REACT Interview Ouestions And Answers

1.What is the virtual DOM?
2.What is JSX?
3.Why can’t browsers read JSX?
4.What are synthetic events in React?
5.What are Higher Order Components(HOC)?
6.What are Pure Components?
7.What is React Router?
8.What are the major features of React?
9.What is the difference between Element and Component?
10.How to create components in React?
11.When to use a Class Component over a Function Component?
12.What is state in React?
13.What are props in React?
14.What is the difference between state and props?
15.What is "key" prop and what is the benefit of using it in arrays of elements?
16.What is the difference between Shadow DOM and Virtual DOM?
17.What is React Fiber?
18.What are controlled components?
19.What are uncontrolled components?
20.What is the difference between createElement and cloneElement?
21.What is Lifting State Up in React?
22.What is context?
23.What is reconciliation?
24.Why React uses className over class attribute?
25.What are fragments?
26.What are stateless components?
27.What are stateful components?
28.Can you force a component to re-render without calling setState?
29.What is the difference between React and ReactDOM?
30.Why you can't update props in React?