What logical operation does a NAND gate perform?
The correct answer is D: It produces a 0 at its output only if all inputs are 1. What logical operation does a NAND gate perform is that it produces a 0 at its output only if all inputs are 1. NAND = NOT AND, so output is 0 when all inputs are 1. For amateur radio operators, this is important for digital circuits. Understanding this helps when working with logic gates.
Exam Tip
NAND gate operation = produces 0 only if all inputs are 1. Think 'N'AND = 'N'OT 'A'ND (0 when all 1). NAND = NOT AND, so output is 0 when all inputs are 1. Not all 0, not produces 1, not some inputs - just 0 when all inputs are 1.
Memory Aid
"NAND gate operation = produces 0 only if all inputs are 1. Think 'N'AND = 'N'OT 'A'ND. NAND = NOT AND, so output is 0 when all inputs are 1. Important for digital circuits."
Real-World Application
A NAND gate: It produces a 0 at its output only if all inputs are 1. NAND is the inverse of AND - when all inputs are 1, output is 0. This is the operation - 0 when all inputs are 1.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Producing 0 only if all inputs are 0 isn't NAND - NAND produces 0 when all inputs are 1. All inputs 0 isn't NAND.
Option B: Incorrect. Producing 1 only if all inputs are 1 isn't NAND - NAND produces 0 when all inputs are 1. Producing 1 isn't NAND.
Option C: Incorrect. Producing 0 if some but not all inputs are 1 isn't NAND - NAND produces 0 when all inputs are 1. Some inputs isn't NAND.
题目解析
The correct answer is D: It produces a 0 at its output only if all inputs are 1. What logical operation does a NAND gate perform is that it produces a 0 at its output only if all inputs are 1. NAND = NOT AND, so output is 0 when all inputs are 1. For amateur radio operators, this is important for digital circuits. Understanding this helps when working with logic gates.
考试技巧
NAND gate operation = produces 0 only if all inputs are 1. Think 'N'AND = 'N'OT 'A'ND (0 when all 1). NAND = NOT AND, so output is 0 when all inputs are 1. Not all 0, not produces 1, not some inputs - just 0 when all inputs are 1.
记忆口诀
NAND gate operation = produces 0 only if all inputs are 1. Think 'N'AND = 'N'OT 'A'ND. NAND = NOT AND, so output is 0 when all inputs are 1. Important for digital circuits.
实际应用示例
A NAND gate: It produces a 0 at its output only if all inputs are 1. NAND is the inverse of AND - when all inputs are 1, output is 0. This is the operation - 0 when all inputs are 1.
错误选项分析
Option A: Incorrect. Producing 0 only if all inputs are 0 isn't NAND - NAND produces 0 when all inputs are 1. All inputs 0 isn't NAND. Option B: Incorrect. Producing 1 only if all inputs are 1 isn't NAND - NAND produces 0 when all inputs are 1. Producing 1 isn't NAND. Option C: Incorrect. Producing 0 if some but not all inputs are 1 isn't NAND - NAND produces 0 when all inputs are 1. Some inputs isn't NAND.
知识点
Logical operation, NAND gate, Produces 0, Only if all inputs are 1
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.