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Entrevista
. What is React? React is a front-end and open-source JavaScript library which is useful in developing user interfaces specifically for applications with a single page. It is helpful in building complex and reusable user interface(UI) components of mobile and web applications as it follows the component-based approach. The important features of React are: It supports server-side rendering. It will make use of the virtual DOM rather than real DOM (Data Object Model) as RealDOM manipulations are expensive. It follows unidirectional data binding or data flow. It uses reusable or composable UI components for developing the view
Preguntas de entrevista [1]
Pregunta 1
What is useState() in React? The useState() is a built-in React Hook that allows you for having state variables in functional components. It should be used when the DOM has something that is dynamically manipulating/controlling. In the below-given example code, The useState(0) will return a tuple where the count is the first parameter that represents the counter’s current state and the second parameter setCounter method will allow us to update the state of the counter.
