UCR CS 122B
Winter 2004
Prof. Frank Vahid                     Name: ____________________________

Quiz 4


1. Two designers need to build a system that uses three new peripherals. 
   Designer A is in a hurry, so just codes the peripheral drivers based 
   their datasheet information. Designer B is also in a hurry, but spends
   4 hours just experimenting with each peripheral (so 12 hours total). 
   The base time for designing the system is 100 hours. However, A 
   encounters problems that requires extensive debugging, extending the 
   base design time by 50%. The problems were related to ambiguities
   in the datasheets of the peripherals. 
   B detected these databook ambiguities during experimenting with 
   each peripheral alone, and thus only required 5 hours of debugging
   beyond the base time. How long did each designer require to build
   the system?

















2. According to Ganssle, what is the software bug rate? ______________
   Based on that bug rate, if you write a 1,000 line program, how many
   bugs would that program contain? _____________


3. What are the two key principles of debugging that was
   mentioned in class?  Each is just one word. I gave you the first letters.

   O_____________________

   C______________________