Digital Electronics  Counters
Exercise :: Counters  General Questions
7. 
Integratedcircuit counter chips are used in numerous applications including: 
A. 
timing operations, counting operations, sequencing, and frequency multiplication  B. 
timing operations, counting operations, sequencing, and frequency division  C. 
timing operations, decoding operations, sequencing, and frequency multiplication  D. 
data generation, counting operations, sequencing, and frequency multiplication 
Answer: Option B
Explanation:

8. 
Synchronous construction reduces the delay time of a counter to the delay of: 
A. 
all flipflops and gates  B. 
all flipflops and gates after a 3 count  C. 
a single gate  D. 
a single flipflop and a gate 
Answer: Option D
Explanation:

9. 
Synchronous counters eliminate the delay problems encountered with asynchronous counters because the: 
A. 
input clock pulses are applied only to the first and last stages  B. 
input clock pulses are applied only to the last stage  C. 
input clock pulses are not used to activate any of the counter stages  D. 
input clock pulses are applied simultaneously to each stage 
Answer: Option D
Explanation:

10. 
What is the difference between combinational logic and sequential logic? 
A. 
Combinational circuits are not triggered by timing pulses, sequential circuits are triggered by timing pulses.  B. 
Combinational and sequential circuits are both triggered by timing pulses.  C. 
Neither circuit is triggered by timing pulses. 
Answer: Option A
Explanation:

11. 
What is the difference between a 7490 and a 7492? 
A. 
7490 is a MOD12, 7492 is a MOD10  B. 
7490 is a MOD12, 7492 is a MOD16  C. 
7490 is a MOD16, 7492 is a MOD10  D. 
7490 is a MOD10, 7492 is a MOD12 
Answer: Option D
Explanation:

12. 
What type of register is shown below?

A. 
Parallel in/parallel out register  B. 
Serial in/parallel out register  C. 
Serial/parallelin parallelout register  D. 
Parallelaccess shift register 
Answer: Option D
Explanation:
