Explore topic-wise MCQs in JavaScript Questions & Answers Classes in JavaScript.

This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your JavaScript Questions & Answers Classes in JavaScript knowledge and support exam preparation. Choose a topic below to get started.

1.

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

A. Object.defineProperty()
B. Object.defineProperties()
C. Both Object.defineProperty() and Object.defineProperties()
D. Object.inherit()
Answer» D. Object.inherit()
Discussion
2.

The snippet that filters the filtered set is __________

A. var t=new FilteredSet(s, {function(s) {return !(x instanceof Set);});
B. var t=new FilteredSet{function(s) {return !(x instanceof Set);});
C. var t=new FilteredSet(s, {function(s) {return (x instanceof Set);});
D. var t=new FilteredSet(s, {function(s) {return x;});
Answer» B. var t=new FilteredSet{function(s) {return !(x instanceof Set);});
Discussion
3.

The property of JSON() method is __________

A. it can be invoked manually as object.JSON()
B. it will be automatically invoked by the compiler
C. it is invoked automatically by the JSON.stringify() method
D. it cannot be invoked in any form
Answer» D. it cannot be invoked in any form
Discussion
4.

The meaning for Augmenting classes is that ___________

A. objects inherit prototype properties even in a dynamic state
B. objects inherit prototype properties only in a dynamic state
C. objects inherit prototype properties in the static state
D. object doesn t inherit prototype properties in the static state
Answer» B. objects inherit prototype properties only in a dynamic state
Discussion