Final answer:
Yes, the output of a NAND gate is low only when all inputs are high. This is due to the NAND gate being an inverted AND gate, so it outputs the opposite of what an AND gate would under the same inputs.
Step-by-step explanation:
The question regarding the output of a NAND gate falls under the domain of Computers and Technology, specifically digital logic, which is typically a high school-level topic. To answer the question: Yes, the output of a NAND gate is low only when all inputs are high. This is because a NAND gate is the negation of an AND gate, meaning it performs the AND operation and then inverts the result. The truth table of a NAND gate reflects that when each input is high (1), the output of the AND operation would be high, but since this is a NAND gate, the output is inverted to low (0). However, if any one (or more) of the inputs are low (0), the output of the AND operation would be low, and the inversion by the NAND operation results in a high output (1).