Question

Which of the following is correct for a D latch?

(a) The output toggles if one of the inputs is held HIGH

(b) Q output follows the input D when the enable is HIGH

(c) Only one of the inputs can be HIGH at a time

(d) The output complement follows the input when enabled

I had been asked this question in final exam.

Asked question is from D Flip Flop in section Flip-Flops of Digital Circuits

Answer 1

The correct choice is (b) Q output follows the input D when the enable is HIGH

For explanation I would say: If the clock is HIGH then the D flip-flop operates and we know that input equals to output in case of D flip flop. It stores the value on the data line.