[Tutor] capturing error msg in exception

[Payal]

Hi,
Again a few queries regarding exceptions,

a. What is the difference between,

except ZeroDivisionError as e: print 'Msg : ' , e
except ZeroDivisionError ,e: print 'Msg : ' , e

Both show,
Msg :  integer division or modulo by zero

b. What is portable and correct way of writing,

except (NameError, ZeroDivisionError) as e: print 'Msg : ' , e

c. What is the correct Python of writing,
except  as e: print 'Msg : ' , e        # Capturing all exceptions

Thanks a lot for the help in advance.
With warm regards,
-Payal
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p.s. I am always confused where does one put the "?" when I am framing the
questions like I have done above (a, b and c)? 
This is completely OT query for native english speaking people :-)