Important Digital Logic and Design Short Questions
Chapter: 5
Question 1:
When does a NAND gate output a 0?
Answer:
A NAND gate outputs a 0 only when all its inputs are 1. For all other combinations, the output is 1.
Chapter: 5
Question 2:
How can an AND gate be implemented using NAND gates?
Answer:
An AND gate can be implemented using two NAND gates. The first NAND gate's output is inverted by a second NAND gate used as a NOT gate.
Chapter: 5
Question 3:
How can an OR gate be implemented using NAND gates?
Answer:
An OR gate can be implemented using three NAND gates by applying the alternate symbolic representation of the OR gate.
Chapter: 5
Question 4:
What is the main function of a NOR gate?
Answer:
A NOR gate performs an OR-NOT function and outputs 1 only when all its inputs are 0.
Chapter: 5
Question 5:
How is a NOR gate symbolically represented?
Answer:
A NOR gate is symbolically represented as an OR gate with a NOT gate (bubble) at the output.
Chapter: 6
Question 6:
What is a universal gate?
Answer:
A universal gate is a gate like NOR or NAND that can be used to implement AND, OR, and NOT gates.
Chapter: 6
Question 7:
How can a NOT gate be implemented using a NOR gate?
Answer:
A NOT gate can be implemented by connecting both inputs of a NOR gate together.
Chapter: 6
Question 8:
What happens when you connect two NOR gates in a specific way?
Answer:
Connecting two NOR gates in series can implement an OR gate by canceling the NOT operation.
Chapter: 6
Question 9:
How can an AND gate be implemented using NOR gates?
Answer:
An AND gate can be implemented using three NOR gates based on its alternate symbolic representation.
Chapter: 6
Question 10:
What property makes NAND and NOR gates universal?
Answer:
NAND and NOR gates can be used to implement any of the basic logic gates like AND, OR, and NOT.