16. How many flip-flops are required to make a MOD-32 binary counter?
(a) 3
(b) 45
(c) 5
(d) 6
17. Which is not an example of a truncated modulus?
(a) 8
(b) 9
(c) 11
(d) 15
18. A modulus-10 counter must have ________.
(a) 10 flip-flops
(b) flip-flops
(c) 2 flip-flops
(d) synchronous clocking
19. A 5-bit asynchronous binary counter is made up of five flip-flops, each with a 12 ns propagation delay. The total propagation delay (tp(tot)) is ________.
(a) 12 ms
(b) 24 ns
(c) 48 ns
(d) 60 ns
20. How many different states does a 3-bit asynchronous counter have?
(a) 2
(b) 4
(c) 8
(d) 16
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