MCQ IN COMPUTER SCIENCE & ENGINEERING

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COMPUTER SCIENCE AND ENGINEERING

DIGITAL LOGIC

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
OR gate with schematic “bubbles” on its inputs performs the same functions as ____ gate.
A
NOT
B
EX-OR
C
NAND
D
NOR
Explanation: 

Detailed explanation-1: -NAND Gate: The NAND gate represents the complement of the AND operation. Its name is an abbreviation of NOT AND. The graphic symbol for the NAND gate consists of an AND symbol with a bubble on the output, denoting that a complement operation is performed on the output of the AND gate.

Detailed explanation-2: -The NAND Gate Essentially, a NAND gate behaves the same as an AND gate with a NOT (inverter) gate connected to the output terminal. To symbolize this output signal inversion, the NAND gate symbol has a bubble on the output line.

Detailed explanation-3: -The NAND gate is the same function as an AND gate with the output inverted. The logic symbol for a NAND gate is the same as an AND gate except it has a small bubble on the output to indicate that the output is inverted.

Detailed explanation-4: -∴ NAND and NOR gates are called universal gates because they can be combined to produce any of the other gates like OR, AND, and NOT gates. Hence the correct option is option (B).

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