what is the problem of this java question?

Question

I found the below question from the challenge quizzes. I responded dot(.) and I got WRONG :(
I was very sure while responding and I checked it on a compiler and I was RIGHT. but when I check for the correct answer on the challenge it was given as "error". I don't get what the error is. Do you?

public static void main(String[] args) {
String a="Programming is awesome.";
System.out.println(a.charAt(a.length()-1));
}

Answer 1

Thank you Sami Khan. I never noticed that even when I write it on a compiler. tricky quiz!

Answer 2

Okey, Here is the google drive link to the screenshot.
https://drive.google.com/open?id=0Bw-oZgIQOMMwNWFaa3NSWXJDb1E

Answer 3

I have the screenshot. But how can I share it.

Answer 4

recheck the screenshot.. it is written "a.length"
whereas ".length()" is the method not ".length"
therefore it says as error

Answer 5

yeah it is.. 😉

Answer 6

do u have the screenshot of the challenge question?
Since the answer is correct, it shouldn't be an error

Answer 7

upload it to Google drive or any cloud share and share it via link and copy the link and paste it here