the given code of JavaScript and choose the correct output from the following

Q. In JavaScript, what will be used for calling the function definition expression

Q. Which of the following one is the property of the primary expression

Q. Consider the following snippet of JavaScript code: Which one of the following statement is most suitable to check if the pattern matches with the sting "text".

Programming Categories

📱 Download Our App

Q. Consider the following snippet of JavaScript code:
Which one of the following statement is most suitable to check if the pattern matches with the sting "text".