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Important Digital Logic and Design Short Questions

Chapter: 11
Question 1:
What is the function of a 7-segment display in digital circuits?
Answer: A 7-segment display shows decimal numbers 0 to 9 by lighting up specific segments based on the input.
Chapter: 11
Question 2:
What is the purpose of a BCD to 7-segment decoder?
Answer: The BCD to 7-segment decoder converts a 4-bit BCD input into the appropriate signals to light up the segments of a 7-segment display.
Chapter: 12
Question 3:
What does a comparator circuit do?
Answer: A comparator circuit compares two numbers and sets one of its three outputs to 1, indicating the result of the comparison operation.
Chapter: 12
Question 4:
How many outputs does a 2-bit comparator have?
Answer: A 2-bit comparator has three outputs: A>B, A=B, and A<B.
Chapter: 12
Question 5:
When is the output A>B set to 1 in a comparator circuit?
Answer: The output A>B is set to 1 when the input combinations are 01 00, 10 00, 10 01, 11 00, 11 01, and 11 10.
Chapter: 12
Question 6:
When is the output A=B set to 1 in a comparator circuit?
Answer: The output A=B is set to 1 when the input combinations are 00 00, 01 01, 10 10, and 11 11.
Chapter: 12
Question 7:
What are the input and output bit representations in a comparator circuit?
Answer: The circuit has a 4-bit input, with 2 bits representing A and 2 bits representing B, and a 3-bit output representing A>B, A=B, and A<B.
Chapter: 12
Question 8:
How is the function of a comparator circuit represented?
Answer: The function of a comparator circuit is represented using a function table with three outputs corresponding to A>B, A=B, and A<B.
Chapter: 12
Question 9:
What happens when the number of variables in a Karnaugh map exceeds 4?
Answer: The Karnaugh map method becomes difficult to manage and may include redundant groups, leading to non-simplified expressions.
Chapter: 12
Question 10:
What is the Quine-McCluskey simplification method?
Answer: The Quine-McCluskey method simplifies Boolean expressions through an exhaustive search to remove shared variables, resulting in minimal product terms.