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Welcome to the Arrays and Functions MCQs Page

Dive deep into the fascinating world of Arrays and Functions with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Arrays and Functions, a crucial aspect of JavaScript. In this section, you will encounter a diverse range of MCQs that cover various aspects of Arrays and Functions, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within JavaScript.

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Check out the MCQs below to embark on an enriching journey through Arrays and Functions. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of JavaScript.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Arrays and Functions. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Arrays and Functions MCQs | Page 3 of 4

Q21.
Do functions in JavaScript necessarily return a value ?
Discuss
Answer: (c).Few functions return values by default
Q22.
Consider the following code snippet :

var tensquared = (function(x) {return x*x;}(10));

Will the above code work ?
Discuss
Answer: (a).Yes, perfectly
Q23.
Consider the following code snippet :

var string2Num=parseInt("123xyz");

The result for the above code snippet would be :
Discuss
Answer: (b).123xyz
Q24.
If you have a function f and an object o, you can define a method named m of o with
Discuss
Answer: (a).o.m=m.f;
Q25.
For the below mentioned code snippet:

var o = new Object();

The equivalent statement is:
Discuss
Answer: (c).var o= new Object;
Discuss
Answer: (d).The first line results in a real boolean value whereas the second line merely checks for the existence of the objects
Q27.
Consider the following code snippet. The state stored in d is :
var c = counter(), d = counter(); 
c.count()
d.count() 
c.reset() 
c.count() 
d.count()
Discuss
Answer: (a).1
Q28.
Consider the following code snippet. What does the last statement return ?
var c = counter(), d = counter(); 
function constfuncs() 
{
    var funcs = [];
    for(var i = 0; i < 10; i++)
        funcs[i] = function() { return i; };
    return funcs;
}
var funcs = constfuncs();
funcs[5]()
Discuss
Answer: (c).10
Q29.
What kind of scoping does JavaScript use?
Discuss
Answer: (b).Lexical
Discuss
Answer: (c).Reference the current scope chain
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