Explain React classes, lifecycle, and hooks

Company: Snowflake

Role: Frontend Engineer

Category: Software Engineering Fundamentals

Difficulty: medium

Interview Round: Technical Screen

Quick Answer: This question evaluates understanding of React class and function components, lifecycle phases, Hooks (including state and effect handling), code reuse strategies, and common pitfalls such as stale closures and incorrect dependency arrays, measuring competency in frontend component architecture and state/side-effect reasoning.