Answer Key to Sample Exam

1. e.  (a, b, and c are all possible)
2. b. (zero is at pi on pole/zero diagram, but at zero on freq resp)
3. e. (both b and c hold)
4. e. 
5. b. 
6. b. 
7. d. 
8. a. (careful with this...although we expect 6cos(2*pi*4096*t), it is also POSSIBLE that the signal was generated by 12cos(2*pi*4096*t+pi3))
9. c.
10. e.