Bharat Sevak Samaj Android Developer Interview Questions and Answers

Basic interview on question like aptitude, javascript, typescript and react-native question

Q1. Basic javascript question in second round
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Q2. What is function currying
Ans. 
Function currying is a technique in functional programming where a function with multiple arguments is transformed into a sequence of nested functions, each taking a single argument.
• Currying allows you to partially apply a function by fixing a number of arguments, which creates a new function.

• It helps in creating reusable functions and improves code readability.

• Example: const add = (a) => (b) => a + b; const add5 = add
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Q3. What is IIEF where we can use it
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IIFE stands for Immediately Invoked Function Expression, used for creating a function that is executed immediately after it is defined.
• IIFE is used to create a private scope for variables to avoid polluting the global scope.

• It is commonly used in React Native development to encapsulate code and prevent naming conflicts.

• Example: (function() { console.log('IIFE executed'); })();
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Q4. Deeply they ask me closure related question how it's working
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Q5. How call call stack and event loop is working
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Call stack is used to keep track of function calls, while event loop manages asynchronous operations in JavaScript.
• Call stack is a data structure that keeps track of function calls in a program.

• When a function is called, it is added to the top of the call stack. When the function completes, it is removed from the stack.

• Event loop is responsible for managing asynchronous operations in JavaScript, ensuring that they are ...read more
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Q1. Project related discussion only
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Q1. Android and kotlin related basic questions
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Q2. Kotlin scope functions
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Q1. System design round
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Q1. Cultural round with past projects
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Q1. Explain the concept of multithreading and how is it differ from multiprocessing
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Multithreading allows multiple threads to exist within the context of a single process, while multiprocessing involves multiple processes running concurrently.
• Multithreading allows multiple threads to share the same memory space and resources of a single process, while multiprocessing involves separate memory space for each process.

• Multithreading is more lightweight and efficient compared to multiprocessing as threads ...read more
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Q1. Recent projects
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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
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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
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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. Problem Solving, Data Structure round, 2 questions.
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Q1. Domain specific round
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Q1. Questions based on your previous projects.
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Q1. Salary discussion and joining date confirmation
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Q1. Activity lifecycle, Fragment lifecycle
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Q2. Process for communicating with two fragment
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Normal MCQ questions reasoning, java related and programs outputs

Difference between abstract classes and interfaces, Array sort time complexity

It was okayish not too hard or not to easy

Q1. What is AV Foundation, and how does it function?
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