Explore topic-wise MCQs in Technical MCQs.

This section includes 15 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.

The Function() constructor expects ______ number of string arguments

A. 0
B. 1
C. 2
D. any
E.
Answer» E.
Discussion
2.

Does JavaScript allows us to write our own functions as well?

A. Yes
B. No
C. Can be yes or no
D. Can not say
Answer» B. No
Discussion
3.

Which statement required if you want to return a value from a function?

A. continue
B. break
C. loop
D. return
Answer» E.
Discussion
4.

The most common way to define a function in JavaScript is by using the ____________ keyword.

A. fun
B. var
C. function
D. define
Answer» D. define
Discussion
5.

Code A:
var x = 10;
y = --x + 1;
alert(y);

Code B:
var x = 10;
y = x-- + 1;
alert(y);
11.A _________ is a group of reusable code which can be called anywhere in your program.

A. exception
B. function
C. loop
D. switch
Answer» C. loop
Discussion
6.

function message() {
var name = "Bench";
alert(name);
}10.What is the output for code A and B?

A. 10,10
B. 10,11
C. 11,10
D. 11,11
Answer» C. 11,10
Discussion
7.

Variable declared is example of ___________ Variable.

A. Local
B. Global
C. Semi-Global
D. None of the above
Answer» B. Global
Discussion
8.

When you invoke the........ method on a function f and pass an object o, the method returns a new function.

A. apply()
B. call()
C. bind()
D. string()
Answer» D. string()
Discussion
9.

........ functions need not allow invocations with zero arguments.

A. zero
B. strict
C. empty
D. varargs
Answer» E.
Discussion
10.

num1=5;
function cal() {
num1=10;
num2=5;
num3=num2*num1;
console.log(num3);
}
cal();
6.Functions are invoked as functions or as methods with an __________.

A. invocation statement
B. invocation expression
C. invocation function
D. invocation method
Answer» C. invocation function
Discussion
11.

let chaval= (p)=>p+2;
console.log(chaval(2));5.what will be the output of the below code?

A. 25
B. 50
C. 100
D. Error cannot have more than one variable with same name
Answer» C. 100
Discussion
12.

function password(pass) {
for (i = 0; i < pass.length; i++) {
}
}

function name(pname) {
console.log("The value of i is "+i);
for (i = 0; i < pname.length; i++) {
}
}

password("54321");
name("John");
4.What will be the output of the below code?

A. 4
B. 22
C. Error: changeVal is not a function
D. undefined
Answer» B. 22
Discussion
13.

thisfun=function lfc(x){
console.log(x*x);
}
// line 4
3.What will be the output of the below code?

A. 0
B. 5
C. undefined
D. error
Answer» C. undefined
Discussion
14.

function lfc(myname){
console.log(10+"lfc" +12);
}
res=lfc(10);
console.log(res); //line 5
2.Consider the JavaScript code:Choose the correct code to be inserted at line 4 in order to invoke the function.

A. thisfun(10)
B. lfc(10)
C. function thisfun(10)
D. None of the above
Answer» B. lfc(10)
Discussion
15.

Consider the JavaScript code:Identify the value that will be displayed in alert box at line 5?

A. 10
B. 10lfc12
C. undefined
D. 10lfc
Answer» D. 10lfc
Discussion