Consider the following code snippet :<br/> <pre> var c = counter(), d = counter();<br/> c.count()<br/> d.count()<br/>

Consider the following code snippet :

 var c = counter(), d = counter(

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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 :

1

0

Null

Undefined

Answer : A

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1) 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

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2) 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);

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3) 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?

var strict = (function { return this; });

mode strict = (function() { return !this; }());

var strict = (function() { return !this; }());

mode strict = (function { });

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

o.m=m.f;

o.m=f;

o=f.m;

o=f;

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5) Consider the following code snippet :

var string2Num=parseInt("123xyz");

The result for the above code snippet would be :

123

123xyz

Exception

NaN

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Javascript MCQ - English

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Consider the following code snippet :

var c = counter(), d = counter(

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