Google Android Developer Interview Questions and Answers

Q1. Basic HR Discussion
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Q1. About Android, Kotlin, Activity Fragments Services Notifications Workmanager OOPS Easy DSA etc.
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Q1. Salary discussion
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Q1. Structs vs Classes
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Structs are value types and passed by value, while classes are reference types and passed by reference.
• Structs are used for small, simple data types like coordinates or colors.

• Classes are used for more complex data types that require inheritance or reference semantics.

• Structs are copied when passed around, while classes are passed by reference.

• Structs are stack allocated, while classes are heap allocated.
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Q2. Discussion about design patterns
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Q3. OOPS discussion
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Q4. Concurrency discussion
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Data structure - tree and linkedlist questions asked, binary search tree

Q1. Java multithreading
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Q2. Write code for synchronise threads
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Synchronizing threads in Android can be achieved using synchronization blocks or methods.
• Use synchronized keyword to create a synchronized block or method

• Use locks such as ReentrantLock for more complex synchronization needs

• Consider using synchronized collections like ConcurrentHashMap for thread-safe data structures
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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. Android Memory Leaks
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Q2. Android architecture
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Q3. Kotlin basics questions
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Q1. Questions related to kotlin coroutines in depth questions, scenario based questions
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Q2. Solid principles
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Q3. Architecture patterns
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Q4. Kotlin coroutine
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Q5. Unit testing, espresso scenario based
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Q1. Desing pattern and ui testing
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Q2. Design pattern and coding
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Q3. Make api flow and create with help of design pattern for ui and ux testing
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The answer to the question is provided below.
• To create an API flow, start by identifying the endpoints and their functionalities.

• Design the UI and UX testing by using appropriate design patterns like MVC or MVVM.

• Implement the API calls and handle the responses using networking libraries like Alamofire.

• Use XCTest or UI Testing frameworks for automated UI and UX testing.

• Mock the API responses for testing purposes using t...read more
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