Interview Questions and Answers

Functional components are stateless and return UI elements based on input props, while non-functional components have state and can change UI based on user interaction.

• Functional components are simpler and easier to test than non-functional components.

• Non-functional components can have state and lifecycle methods, while functional components cannot.

• Examples of functional components include buttons, labels, and icons, while examples of non-functional components include forms, ...read more

Sqlite database can be implemented in React Native using 'react-native-sqlite-storage' package.

• Install 'react-native-sqlite-storage' package using npm.

• Import SQLite from 'react-native-sqlite-storage'.

• Create a database using SQLite.openDatabase() method.

• Execute SQL queries using executeSql() method.

• Close the database connection using close() method.

Push notifications can be implemented in Android and iOS using Firebase Cloud Messaging (FCM) and Apple Push Notification service (APNs) respectively.

• For Android, integrate FCM SDK in the app and use FCM console to send notifications.

• For iOS, create an APNs certificate, configure the app to receive notifications, and use APNs to send notifications.

• Both platforms require handling of notification payload in the app to display the notification to the user.

• FCM supports additional...read more

I used React Native for my last app.

• Developed UI components using React Native

• Integrated APIs to fetch and display data

• Implemented Redux for state management

• Used Firebase for authentication and database

• Optimized app performance using React Native Debugger

Generator functions are functions that can be paused and resumed, allowing for lazy evaluation of data.

• Generator functions use the yield keyword to pause execution and return a value.

• They can be used to generate an infinite sequence of values.

• They are memory efficient as they only generate values when needed.

• Example: function* myGenerator() { yield 1; yield 2; yield 3; }

• Example: const infiniteGenerator = function*() { let i = 0; while (true) { yield i++; } }

SEO stands for Search Engine Optimization, which involves optimizing websites to improve their visibility on search engines.

• SEO involves optimizing website content, meta tags, and backlinks to improve search engine rankings.

• Some common SEO tools include Google Analytics, SEMrush, Moz, and Ahrefs.

• Keyword research tools like Google Keyword Planner and SEMrush help identify relevant keywords for content optimization.

• SEO plugins like Yoast SEO for WordPress help optimize on-page ...read more

Sales is crucial for driving revenue and growth in a business.

• Sales directly impacts the bottom line of a company by generating revenue.

• It helps in acquiring new customers and retaining existing ones.

• Sales is essential for scaling a business and achieving growth targets.

• Effective sales strategies can differentiate a company from its competitors.

• Sales professionals play a key role in building relationships and trust with customers.