What is a key prop in React?
The key
prop in React is a special attribute used to uniquely identify elements within a collection (such as an array) when rendering lists of elements. It provides efficient updates to the UI by helping React determine which items have changed, been added, or been removed from the list. Keys should be unique among siblings and stable between renders, and they are essential for optimizing rendering performance and enabling efficient reconciliation of list updates.
Top React Components Interview Questions & Answers
React Component is the building blocks of the React application. It is the core concept that everyone must know while working on React. In this tutorial, we will see the top React Components questions that can be asked in the interview.
Let’s discuss some common questions that you should prepare for the interviews. These questions will be helpful in clearing the interviews, especially for the frontend development or full stack development role.