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
Answer : A
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1) 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
2) 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
3) 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
4) 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 ?
5) The reduce and reduceRight methods follow a common operation called
