i
ValueLabs
Filter interviews by
I applied via Naukri.com and was interviewed in Mar 2021. There was 1 interview round.
To connect a component to Redux store, we use the connect function from the react-redux library.
Import the connect function from react-redux.
Use the connect function to wrap the component and connect it to the Redux store.
The connect function takes two parameters: mapStateToProps and mapDispatchToProps.
mapStateToProps is a function that maps the state from the Redux store to the component's props.
mapDispatchToProps is ...
Context API is a way to share data between components without passing props down manually.
Context API provides a way to pass data through the component tree without having to pass props down manually at every level.
It is useful for sharing data that needs to be accessed by many components at different levels of the tree.
Initial state can be set in Context API using the createContext() function.
There is no need to have ...
Yes, it is mandatory for Reducer to have an initial state.
Initial state defines the starting point of the state tree.
It helps in defining the shape of the state tree.
It is used to set default values for the state properties.
It is also used to reset the state to its initial values.
Example: const initialState = { count: 0 };
Example: const initialState = { name: '', age: 0 };
Minimum coverage for an app and code pushed to production/master branch while deployment.
Minimum coverage for an app depends on the project requirements and complexity.
Generally, a coverage of 80% or higher is considered good.
Code pushed to production/master branch should be thoroughly tested and reviewed.
Continuous integration and deployment can help automate this process.
Examples of tools for code coverage include Je
React re-renders just the part of the page that has changed, thanks to its virtual DOM.
React uses a virtual DOM to track changes in the UI.
When a component's state or props change, React compares the virtual DOM with the real DOM and updates only the necessary parts.
This approach improves performance by minimizing the number of DOM manipulations.
React's diffing algorithm efficiently determines the minimal set of change
Service Workers are scripts that run in the background and can intercept network requests, cache or modify responses.
Offline support for web applications
Push notifications
Background synchronization
Reduced network usage and faster page loads
Progressive Web Apps (PWA)
Redux-Saga is a middleware for Redux that handles side effects. Actions can be dispatched from components using mapDispatchToProps.
Redux-Saga is used to handle side effects like API calls and asynchronous actions.
It uses generator functions to make asynchronous code look synchronous.
Sagas listen for specific actions and perform tasks based on those actions.
To dispatch actions from components, use mapDispatchToProps to ...
Top trending discussions
I applied via Recruitment Consultant and was interviewed in Aug 2020. There were 5 interview rounds.
Microservices are a software architecture pattern where applications are built as a collection of small, loosely coupled services.
Microservices allow for modular development and deployment of applications.
Each microservice can be developed, deployed, and scaled independently.
Microservices communicate with each other through APIs.
They promote flexibility, scalability, and fault tolerance.
Examples of microservices includ
I applied via Naukri.com and was interviewed in Feb 2021. There were 5 interview rounds.
I applied via Naukri.com and was interviewed in Oct 2020. There were 3 interview rounds.
posted on 29 Jun 2022
I applied via LinkedIn and was interviewed before Jun 2021. There were 2 interview rounds.
I applied via Naukri.com and was interviewed before Mar 2021. There were 2 interview rounds.
I applied via Naukri.com and was interviewed before Oct 2020. There were 3 interview rounds.
I applied via Job Portal and was interviewed in Apr 2021. There was 1 interview round.
Data warehouse is a central repository of data used for reporting and analysis.
Data is extracted from various sources and transformed to fit into the warehouse schema.
Data is organized into dimensions and facts for efficient querying.
Used for business intelligence and decision-making.
In my current project, we use a data warehouse to store and analyze customer behavior data.
We extract data from our website, mobile app, ...
I applied via Naukri.com and was interviewed before Feb 2021. There was 1 interview round.
I applied via Approached by Company and was interviewed in Aug 2024. There were 2 interview rounds.
Design a weather app using Android architecture components.
Use MVVM architecture pattern for separation of concerns
Implement LiveData for real-time data updates
Utilize Room database for offline data storage
Integrate Retrofit for network calls to fetch weather data
Use ViewModel to manage UI-related data in a lifecycle-conscious way
Some of the top questions asked at the ValueLabs React Developer interview -
Senior Software Engineer
2.1k
salaries
| ₹6.7 L/yr - ₹25 L/yr |
Software Engineer
816
salaries
| ₹7.6 L/yr - ₹14.4 L/yr |
Analyst
516
salaries
| ₹8.3 L/yr - ₹30.6 L/yr |
Technical Lead
473
salaries
| ₹11.6 L/yr - ₹40 L/yr |
Senior Analyst
399
salaries
| ₹11.3 L/yr - ₹35.4 L/yr |
Mphasis
eClerx
L&T Technology Services
Coforge