Electronica Finance Interview Questions and Answers

State can be managed globally in React using context API or third-party libraries like Redux.

• Context API allows you to create a global state that can be accessed by any component in the React tree.

• Redux is a popular library for managing global state in React applications.

• With Redux, you can define a central store that holds the state and use actions and reducers to update and retrieve the state.

• Other libraries like MobX and Zustand can also be used for global state management...read more

I have worked on Windows, Linux, and macOS operating systems.

• Windows

• Linux

• macOS

useMemo() is a hook in React that memoizes the result of a function, while useCallback() memoizes the function itself.

• useMemo() is used to optimize performance by caching the result of a function and only recomputing it when its dependencies change.

• useCallback() is used to optimize performance by memoizing a function and only creating a new instance when its dependencies change.

• Both hooks are useful when dealing with expensive calculations or when passing callbacks to child c...read more

Device drivers are software programs that allow the operating system to communicate with hardware devices.

• Device drivers act as a translator between the hardware device and the operating system.

• They provide a standardized way for the operating system to interact with different hardware devices.

• Examples include drivers for printers, graphics cards, network adapters, and USB devices.

React hooks are functions that allow you to use state and other React features in functional components.

• React hooks were introduced in React 16.8 as a way to write reusable logic in functional components.

• They allow you to use state and other React features without writing a class component.

• Hooks like useState and useEffect are commonly used in React applications.

• useState hook allows you to add state to functional components.

• useEffect hook is used for side effects like fetchin...read more

Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their containing scope during compilation.

• Variables and functions are hoisted to the top of their scope.

• Only declarations are hoisted, not initializations.

• Function declarations are hoisted before variable declarations.