Logic Gates

Question 1

Universal Gates

Answer 1

NOR and NAND

Question 2

Which gate gives high output if either input A or B or both are low otherwise it gives high output

Answer 2

NAND gate

Question 3

Which gate gives low output if either input A or B or both are low otherwise it gives high output

Answer 3

AND gate

Question 4

Which gate gives high output if either input A or B or both are high otherwise it gives low output

Answer 4

OR gate

Question 5

Which gate produces output only when the two inputs are the same

Answer 5

EX-NOR

Question 6

Logic equation of an EX-NOR gate having A and B as its input is

Answer 6

A’B’+AB

Question 7

In which gate the output is low, when both the inputs are high

Answer 7

NAND

Question 8

In which gate the output is low when both the inputs are different and high when both the inputs are same

Answer 8

EX-NOR

Question 9

How many number of NAND and NOR gates required for the formation of NOT gates

Answer 9

NAND-1, NOR-1

Question 10

How many number of NAND and NOR gates required for the formation of AND gates

Answer 10

NAND-2, NOR-3

Question 11

How many number of NAND and NOR gates required for the formation of OR gates

Answer 11

NAND-3, NOR-2

Question 12

How many number of NAND and NOR gates required for the formation of XOR gates

Answer 12

NAND-4, NOR-5

Question 13

How many number of NAND and NOR gates required for the formation of XNOR gates

Answer 13

NAND-5, NOR-4

Question 14

How many number of NAND and NOR gates required for the formation of NOR gates

Answer 14

NAND-4, NOR-1

Question 15

How many number of NAND and NOR gates required for the formation of NAND gates

Answer 15

NAND-1, NOR-4

Question 17

The minimum number of 2-input NAND gates required to implement a 2-input X-OR gate is

Answer 17

4