Add office photos
Filter interviews by
Veemo Reactjs Developer Interview Questions and Answers
Veemo Reactjs Developer Interview Experiences
1 interview found
Sumit Chinchole
(1 Question)
- Q1. Basic javascript question and react
Top trending discussions
Interview questions from similar companies
Saloni Ghag
I applied via Naukri.com and was interviewed in Dec 2024. There was 1 interview round.
(6 Questions)
- Q1. What is the difference between a development dependency and a regular dependency in software development?
- Ans.
Development dependencies are needed for development and testing, while regular dependencies are needed for the application to run.
Development dependencies are used during the development process, such as testing frameworks or build tools.
Regular dependencies are required for the application to function properly in production.
Development dependencies are typically listed in the devDependencies section of package.json, w...
- Q2. What do the symbols ^ and ~ represent in the package.json file?
- Ans.
Symbols ^ and ~ in package.json represent version ranges for dependencies.
The symbol ^ represents a range that allows minor version updates.
The symbol ~ represents a range that allows only patch updates.
For example, ^1.2.3 allows any version from 1.2.3 to <2.0.0, while ~1.2.3 allows any version from 1.2.3 to <1.3.0.
- Q3. How can a 404 page be handled in React routing?
- Ans.
404 page can be handled in React routing by creating a Route component with a path of '*' at the end of all other routes.
Create a Route component with a path of '*' at the end of all other routes in the Switch component.
Inside the '*' Route component, render a custom 404 page component.
Use the Switch component to ensure that only one Route is rendered at a time.
- Q4. Some Javascript coding questions.
- Q5. What is the component lifecycle in functional components?
- Ans.
Component lifecycle in functional components involves useEffect hook for side effects.
Functional components use useEffect hook to handle side effects like fetching data, subscribing to events, etc.
useEffect hook can be used to mimic componentDidMount, componentDidUpdate, and componentWillUnmount lifecycle methods.
useEffect hook takes a callback function as its first argument and an optional array of dependencies as its...
- Q6. Explain redux data flow
- Ans.
Redux data flow is a unidirectional flow of data in React applications using a centralized store.
Actions are dispatched to the store
Reducers update the state based on the action
Components subscribe to the store to access the updated state
Interview Preparation Tips
- Javascript
- React.Js
Anonymous
I applied via Recruitment Consulltant and was interviewed in Sep 2024. There was 1 interview round.
(16 Questions)
- Q1. What is hosting and closer
- Ans.
Hosting is the process of storing a website or application on a server, while closure is a function that retains access to variables from its parent scope.
Hosting involves storing a website or application on a server to make it accessible on the internet.
Closure is a function that retains access to variables from its parent scope, even after the parent function has finished executing.
- Q2. What is difference between var let and const give me an explanation on what block scope
- Ans.
var, let, and const are used to declare variables in JavaScript. var has function scope, let has block scope, and const is a constant with block scope.
var has function scope, meaning it is accessible throughout the function it is declared in.
let has block scope, meaning it is only accessible within the block it is declared in.
const is similar to let in terms of block scope, but the value cannot be reassigned.
- Q3. What is asynchronous and how it works
- Ans.
Asynchronous programming allows tasks to run independently of the main program flow, improving performance and responsiveness.
Asynchronous code does not block the main thread, allowing other tasks to continue while waiting for a response.
Callbacks, promises, and async/await are common ways to handle asynchronous operations in JavaScript.
Example: fetching data from an API while the rest of the application continues to r
- Q4. Tell me the output 1)a = 20; console.log(a); var a; 2)b=10; console.log(b); let b; 3)let a =5; if(a<5){ let b = " a lessthen 5"; }else{ let b = "b is grater then 5"; } console.log(b);
- Ans.
The output for the given code snippets will be: 1) 20 2) ReferenceError: Cannot access 'b' before initialization 3) ReferenceError: b is not defined
In the first snippet, variable 'a' is declared using 'var' after it is assigned a value, so it logs 20 without any issues.
In the second snippet, variable 'b' is declared using 'let' after it is assigned a value, so it throws a ReferenceError as 'b' is accessed before initia...
