# Instrumentation Transducers Questions and Answers – Shift Registors and Counters

This set of Instrumentation Transducers Multiple Choice Questions & Answers (MCQs) focuses on “Shift Registors and Counters”.

1. Which of the following is correct for data transfer in shift register?
a) Serial manner
b) Parallel manner
c) Both serial and parallel
d) None of the mentioned

Explanation: In shift registers, data can be transferred in both serial and parallel fashion.

2. Which of the following is correct for serial mode shift register?
a) One bit per clock pulse
b) One byte per clock pulse
c) Two bit per clock cycle
d) Unpredictable

Explanation: In serial mode transfer in shift registers, one bit of data is transferred in one clock pulse.

3. Which of the following flip flops can be used for making shift registers?
a) T flip flop
b) JK flip flop
c) SR flip flop
d) All of the mentioned

Explanation: Shift registers are made up of flip flops.

4. Which of the following is not a valid BCD?
a) 0110
b) 0111
c) 1000
d) 1010

Explanation: Binary numbers 0000 to 1001 are known as valid BCD numbers.

5. Which of the following have high propagation delay?
a) Synchronous counter
b) Asynchronous counter
c) Both have the same propagation delay
d) Both have an unpredictable propagation delay

Explanation: Propagation delay is high in case of asynchronous counters since the clock pulse is given to the first flip flop only.

6. Asynchronous counters does not need a clock pulse.
a) True
b) False

Explanation: Asynchronous counters require clock pulses, they are given to first flip flop.

7. In a BCD counter count 1010 corresponds to ____________
a) Ten
b) Zero
c) Two
d) One

Explanation: Valid BCD numbers are from 0000 to 1001, and count 1010 corresponds to zero.

8. What will be the final count value if 10 flip flops are used?
a) 100
b) 1024
c) 1023
d) 99

Explanation: Count Value is the number of flip flops to the power of two. That is from zero to 1023.

9. Read in data of shift register will be _____________
a) Serial
b) Parallel
c) Both serial and parallel
d) Unpredictable

Explanation: Always read in data of shift register is done in a serial manner.

10. Each flip flop in shift register act as_______________
a) Frequency multiplier
b) Frequency divider
c) Frequency doubler

Explanation: Flip flop act as frequency divider, that is they reduce the input frequency.

Sanfoundry Global Education & Learning Series – Instrumentation Transducers.

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