Genex Corporate Services Fullstack Developer Intern Interview Questions and Answers

Q1. What are hooks in reactjs? How many you used?
Ans. 
Hooks in ReactJS are functions that let you use state and other React features in functional components. I have used useState and useEffect hooks.
• Hooks are introduced in React 16.8 to allow state and lifecycle features in functional components.

• useState hook is used to add state variables in functional components.

• useEffect hook is used to perform side effects in functional components, similar to componentDidMount and co
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Q2. Difference between Controlled Components and Uncontrolled Components
Ans. 
Controlled components are controlled by React state, while uncontrolled components manage their own state internally.
• Controlled components are controlled by React state and their value is set by the parent component.

• Uncontrolled components manage their own state internally and their value is handled by the DOM.

• Controlled components provide more control and flexibility, while uncontrolled components are simpler to imple...read more
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When to use what type of Database?