Q. When does the function name become optional in JavaScript?

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Q. What is the purpose of a return statement in a function?

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Q. What will happen if a return statement does not have an associated expression?

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Q. A function with no return value is called

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Q. Which of the following is the correct code for invoking a function without this keyword at all, and also too determine whether the strict mode is in effect?

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

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Q. Consider the following code snippet :

var grand_Total=eval("10*10+5");

The output for the above statement would be :

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Q. Do functions in JavaScript necessarily return a value ?

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Q. Consider the following code snippet :

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

Will the above code work ?

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Q. Consider the following code snippet :

var string2Num=parseInt("123xyz");

The result for the above code snippet would be :

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Q. If you have a function f and an object o, you can define a method named m of o with

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Q. For the below mentioned code snippet:

var o = new Object();

The equivalent statement is:

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Q. What is the difference between the two lines given below ?

!!(obj1 && obj2);
(obj1 && obj2);

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Q. What kind of scoping does JavaScript use?

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Q. What must be done in order to implement Lexical Scoping?

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Q. What is a closure?

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Q. Which of the following are examples of closures?

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Q. Which of the following uses a lot of CPU cycles?

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Q. What is the fundamental rule of lexical scoping?

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Q. What is the opposite approach to the lexical scoping?

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