- Q5. Give a div with text and display center of the page and apply animation using HTML and css
- Ans.
Centered div with text and animation using HTML and CSS
Create a div element with text inside
Apply CSS styles to center the div on the page
Use CSS animations to add animation effects
- Q6. What are semantic tags and explain
- Ans.
Semantic tags are HTML tags that provide meaning to the content they enclose, helping search engines and screen readers understand the structure of a webpage.
Semantic tags help improve SEO by providing context to search engines.
They also improve accessibility for screen readers by clearly defining the structure of a webpage.
Examples of semantic tags include
,
- Q7. How can we write responsive for web page
- Ans.
Use media queries, flexible grids, and relative units to create a responsive web page.
Use media queries to apply different styles based on screen size
Create flexible grids using CSS Grid or Flexbox
Use relative units like percentages or ems for sizing elements
Consider using frameworks like Bootstrap or Material-UI for responsive design
Test your design on different devices and screen sizes
- Q8. What is the difference between CSS and SASS? what is the use of Sass
- Ans.
SASS is a preprocessor scripting language that is interpreted into CSS, offering more features and flexibility.
SASS is a preprocessor for CSS, allowing for variables, nesting, and mixins to be used in stylesheets.
SASS code needs to be compiled into CSS before being used in a web project.
SASS helps in writing cleaner and more organized CSS code, making it easier to maintain and update styles.
CSS is the styling language ...
- Q9. Event propagation
- Q10. How would you validate the form using HTML? How do you validate the phone number with the country code?
- Ans.
Form validation can be done using HTML attributes like required, pattern, and maxlength. Phone number validation with country code can be achieved using regex.
Use the 'required' attribute to make fields mandatory
Use the 'pattern' attribute with regex to validate input format
Use the 'maxlength' attribute to limit the number of characters in a field
For phone number validation with country code, use regex to match the des...
- Q11. Which test library you use why it usecase
- Ans.
I use Jest for testing React applications due to its simplicity and integration with React ecosystem.
Jest is the most popular test library for React applications
It comes pre-configured with Create React App and has great support for snapshot testing
Jest also has built-in mocking capabilities which make it easy to test components with dependencies
- Q12. Tell me mounting and shallow concept in testing library
- Ans.
Mounting is the process of rendering a component into the DOM, while shallow rendering allows testing a component without rendering its children.
Mounting is the initial phase of the component lifecycle where the component is rendered into the DOM.
Shallow rendering in testing library renders only the component itself, not its children.
Shallow rendering is useful for isolating the component being tested and avoiding rend...
- Q13. What is redux-toolkit and what difference b/w redux and redux-toolkit
- Ans.
Redux Toolkit is the official, recommended way to write Redux logic. It simplifies the process of managing state in React applications.
Redux Toolkit provides a set of tools and best practices to streamline Redux development.
It includes utilities like createSlice, createReducer, and configureStore to simplify the code and reduce boilerplate.
Redux Toolkit also includes built-in Immer integration for writing immutable upd...
- Q14. How api call handle in redux and how can you get and display user name from redux
- Ans.
API calls in Redux are typically handled using middleware like Redux Thunk. User name can be retrieved from Redux state and displayed in components.
Use Redux Thunk middleware to make API calls in Redux
Dispatch actions to update Redux state with API response data
Access user name from Redux state in components to display it
- Q15. React hooks and how optimization
- Q16. Why we need thank in redux
- Ans.
Thunk middleware in Redux allows for asynchronous logic to be handled in Redux actions.
Thunk middleware allows for dispatching functions instead of just plain objects in Redux actions.
It enables handling asynchronous API calls within Redux actions.
Thunk middleware helps in simplifying the code by moving complex logic outside of components.
Example: Thunk middleware can be used to dispatch an action after a delay or to f...
Skills evaluated in this interview
(2 Questions)
- Q1. React basic,event loop, Lazy Loading, Suspense, Javascript basics
- Q2. Create counter application
- Ans.
Counter application using Reactjs
Create a React component for the counter
Use state to keep track of the count
Implement functions to increment and decrement the count
Display the count on the screen
I applied via LinkedIn and was interviewed in Oct 2024. There was 1 interview round.
