Adobe Senior Android Developer Interview Questions and Answers

Write a program to print first and last letters of words alternatively from am list

Q1. Explain oops concept and it's pillars
Ans. 
OOPs stands for Object-Oriented Programming. It is based on four main pillars: Inheritance, Encapsulation, Abstraction, and Polymorphism.
• Inheritance: Allows a class to inherit properties and behavior from another class. Example: class B extends class A.

• Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: using private access modifiers to restrict access to certain data.

• Abstract...read more
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Q2. Android architecture , thread v/s coroutine
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Q1. Mostly they focus on java , oops concept. Rather than Android related questions
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Q2. Prepare basics of oops well
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Q1. Reverse the items in the array with highest values skip the lowest
Ans. 
Reverse items in array with highest values, skipping the lowest
• Sort the array in descending order

• Skip the lowest value(s)

• Reverse the remaining items
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Q2. Kotlin coroutines
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Q3. Java interface and abstract class difference
Ans. 
Java interface defines a contract for classes to implement, while abstract class provides common functionality for subclasses.
• Interface can only have abstract methods, while abstract class can have both abstract and non-abstract methods.

• A class can implement multiple interfaces but can only extend one abstract class.

• Interfaces are used to achieve multiple inheritance in Java, while abstract classes are used to provide ...read more
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Q4. MVVM Pattern in android
Ans. 
MVVM is a design pattern used in Android development to separate the UI logic from the business logic.
• MVVM stands for Model-View-ViewModel

• Model represents the data and business logic

• View is the UI component that displays the data

• ViewModel acts as a mediator between the Model and View, handling the UI logic and data manipulation

• MVVM helps in maintaining a clean and organized codebase
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Q1. What is high order function?
Ans. 
A high order function is a function that can take other functions as parameters or return functions as results.
• High order functions can be used to create more flexible and reusable code.

• They allow for functions to be passed as arguments, making code more modular.

• Examples include map, filter, and reduce functions in functional programming.
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Q2. What is most efficient layout to use on android
Ans. 
ConstraintLayout is the most efficient layout to use on Android.
• Allows for flat view hierarchy

• Handles complex layouts efficiently

• Supports responsive design

• Provides tools for optimizing layouts
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Q1. View Model Scope for activity or fragment
Ans. 
View Model Scope determines whether a ViewModel should be scoped to an activity or a fragment.
• View Model scoped to activity: shared between all fragments within the activity

• View Model scoped to fragment: specific to that fragment only

• Use activity scope for data shared across fragments, fragment scope for fragment-specific data
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Q1. Architecture pattern
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Q2. Kotlin advance
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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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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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