Interview Strike: React & .NET Interview Prep

React makes it easy to manage local component state with useState and useReducer. But as apps grow, so does the complexity of state. Passing data through multiple layers of components (prop drilling) becomes frustrating. That’s where state management patterns and libraries beyond React come in. In this blog, we’ll cover when to lift state, when to use global stores, and explore popular tools like Redux Toolkit, React Query, Zustand, MobX, and even a Context + Reducer pattern. 1. When to Move State Up vs External Store Definition : Moving state up → Keeping shared state in a common parent component to avoid prop drilling. External store (global state) → Keeping state outside React components (e.g., Redux, Zustand) so multiple parts of the app can access it directly. Explanation : Use lifting state up if only a few components need the data. Use an external store if many unrelated parts of the app need the same state (e.g., user authentication, theme, shopping cart). Example (Prop Drilli...