Unix questions

1. Cp a.txt ../b.txt What happens to disk data of a. Text? (original deleted identical generated, no change identical generated, no change no new data, none of the above)

2. Using mv? What happens to disk data of a. Text? (original deleted identical generated, no change identical generated, no change no new data, none of the above)

3. Using ln? What happens to disk data of a. Text? (original deleted identical generated, no change identical generated, no change no new data, none of the above)