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bebo Technologies Reactjs Developer Interview Questions, Process, and Tips
bebo Technologies Reactjs Developer Interview Experiences
1 interview found
Anonymous
Selected
I applied via Recruitment Consulltant and was interviewed in Jul 2024. There were 3 interview rounds.
(6 Questions)
- Q1. What are promises ? D/W Promise.all and Promise.allSettled
- Q2. D/W let and var
- Q3. What are callback function ? Give disadvantages
- Ans.
Callback functions are functions passed as arguments to other functions to be executed later.
Used in event handling, asynchronous operations, and to achieve higher order functions
Disadvantages include callback hell, difficult to read and maintain code, and potential for memory leaks
Example: setTimeout function in JavaScript takes a callback function as an argument
- Q4. D/w useMemo and React.memo
- Q5. What is shadow DOM ?
- Ans.
Shadow DOM is a way to encapsulate the styling and structure of a web component, preventing styles from leaking out or clashing with the rest of the page.
Shadow DOM allows for creating self-contained components with their own DOM tree and styling.
It helps in preventing styles from the main document affecting the component and vice versa.
Shadow DOM can be created using the 'attachShadow' method in JavaScript.
Example:
- Q6. What is redux ? Explain its architecture ? How many parameters are there in connect method ?
- Ans.
Redux is a predictable state container for JavaScript apps. It helps manage application state in a single immutable store.
Redux is a state management library for JavaScript applications.
It follows a unidirectional data flow architecture.
Redux architecture consists of actions, reducers, store, and middleware.
Actions are payloads of information that send data from the application to the store.
Reducers specify how the app...
(5 Questions)
- Q1. Brief Introduction and projects that I have worked on
- Ans.
I am a Reactjs Developer with experience in building responsive web applications.
Developed a responsive e-commerce website using React, Redux, and Material-UI
Implemented authentication and authorization using Firebase in a social media application
Optimized performance by lazy loading components and code splitting
- Q2. What is CORS ?
- Ans.
CORS stands for Cross-Origin Resource Sharing, a security feature that allows servers to specify who can access their resources.
CORS is a security feature implemented by browsers to prevent unauthorized access to resources on a different origin.
It allows servers to specify which origins are allowed to access their resources using HTTP headers like Access-Control-Allow-Origin.
CORS is important for protecting sensitive d...
- Q3. How can you improve website performance ?
- Ans.
Improving website performance involves optimizing code, reducing server requests, and utilizing caching techniques.
Optimize code by removing unnecessary code, minifying and compressing files, and using efficient algorithms.
Reduce server requests by combining files, using asynchronous loading, and implementing lazy loading for images and videos.
Utilize caching techniques such as browser caching, server-side caching, and...
- Q4. What tools you have used in your previous organization
- Ans.
I have used tools like Git, Webpack, Babel, ESLint, and Redux in my previous organization.
Git for version control
Webpack for bundling
Babel for transpiling
ESLint for code linting
Redux for state management
- Q5. Why you are looking for a change ?
- Ans.
Seeking new challenges and opportunities for growth.
Looking for opportunities to work on more complex projects
Desire to learn new technologies and expand skill set
Seeking a more collaborative team environment
Want to advance career and take on more responsibilities
(1 Question)
- Q1. Salary Discussion
Interview Preparation Tips
If your basics are strong, you can easily clear it
Skills evaluated in this interview
Top trending discussions
Interview questions from similar companies
I applied via Naukri.com and was interviewed in Nov 2024. There was 1 interview round.
(4 Questions)
- Q1. What is difference between get props and set props
- Ans.
get props is used to retrieve the value of a property in React components, while set props is used to update the value of a property.
get props is used to access the value of a property passed down from a parent component
set props is used to update the value of a property in the current component
Example: get props - accessing the 'name' prop in a child component: this.props.name
Example: set props - updating the 'count' ...
