MuGenesys Software Junior Software Engineer Interview Questions, Process, and Tips

A pure component is a component that only depends on its input props and has no side effects.

• Pure components are written as functional components in React.

• They are used to improve performance by reducing unnecessary re-renders.

• Pure components should not modify their input props.

• Examples of pure components include buttons, input fields, and other UI elements.

• React.memo() can be used to memoize pure components.

State refers to the current condition or status of an object or system.

• State can be used to describe the current values of variables in a program.

• State can also refer to the current mode or status of a device or system.

• State can be changed through user input or program logic.

• Examples of state include the current position of a cursor on a screen or the current temperature of a room.

Redux is a predictable state container for JavaScript apps.

• Redux is a library for managing application state

• It provides a single source of truth for the entire application

• Actions are dispatched to update the state, which triggers a re-render of the UI

• Selectors can be used to retrieve specific parts of the state

• Middleware can be used to intercept and modify actions before they reach the reducers