(3 Questions)
- Q1. What are the advantages of React
- Ans.
React offers advantages such as virtual DOM for improved performance, reusable components, and easy integration with other libraries.
Virtual DOM for efficient updates and improved performance
Reusable components for easier development and maintenance
Easy integration with other libraries like Redux for state management
Support for server-side rendering for better SEO performance
- Q2. How the performance optimization can be done in React Js Application
- Ans.
Performance optimization in React Js can be achieved through code splitting, memoization, virtualization, and minimizing re-renders.
Implement code splitting to load only necessary components when needed
Use memoization techniques like useMemo and useCallback to prevent unnecessary re-renders
Implement virtualization for long lists or tables to render only visible items
Minimize re-renders by using shouldComponentUpdate or
- Q3. What is the purpose of useMemo and UseCallBack hook
- Ans.
useMemo and useCallback are hooks in React used for optimizing performance by memoizing values and functions respectively.
useMemo is used to memoize the result of a function so that it is only recomputed when its dependencies change.
useCallback is used to memoize a function instance so that it is not recreated on every render unless its dependencies change.
Both hooks help in optimizing performance by preventing unneces...
Skills evaluated in this interview
anjali rastogi
(1 Question)
- Q1. What is client side and server side rendering
(2 Questions)
- Q1. Flat the array without using the inbuilt methods
- Ans.
Flatten an array without using inbuilt methods
Use recursion to iterate through the array and flatten it
Create a new array to store the flattened elements
Check if each element is an array, if so, recursively call the function to flatten it
- Q2. Sort the given objects based on the ages
(2 Questions)
- Q1. What do you mean by redux and how to use redux
- Ans.
Redux is a predictable state container for JavaScript apps. It helps manage the state of an application in a more organized way.
Redux is a state management tool commonly used with React to manage the state of an application.
It follows a unidirectional data flow, where the state is stored in a single store.
Actions are dispatched to update the state, and reducers specify how the state should change in response to actions...
- Q2. What is the use of Context Api in React
- Ans.
Context API is used in React to pass data through the component tree without having to pass props down manually at every level.
Avoids prop drilling by providing a way to share values like themes, user data, etc. across the component tree.
Helps in managing global state in React applications.
Context API consists of Provider and Consumer components to provide and consume the context data.
Can be used for theming, localizat
Skills evaluated in this interview
Niharika Thakur
I applied via Company Website and was interviewed in Jun 2024. There were 2 interview rounds.
Got a link on mail to give online clearance test. 25 questions on react, Js and html-css
(1 Question)
- Q1. Build a login page
Selected
I applied via Naukri.com and was interviewed before Aug 2023. There was 1 interview round.
(2 Questions)
- Q1. What is the difference between states and props ?
- Ans.
States are mutable data managed within a component, while props are immutable data passed from parent to child components.
States are managed within a component and can be changed using setState method
Props are passed from parent to child components and are immutable
States are used for internal component data management, while props are used for passing data between components
Example: A counter component may have a stat...
- Q2. How are data passed from children to parents in react component?
- Ans.
Data can be passed from children to parents in React components by using callback functions.
Use callback functions to pass data from child components to parent components
Parent component passes a function as a prop to child component
Child component calls the function with the data as an argument to pass data to parent component
Interview Preparation Tips
- React.Js
- HTML
- CSS
- Javascript
Skills evaluated in this interview
Veemo Interview FAQs
Tell us how to improve this page.
Interview Questions for Popular Designations
- React Js Frontend Developer Interview Questions
- React Native Developer Interview Questions
- React Developer Interview Questions
- Senior React Native Developer Interview Questions
- android and React Native Developer Interview Questions
- React Js Software Engineer Interview Questions
- Software Developer Interview Questions
- Java Developer Interview Questions
- Show more
Reactjs Developer Interview Questions from Similar Companies
TCS
Accenture
Wipro
Cognizant
- Home >
- Interviews >
- Veemo Interview Questions >
- Veemo Reactjs Developer Interview Questions
