Question

Consider an 8 to 256 decoder built using 256 8-input AND gates.

1. For the decimal input A=65, 0x41, how many inverters will be used with the 8-input AND gate used to perform a successful decode of A?

2. Numbering the eight AND gate inputs a7 through a0, a7..a0, with a7 associated with the most significant bit of the input A and a0 associated with the least significant bit, list the inputs in descending order that will have an inverter .

For example if there were inverters at inputs a7, a1, and a0 you would write 710.

Answer 1