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Classes and Modules MCQ Questions and Answers

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Javascript Classes and Modules MCQ Questions and Answers : We provide quiz questions on Javascript Classes and Modules where you can learn lots of objective questions with answers and you can also download pdf of javascript.

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1) The behaviour of the instances present of a class inside a method is defined by

    Method
    Classes
    Interfaces
    Classes and Interfaces

Answer : B Discuss

2) The keyword or the property that you use to refer to an object through which they were invoked is

    from
    to
    this
    object

Answer : C Discuss

3) Consider the following code snippet :

 var o = new F();
 o.constructor === F

The output would be :

    false
    true
    0
    1

Answer : B Discuss

4) The basic difference between JavaScript and Java is

    There is no difference
    Functions are considered as fields
    Variables are specific
    Functions are values, and there is no hard distinction between methods and fields

Answer : D Discuss

5) The meaning for Augmenting classes is that

    objects inherit prototype properties even in dynamic state
    objects inherit prototype properties only in dynamic state
    objects inherit prototype properties in static state
    None of the mentioned

Answer : A Discuss

6) The property of JSON() method is:

    it can be invoked manually as object.JSON()
    it will be automatically invoked by the compiler
    it is invoked automatically by the JSON.stringify() method
    it cannot be invoked in any form

Answer : C Discuss

7) When a class B can extend another class A, we say that

    A is the superclass and B is the subclass
    B is the superclass and A is the subclass
    Both A and B are the superclass
    Both A and B are the subclass

Answer : A Discuss

8) If A is the superclass and B is the subclass, then subclass inherting the superclass can be represented as

    B=inherit(A);
    B=A.inherit();
    B.prototype=inherit(A);
    B.prototype=inherit(A.prototype);

Answer : C Discuss

9) The snippet that filters the filtered set is

    var t=new FilteredSet(s, {function(s) {return !(x instanceof Set);});
    var t=new FilteredSet{function(s) {return !(x instanceof Set);});
    var t=new FilteredSet(s, {function(s) {return (x instanceof Set);});
    var t=new FilteredSet(s, {function(s) {return x;});

Answer : A Discuss

10) The method that can be used to create new properties and also to modify the attributes of existing properties is

    Object.defineProperty()
    Object.defineProperties()
    Both Object.defineProperty() and Object.defineProperties()
    None of the mentioned

Answer : C Discuss

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