CA Monk Interview Questions and Answers

Q1. What is usestate and use effect?
Ans. 
useState and useEffect are hooks in React for managing state and side effects in functional components.
• useState is a hook that allows functional components to have stateful logic.

• useEffect is a hook that allows functional components to perform side effects.

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

• useEffect example: useEffect(() => { console.log('Component mounted'); }, []);
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Q2. Create a todo application in front of him
Ans. 
Created a todo application using React Js
• Used React components to create the UI

• Implemented state management for adding, deleting, and updating todos

• Utilized local storage to persist todo data

• Styled the application using CSS or a CSS framework
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General discussion on random topic

Q1. Candidate profile discussion
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Q1. The final round with CEO
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Q1. What Is ReactJs?
Ans. 
ReactJs is a JavaScript library for building user interfaces.
• ReactJs is developed and maintained by Facebook.

• It uses a component-based architecture for building reusable UI components.

• ReactJs uses a virtual DOM for efficient rendering of components.

• It allows developers to create interactive and dynamic web applications.

• ReactJs can be used with other libraries and frameworks like Redux for state management.
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Q2. What are the Features of React JS?
Ans. 
React JS is a popular JavaScript library for building user interfaces.
• Component-based architecture

• Virtual DOM for efficient updates

• JSX syntax for writing components

• One-way data binding

• Reusable components

• React Native for mobile app development
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Q3. What Is UseEffect and UseState Hooks?
Ans. 
UseEffect and UseState are React hooks used for managing state and side effects in functional components.
• UseEffect is used to perform side effects in functional components, similar to componentDidMount and componentDidUpdate in class components.

• UseState is used to manage state in functional components, allowing for re-rendering when the state changes.

• Example: const [count, setCount] = useState(0); useEffect(() => { doc...read more
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Q4. Do you use Redux Toolkit?
Ans. 
Yes, I use Redux Toolkit for state management in my frontend projects.
• I use Redux Toolkit to simplify the process of managing state in my applications.

• It provides a set of tools and best practices for managing state in a predictable way.

• I find it helpful for handling complex state logic and data flow in my projects.
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Q5. What is the Redux Toolkit?
Ans. 
Redux Toolkit is an official, opinionated, batteries-included toolset for efficient Redux development.
• Official toolset for Redux

• Opinionated and batteries-included

• Helps with common Redux tasks like store setup, reducer logic, and actions
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Q6. What is Reducer?
Ans. 
Reducer is a function in Redux that specifies how the application's state changes in response to actions.
• Reducer functions take the current state and an action as arguments, and return the new state.

• Reducers are pure functions, meaning they do not modify the current state, but return a new state object.

• Redux uses reducers to manage the state of the application in a predictable way.
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Q7. What is createSlice?
Ans. 
createSlice is a function in Redux Toolkit that simplifies the process of creating Redux slices.
• createSlice is a function provided by Redux Toolkit for creating Redux slices with less boilerplate code.

• It allows developers to define a slice of the Redux state, including initial state, reducers, and action creators.

• createSlice automatically generates action types and action creators based on the defined reducers.

• It is co...read more
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Q8. What are the props and state?
Ans. 
Props and state are two important concepts in React for managing and passing data.
• Props are read-only data passed from a parent component to a child component.

• State is mutable data managed within a component.

• Props are used to pass data down the component tree, while state is used for managing data within a component.

• Props are passed as attributes in JSX, while state is managed using setState method.

• Example: props are u...read more
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Q9. Can we send the state from the child component to the parent component?
Ans. 
Yes, we can send the state from a child component to a parent component in React.
• Use callback functions to pass data from child to parent

• Parent component can pass a function as a prop to child component

• Child component can call this function with the data to update parent's state
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Q10. What is React Query? Have you used it in any of your projects?
Ans. 
React Query is a library for managing server state in React applications.
• React Query is used for fetching, caching, synchronizing and updating server state in React applications.

• It provides hooks like useQuery and useMutation to interact with server data.

• React Query helps in handling loading, error and stale data states efficiently.

• Example: const { data, isLoading, isError } = useQuery('todos', fetchTodos)
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Q11. Why is React Query used?
Ans. 
React Query is used for managing server state and caching data in React applications.
• Provides a powerful and flexible way to fetch, cache, and update data from APIs

• Automatically handles caching, background refetching, and stale data management

• Improves performance by reducing unnecessary network requests

• Simplifies data fetching and updating logic in React components
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Q12. Difference between useQuery and useMutation.
Ans. 
useQuery is for fetching data from the server, useMutation is for making changes to the server data.
• useQuery is used for fetching data from the server, while useMutation is used for making changes to the server data.

• useQuery is read-only and does not modify data on the server, while useMutation is used for updating, creating, or deleting data on the server.

• useQuery is typically used for GET requests, while useMutation ...read more
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Q13. Do you use Material UI? If Yes then ready to answer few questions on Material UI.
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Q14. As part of the interview, I gave you 10 to 15 minutes to make a "To-Do" Application in React Js.
Ans. 
A simple To-Do application built with React to manage tasks efficiently.
• Use functional components and hooks like useState for state management.

• Create an input field to add new tasks, e.g., <input type='text' />.

• Display tasks in a list using the map function, e.g., {tasks.map(task => <li>{task}</li>)}.

• Implement a delete function to remove tasks, e.g., const deleteTask = (index) => { ... }.

• Style t...read more
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Q15. Can we make a custom hook? How can we make custom hooks and what purpose?
Ans. 
Yes, custom hooks are reusable functions in React that allow you to extract component logic into separate functions.
• Custom hooks are created by prefixing the function name with 'use' and can be used to share logic between components.

• They can be used to manage state, side effects, and other features in functional components.

• For example, a custom hook can be created to fetch data from an API and handle loading and error ...read more
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Questions answers regarding hiring

Q1. Why Talent Acquisition Boolean Software
Ans. 
Talent Acquisition is crucial for finding and attracting the right talent to drive organizational success.
• Talent Acquisition helps identify and hire top performers

• It ensures a diverse and inclusive workforce

• Effective Talent Acquisition reduces turnover and improves employee retention

• It plays a key role in employer branding and reputation

• Talent Acquisition helps align talent with organizational goals and culture
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