Which of the following is the correct code for invoking a function without this

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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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2) Consider the following code snippet

function f() {};

The above prototype represents a

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 ?

4) Consider the following code snippet :

 var c = counter(), d = counter();
c.count()
d.count()
c.reset()
c.count()
d.count()

The state stored in d is :

5) What is the difference between the two lines given below ?

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

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