Stack to heap

Understanding stack and heap allocation in Rust

This is an easy language-knowledge question that tests whether you understand Rust's memory model and the distinction between stack and heap allocation. It's a foundational concept that appears in technical screening rounds because it underpins safe and efficient Rust code.

To answer questions like this, you need to recognize the Rust construct that explicitly allocates memory on the heap rather than letting values live on the stack by default. The question probes whether you can name and distinguish the mechanism—a skill that matters when reasoning about ownership, performance, and memory layout in real Rust programs.

• Stack vs. heap trade-offs (speed, size, lifetime)
• Rust's default allocation behaviour
• Ownership and move semantics across memory regions