What is the difference between the two lines given below ?<br/><pre> !!(obj1 && obj2); (obj1 && obj2);</pre>

What is the difference between the two lines given below ?

  !!(obj1 &&

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What is the difference between the two lines given below ?

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

Both the lines result in a boolean value “True”

Both the lines result in a boolean value “False”

Both the lines checks just for the existence of the object alone

The first line results in a real boolean value whereas the second line merely checks for the existence of the objects

Answer : D

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1) Consider the following code snippet

o.m(x,y);

Which is an equivalent code for the above code snippet?

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2) Consider the following code snippet :

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

The output for the above statement would be :

10*10+5

105 as a string

105 as an integer value

Exception is thrown

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3) Do functions in JavaScript necessarily return a value ?

It is mandatory

Not necessary

Few functions return values by default

All of the mentioned

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4) For the below mentioned code snippet:

var o = new Object();

The equivalent statement is:

var o = Object();

var o;

var o= new Object;

Object o=new Object();

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5) Consider the following code snippet

function hypotenuse(a, b)
  {
        function square(x)
         {
              return x*x;
         }
        return Math.sqrt(square(a) + square(b));
 }

What does the above code result?

Sum of square of a and b

Square of sum of a and b

Sum of a and b square

None of the mentioned

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What is the difference between the two lines given below ?
!!(obj1 &&

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