Photon Technologies Senior Android Developer Interview Questions and Answers

Normal MCQ questions reasoning, java related and programs outputs

Difference between abstract classes and interfaces, Array sort time complexity

Q1. Questions related to koltin
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Q2. Jetpack compose uses
Ans. 
Jetpack Compose is a modern Android UI toolkit that simplifies and accelerates UI development.
• Declarative UI: Jetpack Compose allows developers to build UI using a declarative programming model.

• State management: Jetpack Compose handles state management efficiently, making it easier to update UI based on data changes.

• Compose functions: Developers can create reusable UI components using Compose functions.

• Interoperability...read more
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Q3. Difference between remember and rememberSaveable
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remember is used to store a value in a composable function, while rememberSaveable is used to store a value that survives configuration changes.
• remember is used to store a value that does not survive configuration changes

• rememberSaveable is used to store a value that survives configuration changes, such as rotation of the device

• rememberSaveable is typically used for storing view model data in Jetpack Compose
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Q4. Coroutines parallel and sequential processing
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Q1. How do you handle the multiple view in Recyclerview?
Ans. 
Multiple views in RecyclerView can be handled by using different view types and view holders.
• Use getItemViewType() method to return different view types based on position

• Create multiple view holders for each view type

• Bind data to each view holder based on its type

• Example: Creating a chat app with different message types like text, image, and video
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Q1. What is UI thread?
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UI thread is the main thread in Android responsible for handling user interface interactions.
• UI thread is also known as the main thread in Android.

• It is responsible for handling user interface interactions such as drawing views, handling touch events, and updating UI components.

• Performing long-running tasks on the UI thread can lead to UI freezes and unresponsiveness.

• To perform background tasks and prevent blocking the...read more
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Q1. React native hooks
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Q2. Component architecture
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Q1. Javascript programs
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Q2. Coding
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Q1. Basic ios development questions
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Q2. Core data or any other data base
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Q1. Basics of Android
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Q1. Technical implementation
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Q1. Company fit culture test
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Q1. Basic questions related to opps, kotlin and some scenario based question
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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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