RealPage Senior Software Engineer Interview Questions and Answers

Reconciliation in React is the process of updating the virtual DOM to match the actual DOM.

• Reconciliation is the process of comparing the virtual DOM with the actual DOM and making necessary updates.

• React uses a diffing algorithm to efficiently update the DOM without re-rendering the entire component tree.

• Key prop is important for React to efficiently reconcile elements and maintain component state.

• Reconciliation can b...read more

Performance optimization in React is crucial for creating fast and efficient web applications.

• Use React.memo and PureComponent to optimize rendering performance by preventing unnecessary re-renders.

• Avoid unnecessary re-renders by using shouldComponentUpdate or React.memo with custom comparison functions.

• Use code splitting and lazy loading to reduce initial load time and improve performance.

• Optimize component rendering ...read more

Hooks in React are functions that let you use state and other React features in functional components.

• Hooks were introduced in React 16.8 to allow state and lifecycle features in functional components.

• useState() hook is used to add state to functional components.

• useEffect() hook is used to perform side effects in functional components.

• Custom hooks can be created to reuse stateful logic across components.