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## Which logic gate has the output of high if any of the inputs are low?

NAND gates

The outputs of all NAND gates are high if any of the inputs are low.

## In which gate output is high if and only if all inputs are high?

The output of an AND gate is HIGH only when all inputs are HIGH. The output of a NAND gate is HIGH whenever one or more inputs are LOW. The output of a NOR gate is LOW whenever one or more inputs are HIGH. The output of an XOR gate is HIGH whenever the two inputs are different.

## In which of the following gates the output is high if and only if at least one input is high?

NAND gate

The truth table of NAND gate is shown as above, which implies that if at least one of the input is low then the output is high.

## Which gate will only output a low when both inputs are low?

A LOW (0) output results only if all the inputs to the gate are HIGH (1); if any input is LOW (0), a HIGH (1) output results. A NAND gate is made using transistors and junction diodes….NAND gate.

Input | Output | |
---|---|---|

0 | 0 | 1 |

0 | 1 | 1 |

1 | 0 | 1 |

1 | 1 | 0 |

## In which of the following gates the output is 1 and only if at least one input is 1?

XOR gate – output is 1 if ONLY one input is 1.

## Which is logic gate has output high if and only if all inputs are low?

So, since an AND gate only has high output when all inputs are high, a NAND gate will only have low output when all it’s inputs are high. The NAND gate is particularly significant because NAND is a complete set in terms of logic operations, that is, with only NAND gates, you can simulate any logic function.

## Is the output of a gate positive or negative?

This 2 level logic also called Positive and Negative Logic. AND gate has two or more than two inputs and only one Output. In AND gate Output is High or 1 only when each input of it has in the HIGH state.

## When does an Exclusive NOR gate produce a 1 output?

An exclusive-NOR (X-NOR) gate is a coincidence gate. It produces a 1 output only when even number of 1 is present at the input. A 2-input X-NOR gate is an equality detector. It produces a 1 output only when its two inputs are equal i.e when both inputs are 1 or 0.

## When does the output of a NAND gate is 0?

When AND output is NOTed or Inverted then it is called NAND gate. The output is 0 only if each input is 1 and output is 0 if anyone of any input or all inputs are 0. This means when all inputs are 1 then the output will 1 otherwise if different combinations of input the output is 0.