Softronics Fullstack Java Developer Interview Questions and Answers

Hooks in React JS are functions that let you use state and other React features without writing a class.

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

• useState() is a hook that allows you to add state to functional components.

• useEffect() is a hook that allows you to perform side effects in functional components.

• Custom hooks can be created to reuse logic across mul

A pure function in JavaScript is a function that always produces the same output for the same input and has no side effects.

• Always returns the same output for the same input

• Does not modify any external state or variables

• No side effects such as console.log or network requests

• Example: function add(a, b) { return a + b; }