Which world are your living in bro? Everyone are moving to cloud databases these days. Don’t waste your time on these ancient technologies

Guys- thanks for your suggestions. There are certain organizations that do not want to go to cloud and certain organizations that cannot go to cloud in next 5 years. Even though, if some organization uses cloud for data, they can still use oracle as db. BTW, I am doing this certification as it is the prerequisite for one of the Professional certification. I am not wasting my time; I have clear path to follow. Anyways, thanks for your concerns.