Question

An AND gate can be prepared by repetitive use of:

• A. NOT gate
• B. OR gate
• C. NAND gate
• D. NOR gate

Answer 1

Answer: (C), (D)

NOR gate

AND gate:

1. AND gate is a logic gate. It is an electric circuit that combines 2 signals and gives on as the output if both the signals are present.

Correct Options: Option C: NAND gate:

1. It is a logic gate which gives the outputs that are opposite to AND gate.
2. It is a universal gate, which means that any other gate can be formed using it.
3. The repetitive use of NAND gate can create a AND gate as shown in below diagram.

Option D: NOR gate:

1. It is a logic gate which gives the outputs that are opposite to OR gate.
2. It is a universal gate, which means that any other gate can be formed using it.
3. The repetitive use of NOR gate can create a AND gate as shown in below diagram.

Incorrect Options:

1. Option A: NOT gate is a logical gate which gives on as output if signal is present an off as output if signal is absent. It cannot form AND gate by repetition.
2. Option B: OR gate is a logical gate which gives on as output if at least one signal is present. It cannot form AND gate by repetition.

Hence, the correct options are option C and option D.