Q. What is a closure?

View solution

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

View solution

Q. What kind of scoping does JavaScript use?

View solution

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

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

View solution

Q. For the below mentioned code snippet:

var o = new Object();

The equivalent statement is:

View solution

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

View solution

Q. Consider the following code snippet :

var string2Num=parseInt("123xyz");

The result for the above code snippet would be :

View solution

Q. Consider the following code snippet :

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

Will the above code work ?

View solution

Q. Do functions in JavaScript necessarily return a value ?

View solution

Q. Consider the following code snippet :

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

The output for the above statement would be :

View solution

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

View solution

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?

View solution

Q. A function with no return value is called

View solution

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

View solution

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

View solution

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

View solution

Q. The function definitions in JavaScript begins with

View solution

Q. The method or operator used to identify the array is

View solution

Q. The reduce and reduceRight methods follow a common operation called

View solution

Q. The primary purpose of the array map() function is that it

View solution