This is a question a friend asked me recently, when he saw how cute olive is. He desires to get one as well, but he works 8 hours a day. It can extend more than that, if we factor in commuting time.
It's going to be hard but not impossible. Once he's home let's say after 10 hours, there's still more time to take care of his cat when he's back from work but it shouldn't be only because a cat is cute that makes him want to keep one.
Currently, I'm working 12 hours and I have three kittens that are under my care. It's not about how many hours someone is working but the true intent of taking care of a pet.
Yes, it's possible. Plenty of people who work 8 hours a day have cats. As long as the cat has food, water, a clean litter box, and attention before and after work, most cats are perfectly fine. They often sleep while you’re gone.