- Q2. What is difference between get for each and map
- Ans.
get forEach is used to iterate over elements in an array without returning a new array, while map creates a new array by applying a function to each element.
forEach does not return a new array, while map returns a new array with the results of applying a function to each element
forEach is used for side effects, while map is used for transforming data
forEach does not return anything, while map returns a new array
Example...
- Q3. Difference between put and patch
- Ans.
PUT is used to update or replace an entire resource, while PATCH is used to update or modify part of a resource.
PUT is idempotent, meaning multiple identical requests will have the same effect as a single request.
PATCH is not necessarily idempotent, as multiple identical requests may have different effects.
PUT requires the client to send the entire updated resource, while PATCH only requires the client to send the spec...
- Q4. Difference between local storage session storage
- Ans.
Local storage is persistent and stays until manually cleared, while session storage is temporary and cleared when the browser is closed.
Local storage data persists even after closing the browser
Session storage data is cleared when the browser is closed
Both store data as key-value pairs similar to cookies
I applied via Naukri.com and was interviewed in Oct 2024. There were 2 interview rounds.
(3 Questions)
- Q1. Basic react interview question like lifecycle methods and about hooks
- Q2. Javascript interview questions like hoisting, closures, function currying and es6 features.
- Q3. Function to flatten and sort an array
(3 Questions)
- Q1. Basic scrum related questions
- Q2. Challenges faced
- Q3. Function to find the occurrences of the word in a string
I applied via Referral and was interviewed in Aug 2024. There were 2 interview rounds.
(3 Questions)
- Q1. Small Javascript coding questions
- Q2. Basic html and css questions
- Q3. Questions about last companies project
(2 Questions)
- Q1. JS coding questions, output based questions
- Q2. 2 html questions
Interview Preparation Tips
Selected
(2 Questions)
- Q1. Basics of Javascript
- Q2. Basics of React
Interview Preparation Tips
I applied via Recruitment Consulltant and was interviewed in May 2024. There were 2 interview rounds.
They asked hacker rank test
(2 Questions)
- Q1. Routing concept
- Q2. React js coding question
Interview Preparation Tips
Harsh Khandelwal
Dsa question were asked
Question related to profit loss
I applied via Naukri.com and was interviewed in Jun 2024. There was 1 interview round.
Hacker earth test with 29 MCQs and 1 Coding Question
Interview Preparation Tips
I applied via Naukri.com and was interviewed in Aug 2023. There was 1 interview round.
(1 Question)
- Q1. Basic reactjs Questions with some javascript coding snippets
(4 Questions)
- Q1. What are hooks in reactjs?
- Ans.
Hooks are a new feature in React 16.8 that allow you to use state and other React features without writing a class.
Hooks are functions that let you use state and other React features in functional components.
They allow you to reuse stateful logic without changing your component hierarchy.
Some built-in hooks include useState, useEffect, useContext, etc.
Hooks provide a more direct API to the React concepts you already kn...
- Q2. What is pure component?
- Ans.
Pure component is a class component that does not re-render if the input props and state remain the same.
Pure components implement shouldComponentUpdate method with shallow prop and state comparison.
They are optimized for performance as they prevent unnecessary re-renders.
Example: class MyComponent extends React.PureComponent { // component code here }
- Q3. What is modules in javascript?
- Ans.
Modules in JavaScript are reusable pieces of code that can be exported from one file and imported into another.
Modules help in organizing code into separate files for better maintainability.
Modules can be imported using 'import' keyword and exported using 'export' keyword.
Modules can be used to encapsulate code and prevent global namespace pollution.
CommonJS and ES6 modules are two popular module systems in JavaScript.
- Q4. What is the difference between rem and em in css? How to hide something in CSS?
- Ans.
rem and em are both units in CSS for defining font sizes, with rem being relative to the root element and em being relative to the parent element.
rem stands for 'root em' and is relative to the font size of the root element (usually the tag)
em stands for 'element em' and is relative to the font size of the parent element
To hide something in CSS, you can use the display property with a value of 'none' or the visibility...
Interview Preparation Tips
- HTML
- CSS
- Javascript
- Github
- React.Js
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bebo Technologies Reactjs Developer Interview Process
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