I see a trailing question mark after fallible calls. How does it change control flow? *Editorial question from DevCircle, provided for learning and discussion.*

The borrow checker rejects two simultaneous mutable references. What rule am I violating? *Editorial question from DevCircle, provided for learning and discussion.*

How does Rust manage memory without requiring a garbage collector? *Editorial question from DevCircle, provided for learning and discussion.*

How should I represent a missing value compared with an operation that can fail? *Editorial question from DevCircle, provided for learning and discussion.*

Functions often accept &str even when my variable is a String. Why? *Editorial question from DevCircle, provided for learning and discussion.*