And going to add that with all of these, it's not that you necessarily have to have a specific, one-word answer, but that you should have *some* thought process behind it indicating on-going attention to your child.
Maybe you don't know your child's shoe size because they're growing so much, or because shoe brands all have different sizing systems, but you know how to check what your child's current shoe-size is. Maybe you're not sure who their pediatrician is because health insurance is a nightmare, but you know the doctors who've treated them before and have an idea of who you would go to if they needed treatment now. You might not know who is your child's best friend, but you should know about at least some of their friends.
(Willingness to cooperate in areas you are less familiar with can also be a major contributing factor in how custody agreements shake out. My parents' divorce was messy af, but my mom's willingness to defer to my dad on my education and my dad's willingness to defer to my mom on my health played a huge role in making sure they both remained a major part of my life. They didn't have to know everything, but they did have to know who they would go to for those specific things -- even if that meant the person they hated most at the time. Putting their love for their child over their hate for the ex-partner was a statement, in and of itself, to the custody court.)