Tech Mahindra Senior Android Developer Interview Questions and Answers

Q1. Data class in kotlin
Ans. 
Data class in Kotlin is used to represent a simple data container with automatically generated methods like equals(), hashCode(), toString(), and copy().
• Data classes are declared using the 'data' keyword before the class keyword.

• Properties of data classes are automatically generated component functions for destructuring declarations.

• Data classes cannot be abstract, open, sealed, or inner.

• Example: data class User(val na
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Q2. Scope functions
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Q3. Explain viewmodel and mvvm
Ans. 
ViewModel is a class that stores and manages UI-related data in a lifecycle-conscious way. MVVM is an architectural pattern that separates the UI from the business logic.
• ViewModel is part of the Android Architecture Components and is used to store and manage UI-related data in a lifecycle-conscious way.

• ViewModel survives configuration changes such as screen rotations and retains its data.

• MVVM stands for Model-View-View...read more
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Q4. Higher order functions
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Q1. Solid principles, core java,kotlin
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Q2. Mvvm,mvp,mvc,flows
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Q3. State flow shared flow
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Q4. Builder pattern
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Q1. Technical scenarios
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Q2. Java coding,data structures
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Q3. Algo,complex views,compose
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Q1. How do you handle the multiple view in Recyclerview?
Ans. 
Multiple views in RecyclerView can be handled by using different view types and view holders.
• Use getItemViewType() method to return different view types based on position

• Create multiple view holders for each view type

• Bind data to each view holder based on its type

• Example: Creating a chat app with different message types like text, image, and video
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Q1. What is UI thread?
Ans. 
UI thread is the main thread in Android responsible for handling user interface interactions.
• UI thread is also known as the main thread in Android.

• It is responsible for handling user interface interactions such as drawing views, handling touch events, and updating UI components.

• Performing long-running tasks on the UI thread can lead to UI freezes and unresponsiveness.

• To perform background tasks and prevent blocking the...read more
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Q1. What is marker interface
Ans. 
Marker interface is an interface with no methods, used to mark a class for special treatment.
• Marker interfaces are used to provide metadata about the class.

• They do not have any methods to implement.

• Examples include Serializable interface in Java.
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Q1. What is fragment
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A fragment is a modular section of an activity that has its own lifecycle, layout, and behavior.
• Fragments are reusable components that can be combined to create a multi-pane UI.

• They can be added or removed from an activity dynamically.

• Fragments have their own lifecycle methods such as onCreate, onCreateView, and onDestroyView.
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The question about prblm solving

Any presentation or pdf to submit it at any topic or else to explain it

The discussion with my team mate

Basic Array programs

Q1. MVVM Architecture
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Q2. Dependency Injection
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Q1. HR will ask general questions about your technical and education details
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Q1. Basic Android questions Basic Java questions Basic OOPs questions Questions on Android framework, jetpack, database and XML Questions on kotlin
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Q1. Salary and work nature discussion
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