BYJU'S IOS Developer Interview Questions and Answers

Asked questions about DSA and the time complexity of the solved question.

Q1. Activity lifecycle, Fragment lifecycle
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Q2. Process for communicating with two fragment
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Q1. Recent projects
Ans. 
Developed a mobile application for tracking daily water intake and hydration levels.
• Implemented user-friendly interface for inputting water intake

• Integrated notifications for reminding users to drink water

• Utilized database to store and track hydration data
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Q2. Technologies worked with
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Experienced with technologies such as Java, Swift, React Native, and Firebase for mobile app development.
• Java

• Swift

• React Native

• Firebase
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Q3. Analytics tools used
Ans. 
Google Analytics, Firebase Analytics, Mixpanel
• Google Analytics for tracking user behavior

• Firebase Analytics for app performance monitoring

• Mixpanel for in-depth user analytics
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Q4. Error monitoring tools and sentry related
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Q5. Redux vs local storage
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Redux is a state management library for JavaScript applications, while local storage is a browser feature for storing data locally.
• Redux is used for managing the global state of an application, making it easier to access and update data across components.

• Local storage is used for storing data locally on the user's device, allowing for persistent data even after the browser is closed.

• Redux is typically used for more com...read more
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Q6. Caching in react native
Ans. 
Caching in React Native allows for storing data locally to improve app performance and reduce network requests.
• Use AsyncStorage for simple key-value pair caching in React Native.

• Implement caching strategies like cache expiration or cache invalidation to manage cached data effectively.

• Consider using libraries like redux-persist for more advanced caching capabilities in React Native.
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Q1. What is DispatchQueue ?
Ans. 
DispatchQueue is a class in iOS that manages the execution of tasks serially or concurrently on the main or background threads.
• DispatchQueue is used to manage the execution of tasks asynchronously.

• It can be used to run tasks on the main thread or on a background thread.

• Tasks can be dispatched synchronously or asynchronously.

• Example: DispatchQueue.main.async { // code to run on the main thread }
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Q2. What is Url-session ?
Ans. 
URLSession is a class in iOS that allows you to make network requests and handle responses.
• URLSession is used to create tasks for downloading/uploading data, downloading/uploading files, and streaming data.

• It provides built-in support for authentication, cookies, and caching.

• You can customize URLSession configurations to control things like timeouts, caching policies, and connection limits.
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Asked questions about DSA and the time complexity of the solved question.

Q1. Event bus, DS question,
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Q1. Discuss about the salary
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