Android Developer Trainee Interview Questions and Answers

MVVM Architecture is a design pattern that separates the user interface from the business logic and data model.

• Model - Represents the data and business logic

• View - Represents the UI components

• ViewModel - Acts as a mediator between the Model and View, handling communication and data binding

Fragments are modular sections of an activity's user interface that can be combined to create a multi-pane UI.

• Fragments allow for more modular and reusable UI components in Android development.

• They can be added, removed, replaced, and animated within an activity.

• Fragments are commonly used in creating responsive layouts for different screen sizes.

• Example: A news app may use a fragment for the list of articles and another fragment for displaying the selected article.

OOPs (Object-Oriented Programming) is a programming paradigm based on the concept of objects, which can contain data and code.

• OOPs focuses on creating reusable code by organizing data and behavior into objects.

• Key principles of OOPs include encapsulation, inheritance, and polymorphism.

• Encapsulation allows objects to hide their internal state and require interaction through defined interfaces.

• Inheritance enables a new class to inherit attributes and methods from an existing cl...read more