Yes, it is generally recommended to bring a professional-looking briefcase or portfolio to an interview instead of a backpack. This will give a more polished and organized impression to the interviewer.
roller backpacks because you have a lot of books
Yes, you can.
It would be helpful to bring a list of questions to an interview, and it helps you look prepared. Just don't have a lot of answers to questions on there.
you bring paper and pencil and a backpack
If you can bring a military tactical 30L backpack to school will depend upon the school you are going to. Many schools are now requiring students to wear only clear backpacks, so this backpack would not be allowed.
You can bring a backpack on a plane as a personal item. Most airlines will allow you to carry on the backpack rather then check it in.
a backpack
drink
A school backpack should weigh less then 15 % of your body weight.
Yes, you can take a backpack on a plane as carry-on luggage as long as it still fits the size and weight restrictions for carry-on baggage.
you put it in your locker or just dont bring one
you put it in your locker or just dont bring one