Arche Softronix Android Developer Interview Questions and Answers

Q1. Basic questions from Swift
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Q1. Explain about protocol extensions
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Protocol extensions in iOS allow adding functionality to existing protocols without modifying the original protocol definition.
• Protocol extensions can provide default implementations for protocol methods.

• They can also add new methods and properties to conforming types.

• Protocol extensions are useful for adding common functionality to multiple types that conform to a protocol.

• Example: extending the Equatable protocol to ...read more
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Q2. Difference between merge and rebase
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Merge combines changes from different branches, while rebase moves the entire branch to a new base commit.
• Merge creates a new commit to combine changes, while rebase rewrites commit history.

• Merge preserves the commit history of all branches, while rebase creates a linear history.

• Merge is non-destructive and keeps the original branch intact, while rebase modifies the branch being rebased.

• Example: 'git merge feature-bran
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Q3. Explain about Protocol equitability
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Protocol equitability ensures that all participants in a communication protocol have equal access and opportunity to send and receive data.
• Ensures fair and equal treatment of all participants in a communication protocol

• Prevents any participant from having an unfair advantage or disadvantage

• Promotes transparency and inclusivity in communication protocols
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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. Struct vs class
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Structs are value types and classes are reference types in Swift.
• Structs are passed by value, while classes are passed by reference.

• Structs are copied when assigned to a new variable, while classes point to the same instance.

• Use structs for simple data types and classes for more complex objects.

• Example: struct Point { var x: Int, y: Int } vs class Person { var name: String, age: Int }
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Q2. Optional chaining
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Q1. Introduction about myself
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Q2. Why do I want to switch Job
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Q1. Asked deep concept of react and js.
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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. What is the difference between interface and abstract class?
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Interface defines only method signatures while abstract class can have both method signatures and implementations.
• An interface can be implemented by multiple classes while a class can only extend one abstract class.

• An abstract class can have constructors while an interface cannot.

• An abstract class can have non-abstract methods while an interface can only have abstract methods.

• An abstract class can have instance variabl...read more
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Q2. What is singleton class?
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A singleton class is a class that can only have one instance created at a time.
• Singleton classes are often used for managing resources that should only have one instance, such as a database connection or a configuration file.

• They are implemented by making the constructor private and providing a static method to access the single instance.

• Singleton classes can also implement interfaces and inherit from other classes.

• Exa...read more
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Q1. Java basics questions
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Q2. Android basics questions
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