Explore topic-wise MCQs in Technical MCQs.

This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Technical MCQs knowledge and support exam preparation. Choose a topic below to get started.

1.

Which is an equivalent code to invoke a function m of class o that expects two arguments x and y?

A. o(x,y);
B. o.m(x) && o.m(y);
C. m(x,y);
D. o.m(x,y);
E.
Answer» E.
Discussion
2.

const pt1 = {};
const ob1 = Object.create(pt1);
console.log( Object.getPrototypeOf(ob1) === pt1 );
9.A linkage of series of prototype objects is called as :

A. prototype stack
B. prototype chain
C. prototype class
D. prototypes
Answer» C. prototype class
Discussion
3.

const ob1 = { a: 5, b: 10, c: 15 }; const ob2 = Object.assign({c: 8, d: 3}, ob1); console.log(ob2.c, ob2.d);8.What will be the output of the following JavaScript code?

A. true
B. false
C. errot
D. 0
Answer» B. false
Discussion
4.

var obj = new Fun();obj.constructor === Fun6.If X is the superclass and Y is the subclass, then subclass inheriting the superclass can be represented as _________

A. Y=inherit(X);
B. Y=X.inherit();
C. Y.prototype=inherit(X);
D. Y.prototype=inherit(X.prototype);
Answer» D. Y.prototype=inherit(X.prototype);
Discussion
5.

var json= '{ "sId":2001,"sName":"John" }';
//line 2
console.log(student.sId+" "+student.sName);
5.What will be the output of the following JavaScript code?

A. true
B. false
C. 0
D. 1
Answer» C. 0
Discussion
6.

function Ticket(from,to,pName){
this.from=from;
this.to=to;
this.pName= pName;
}

var ticket=new Ticket( "Udaipur","Pune","Raj" );
4.Consider the below code:Choose the appropriate statement to be inserted at line 2, in order to create a JavaScript object named student?

A. var student=json.parse(json);
B. var student=JSON.stringify(json);
C. var student=JSON.parse(json);
D. var student=json.stringify(json);
Answer» D. var student=json.stringify(json);
Discussion
7.

function Ticket(from,to,pName){
this.from=from;
this.to=to;
this.pName= pName;
}

var ticket=new Ticket( "Udaipur","Pune","Raj" );
3.Identify the correct syntax to create a JavaScript object for Employee with property empid, empName?

A. var employee=new Object(); employee.empid=20; employee.empName="John";
B. var employee ={id:2001,empName:"John"};
C. var employee=Employee(); employee.empid=20; employee.empName="John";
D. Both A and C
Answer» B. var employee ={id:2001,empName:"John"};
Discussion
8.

class Rect {
constructor(h, w) {
this.height = h;
this.width = w;
}
get foo() {
return this.foo();
}
foo() {
return this.height * this.width;
}
}

const sq = new Rect(5, 20);
console.log(sq.foo());
2.Choose the correct syntax in order to access property of the object created?

A. ticket.from & ticket[to]
B. ticket[to] & ticket[from]
C. ticket {to} & ticket.to
D. ticket[to] & ticket{from}
Answer» B. ticket[to] & ticket[from]
Discussion