Important Digital Logic and Design Short Questions
Chapter: 34
Question 1:
Explain the function of a Bi-directional Shift Register.
Answer:
A Bi-directional Shift Register allows data to be shifted left or right based on the control signal, enabling flexible data movement in either direction.
Chapter: 34
Question 2:
What does the 74HC164 shift register do?
Answer:
The 74HC164 is an 8-bit Serial In/Parallel Out shift register that enables serial data input and provides parallel outputs after data is shifted.
Chapter: 34
Question 3:
How is data loaded into a Parallel In/Serial Out shift register?
Answer:
Data is loaded in parallel and then shifted out serially, one bit at a time, using clock signals.
Chapter: 34
Question 4:
What distinguishes a Parallel In/Parallel Out shift register from other types?
Answer:
A Parallel In/Parallel Out shift register allows parallel data entry and provides parallel data output, without shift operations.
Chapter: 34
Question 5:
What is the purpose of the SHIFT/LOAD input in a Parallel In/Serial Out register?
Answer:
The SHIFT/LOAD input is used to load data into the register in parallel and to control the shifting operation.
Chapter: 34
Question 6:
How does the 74HC195 shift register operate?
Answer:
The 74HC195 can function as a Parallel In/Parallel Out, Serial In/Parallel Out, or Serial In/Serial Out register, depending on the control signals and inputs.
Chapter: 34
Question 7:
What is a Johnson Counter and its key feature?
Answer:
A Johnson Counter is a type of shift register counter where the last flip-flop’s output is connected to the first flip-flop’s data input, creating a unique sequence of states.
Chapter: 34
Question 8:
Describe the operation of a Ring Counter.
Answer:
In a Ring Counter, the output of the last flip-flop is connected to the first flip-flop, with an initial high state in the first flip-flop, which rotates through the flip-flops with each clock pulse.
Chapter: 35
Question 9:
What is the primary application of a shift register?
Answer:
A shift register is primarily used to convert between parallel and serial data formats.
Chapter: 35
Question 10:
How does a Serial In/Parallel Out shift register work?
Answer:
It shifts in serial data bit by bit and outputs it in parallel form when the shift operation is complete.