Accenture Senior Software Engineer Interview Questions, Process, and Tips

Class is a blueprint for creating objects with properties and methods, while functional component is a function that returns JSX.

• Class can have state and lifecycle methods, while functional component cannot.

• Functional component is simpler and easier to read and test.

• Class can be extended and reused, while functional component cannot.

• Example of class component: class MyComponent extends React.Component {}

• Example of func...read more

React life cycle methods are functions that are called at different stages of a component's life cycle.

• Mounting: constructor(), render(), componentDidMount()

• Updating: render(), componentDidUpdate()

• Unmounting: componentWillUnmount()

• Error Handling: componentDidCatch()

• Examples: shouldComponentUpdate(), getDerivedStateFromProps()

Hooks are functions that allow you to use state and other React features in functional components. useMemo() is a hook that memoizes a function's result.

• Hooks are used in functional components to access state and lifecycle methods

• useMemo() is used to memoize a function's result to improve performance

• Example: const [count, setCount] = useState(0);

• Example: const memoizedValue = useMemo(() => computeExpensiveValue(a, b),

Higher order components are functions that take a component and return a new component with additional functionality.

• HOCs are used for code reuse, logic abstraction, and composition.

• They can be used for adding authentication, data fetching, or styling to a component.

• Examples include react-redux's connect function and react-router's withRouter function.

Arrow functions are a shorthand syntax for writing functions in JavaScript.

• Arrow functions have a concise syntax and do not bind their own 'this' keyword.

• They are commonly used in functional programming and with array methods like map, filter, and reduce.

• Arrow functions cannot be used as constructors and do not have a prototype property.

• They are also not suitable for methods that require the 'this' keyword to be bound

To bind events in React JS, use the 'on' prefix followed by the event name in camelCase.

• Use the 'on' prefix followed by the event name in camelCase (e.g. onClick, onSubmit)

• Pass a function as the event handler (e.g. onClick={() => console.log('Button clicked')})

• Bind 'this' to the event handler function if it uses 'this' (e.g. onClick={this.handleClick.bind(this)})

• Use arrow functions to automatically bind 'this' (e.g. on

I have used both Material UI and Bootstrap for styling.

• I have used Material UI for a project that required a more modern and sleek design.

• I have used Bootstrap for a project that required a more traditional and familiar design.

• Both frameworks have their strengths and weaknesses, and I choose the one that best fits the project's needs.

• I am also familiar with other styling frameworks such as Semantic UI and Foundation.

Virtual DOM is a lightweight copy of the actual DOM, used to improve performance by minimizing actual DOM manipulation.

• Virtual DOM is a concept used in ReactJS.

• It is a lightweight copy of the actual DOM.

• It is used to improve performance by minimizing actual DOM manipulation.

• When a change is made to the actual DOM, the Virtual DOM is updated.

• The Virtual DOM then calculates the difference between the previous and updated...read more