niece's class 10 results day at my sister's place. my 7 yr old wants to know if she has to do it too

everyone crying. happy crying, mostly. niece did well. my daughter watched the whole thing from the sofa, very quiet. in the car she asked why everyone cried, and if she also has to do 'results' when she's big. told her it's a long way off. she said 'how long'. she'll be in class 3 now, so i said about seven years. she counted on her fingers and went silent again 😂 not sure if i handled that well. is there a better answer for a 7 yr old