ExcelSoft Technologies Android Developer Trainee Interview Questions and Answers

Q1. Explain MVVM Architecture
Ans. 
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
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Q2. Explain Fragments
Ans. 
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 anoth
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Q3. Explaon OOPs Concept
Ans. 
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 c...read more
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Coding test was about finding the largest 2 and smallest 2 numbers in given array without using any sorting algorithm. You can write this in any preferred language. and duration was about 1 hour.

Q1. Where do I live?
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Q2. What's the expected Salary
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