Subsequently download the files named cod1, cod2, cod3, cod4 and cod5 available in Moodle and state which behaves as BCD, i.e. for 0000 is seen as 0, for 0111 is seen as 7 and so on.

BCD code:

Hint 1: do not analyse only the existing BCD combinations, also the "forbidden" ones.

Hint 2: pay attention to number 6, how do you write it? And in the traffic lights in the street?

1. Select cod1 to store and activate "Reserve". Wait whilst is beeing stored.

2. Activate combinations and obverse what is visualized

Introduce 0000

Introduce 0111

Introduce 1001

3. Establish a conclusion for file cod1, is it a BCD?

4. Do the same for the remaining files from cod2 to cod5. Remembers the hints given.

Result. Write an "X" over the correct answer, what file behaves as a BCD?

Cod1
Cod2
Cod3
Cod4
Cod5