i just want to refer/reply two comments here (plz never mind if they have already got a reply).
tepp (comment # 14):
yes, you should try to make a wild guess in questions where you are not certain as zend will never deduct any marks for ur wrong answers (i.e. there will be NO negative marking).
Ghiraj Patra (comment # 31): the correct answer for Q#5 is indeed a "null" (not "nothing")..as according to the PHP manual, if the return() is omitted the value NULL will be returned.
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