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Null terminated value

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Hi guys
I recently joined the group and start the developer certification process.

I read the previous conversation about what to use about to fill extra space end of each field if field value is not enough to fill all space.
I am little confused in requirements it clearly says null terminated if less than the maximum length for the field. but in db file provided they use (byte)32 which is space character. So do we need to fill extra space with character or initial file fields uses all space with trailing space characters and we should put (byte)0 into extra spaces

I understood as the first choice but people mentioned that they used the other approach. Can anybody clarify?

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There are many discussions about the value to use for padding the strings (like here and here and here).

I think in the end it's a fairly simple decision (and one which is also easy to argument in the choices.txt): you get a file with spaces, so you use spaces for padding. I even think the null terminated is a left-over (from when the program was written in C/C++) and is only in the assignment to confuse you a little bit
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