Practice ownership, lifetimes, traits, and memory safety with advanced Rust interview questions
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Understand trait bounds, associated types, and zero-cost abstractions
Learn lifetimes, smart pointers, and fearless concurrency
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Ownership, borrowing, and lifetimes
Traits and generics
Error handling (Result, Option)
Smart pointers (Box, Rc, Arc)
Concurrency and thread safety
Unsafe Rust and FFI
A: Each value has one owner. When owner goes out of scope, value is dropped. Borrowing: immutable references (&T, unlimited) or one mutable reference (&mut T). Cannot have mutable and immutable references simultaneously. Prevents data races at compile time. No garbage collector needed.
A: Lifetimes ensure references are valid. Prevent dangling references at compile time. Syntax: 'a in fn foo<'a>(x: &'a str). Compiler infers most lifetimes (elision rules). Needed when multiple references' relationship isn't clear. Common in structs holding references and function signatures.
A: String: owned, heap-allocated, mutable, growable (Vec<u8> wrapper). &str: borrowed string slice, immutable, fixed size, points to UTF-8 data. Use String when you need ownership/mutability, &str for function parameters (more flexible). String literals are &str with 'static lifetime.
A: Result<T, E> represents success (Ok(T)) or failure (Err(E)). Must handle explicitly: match, if let, unwrap (panics on error), expect, ? operator (propagates error). No exceptions - errors are values. This makes error handling explicit and visible in type system.
Master ownership, borrowing, and lifetimes - the core of Rust
Understand smart pointers: Box, Rc, Arc, RefCell, Mutex
Practice with traits and how they differ from interfaces in other languages
Know when to use Option and Result for error handling
Understand the difference between fearless concurrency and shared-state concurrency
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