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) The function definitions in JavaScript begins with

2) Consider the following code snippet :

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

Will the above code work ?

Yes, perfectly

Error

Exception will be thrown

Memory leak

View Answer

3) Consider the following code snippet

function printprops(o)
  {
     for(var p in o)
       console.log(p + ": " + o[p] + "\n");
 }

What will the above code snippet result ?

Prints the contents of each property of o

Returns undefined

All of the mentioned

None of the mentioned

View Answer

4) Consider the following code snippet

o.m(x,y);

Which is an equivalent code for the above code snippet?

o.m(x) && o.m(y);

o["m"](x,y);

o(m)["x","y"];

o.m(x && y);

View Answer

5) What is the purpose of a return statement in a function?

Returns the value and continues executing rest of the statements, if any

Returns the value and stops the program

Returns the value and stops executing the function

Stops executing the function and returns the value

View Answer

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