Question

Digital circuits can be made by repetitive use of

• A. OR gates
• B. NAND gates
• C. NOT gates
• D. AND gates

Answer 1

The correct option is B

NAND gates

Reason for the correct option-

1. NAND gate is called the universal gate
2. A combination of NAND gates can be used to produce OR, NOT, AND gates
3. Hence, by repetitively using NAND we can perform any basic operation.
4. The digital circuit is made by repetitive use of the NAND gate.

Reason for the wrong option-

1. All the other gates cannot produce an inverted output.
2. Hence, they cannot be repetitively used for a digital circuit.

Therefore, option (B) is the correct answer.