Consider the following code snippet
var a1 = [,,,];
var a2 =
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var a2 =
Consider the following code snippet
var a1 = [,,,];
The result would be
var a2 = new Array(3);
0 in a1
0 in a2
true false
false true
true true
false true
Answer : A
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1) Consider the code snippet given below
var count = [1,,3];
What is the observation made?
The omitted value takes “undefined”
This results in an error
This results in an exception
None of the mentioned
View Answer
2) Consider the following code snippet :
if (!a[i]) continue;
What is the observation made ?
Skips the undefined elements
Skips the non existent elements
Skips the null elements
All of the mentioned
View Answer
3) What will happen if reverse() and join() methods are used simultaneously ?
Reverses and stores in the same array
Reverses and concatenates the elements of the array
Reverses
All of the mentioned
View Answer
4) The pop() method of the array does which of the following task ?
decrements the total length by 1
increments the total length by 1
prints the first element but no effect on the length
None of the mentioned
View Answer
5) 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 ?