Zummit Infolabs Android Developer Intern Interview Questions and Answers

Q1. Briefly explain about your self and work experience
Ans. 
I am a Senior Android Developer with 5+ years of experience in developing mobile applications for various industries.
• Developed and maintained multiple Android applications from concept to deployment

• Proficient in Java, Kotlin, and Android SDK

• Experience with RESTful APIs, third-party libraries, and version control systems like Git

• Strong problem-solving skills and ability to work in a team environment

• Familiar with Agile d
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Q2. What is Higher order function
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Higher order function is a function that can take other functions as parameters or return functions as results.
• Higher order functions can be passed as arguments to other functions.

• Higher order functions can return functions as results.

• Examples include map, filter, and reduce functions in functional programming.
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Q3. What is inline keyword
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The inline keyword is used in Kotlin to suggest that a function should be inlined at the call site.
• Used to eliminate the overhead of function calls by copying the function code directly at the call site

• Helps in improving performance by reducing the function call overhead

• Should be used for small functions or lambdas to avoid unnecessary function call overhead
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Q1. Explain the Agail methodology
Ans. 
Agile methodology is a project management approach that emphasizes flexibility, collaboration, and iterative development.
• Agile methodology focuses on delivering working software in short, iterative cycles called sprints.

• It values customer collaboration and responding to change over following a strict plan.

• Key principles include individuals and interactions over processes and tools, working software over comprehensive d...read more
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Q2. How do you handle the Team during your team lead experience
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Q1. What is intent?
Ans. 
Intent is a messaging object used to request an action from another app component.
• Intent is used to start activities, services, and broadcast receivers in Android.

• It can also be used to pass data between components.

• There are two types of intents: explicit intents and implicit intents.

• Explicit intents specify the component to start by name.

• Implicit intents specify the action to perform and let the system find the approp
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Q2. What is work manager?
Ans. 
Work Manager is an Android Jetpack library used for managing deferrable, asynchronous tasks.
• Work Manager is part of the Android Jetpack library.

• It is used for managing deferrable, asynchronous tasks that need to run even if the app is in the background.

• Work Manager provides various constraints and options for scheduling tasks, such as network availability, charging status, and more.

• It is recommended for tasks that are ...read more
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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. All technical Jetpack concept no DSA questions and asked all theoretical questions
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Q2. What are coroutine, how to secure ur app data, network call in android , ssl pinning, notification's implementation through FCM, android basic questions
Ans. 
Coroutines are a way to perform asynchronous operations in Android, securing app data involves encryption, SSL pinning enhances security, FCM for notifications.
• Coroutines are used for managing asynchronous operations in Android, allowing for efficient and non-blocking code execution.

• Securing app data involves using encryption techniques such as AES to protect sensitive information from unauthorized access.

• SSL pinning i...read more
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Q1. Basic technical knowledge question
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Q2. Android related questions
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Q1. Communication skill
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Q2. Salary regarding questions
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Coding project on my previous company

Q1. Coding project on my previous company
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Q2. Name project on my previous employer
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Q1. Android Activity LifeCycel
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Q2. Android Fragment Life Cycle. The interviewer asked me which life cycle methods get triggered in different scenarios.
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Q3. Higher Order and Lambda Functions in Kotlin
Ans. 
Higher Order and Lambda Functions in Kotlin
• Higher order functions are functions that take other functions as parameters or return functions

• Lambda functions are anonymous functions that can be used as arguments or return values in higher order functions

• They provide a concise way to write code and enable functional programming in Kotlin
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Q4. Kotlin OOPS concepts - Classes, Objects inheritance, Polymorphism, Encapsulation, Abstraction, Interfaces, Visibility Modifiers, Companion Object, Object Expression, Object Declaration
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Q5. Intents, Intent Filter, Broadcast Recievers, Push Notifications
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Q6. Unit Testing and UI Testing
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Q7. Multi Modular Project structure
Ans. 
Multi Modular Project structure is an architectural approach that divides an application into multiple modules for better organization and scalability.
• Divide the application into separate modules based on functionality or features.

• Each module should have its own set of code, resources, and dependencies.

• Modules can communicate with each other through defined interfaces or APIs.

• Modularization helps in code reusability, e...read more
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Q8. MVVM architecture, VM advantages, Livedata
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Q9. Multi Threading, Coroutines
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Q10. Dependency Injection
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Q11. Showed me Some Kotlin codes and ask me to explain those codes and tell the output
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Q12. Null Pointer Prevention and Type safety in kotlin
Ans. 
Null pointer prevention and type safety in Kotlin
• Kotlin uses nullable and non-nullable types to prevent null pointer exceptions

• The safe call operator '?' can be used to safely access nullable variables

• The '!!' operator can be used to explicitly throw a null pointer exception

• Kotlin's type system ensures type safety by checking types at compile-time
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Q13. Scope functions
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Q1. Just basic details like current salary, expectation, Notice Period, Location Preferences
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Q1. This was basically salary negotiation round
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