Array And Function

The pop() method of the array does which of the following task ?

What will happen if reverse() and join() methods are used simultaneously ?

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

The reduce and reduceRight methods follow a common operation called

The method or operator used to identify the array is

What is a closure?

Which of the following are examples of closures?

Which of the following uses a lot of CPU cycles?

What is the fundamental rule of lexical scoping?

What is the opposite approach to the lexical scoping?

What is the purpose of the dynamic scoping?

Which of the algorithmic languages is lexical scoping standardized in?

The function definitions in JavaScript begins with

When does the function name become optional in JavaScript?

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

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

A function with no return value is called

Do functions in JavaScript necessarily return a value ?

What kind of scoping does JavaScript use?

What must be done in order to implement Lexical Scoping?

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 ?

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?

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?

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

Consider the following code snippet : var grand_Total =eval (" 10*10+5 ")

The output for the above statement would be :

Consider the following code snippet : var tensquared = ( function ( x ) {return x * x

}( 10 ))

Will the above code work ?

Consider the following code snippet : var string2Num =parseInt (" 123xyz ")

The result for the above code snippet would be :

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

For the below mentioned code snippet: var o = new Object ()

The equivalent statement is:

What is the difference between the two lines given below ? !!( obj1 && obj2 )

( obj1 && obj2 )

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 :

Consider the following code snippet : var c = counter () , d = counter ()

function constfuncs () { var funcs = []

for(var i = 0

i < 10

i ++ ) funcs [ i ] = function () { return i

}

return funcs

} var funcs = constfuncs ()

funcs [ 5 ]() What does the last statement return ?

Consider the following code snippet : var scope = "global scope"
function checkscope () { var scope = "local scope"
function f ()
{
return scope
}
return f
What is the function of the above code snippet?

Consider the code snippet given below var count = [ 1 ,, 3 ]
What is the observation made?

Consider the following code snippet var a1 = [,,,]
var a2 = new Array ( 3 )
0 in a1 0 in a2 The result would be

Consider the following code snippet : if ( !a [ i ]) continue
What is the observation made ?

Consider the following code snippet : var a = [ 1 , 2 , 3 , 4 , 5 ]
a . slice ( 0 , 3 )
What is the possible output for the above code snippet ?

Consider the following code snippet : var a = []
a . unshift ( 1 )
a . unshift ( 22 )
a . shift ()
a . unshift ( 3 , [ 4 , 5 ])
a . shift ()
a . shift ()
a . shift ()
The final output for the shift() is