You need to ask questions, but also realize that 50-99% of them, depending on what you're working on, will be answered by doing a Google search and clicking the first Stack Overflow link you see.
Your company might be different, and sure some knowledge of system is only available from seniors, but your company still will have enough documentation, if a search for keywords in it likely to get results.
I did. 90% of their questions were 1 Google search and 1 stack overflow click away.