Accenture Junior Android Developer Interview Questions and Answers

Q1. Explain App Life Cycle
Ans. 
App Life Cycle refers to the sequence of events that occur from the time an app is launched until it is terminated.
• App is launched by user or system

• App enters foreground and becomes active

• App enters background when user switches to another app or locks the device

• App may be terminated by the system to free up resources

• App can be brought back to foreground by user or system events
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Q2. Extension of enum
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Extension of enum allows adding new cases, computed properties, and methods to an existing enum type.
• Extensions can be used to add new functionality to existing enum types without modifying their original implementation.

• New cases, computed properties, and methods can be added to an enum using extensions.

• Extensions can also be used to conform an enum to a protocol.
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Q3. Grand central dispatch
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Q4. Delegate methods of URL session
Ans. 
Delegate methods of URL session are used to handle various events during network requests.
• Delegate methods are used to handle authentication challenges, background session events, and data tasks.

• Examples include URLSessionDelegate, URLSessionDataDelegate, URLSessionTaskDelegate.

• Delegate methods can be used to handle redirects, caching policies, and response validation.
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Q5. SSL Pinning. How to achieve?
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SSL pinning is a security measure used to prevent man-in-the-middle attacks by validating the server's SSL certificate.
• Implement SSL pinning by embedding the server's SSL certificate within the app's code.

• During the SSL handshake, compare the server's certificate with the embedded certificate to ensure they match.

• If the certificates match, the connection is considered secure and the data exchange can proceed.

• SSL pinnin...read more
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Easy aptitude english and logical reasoning.

Q1. Tell me About yourself
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Q2. Swift advantages and disadvantages
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Swift is a powerful and modern programming language for iOS development, but it has its own set of advantages and disadvantages.
• Advantages: faster performance, safer code with optionals, easier to read and write code, interoperability with Objective-C

• Disadvantages: steep learning curve for beginners, limited community support compared to other languages like Java or Python
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Q1. Salary expectation and current salary
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Q1. Lifecycle of the Activity
Ans. 
The lifecycle of an Activity in Android refers to the series of states an Activity goes through from creation to destruction.
• An Activity goes through states like onCreate, onStart, onResume, onPause, onStop, onDestroy, etc.

• Each state has specific methods that can be overridden to perform actions at that state.

• For example, onCreate is called when the Activity is first created, onResume is called when the Activity is bro
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Q2. Push notification
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Q3. About the project mentioned in the resume
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Q1. Android Basics on mvvm architecture
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Q2. Navigation Component
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Q3. Jetpack components- work manager, viewmodel
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Q1. Managerial questions
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Q1. Difference between commit( ) and apply( ) in SharedPreferences?
Ans. 
commit() writes the changes synchronously, apply() writes the changes asynchronously.
• commit() returns a boolean value indicating success or failure, while apply() does not.

• commit() writes the changes immediately to the disk, while apply() writes the changes to the memory first and then to the disk asynchronously.

• apply() is faster than commit() as it writes the changes in the background thread.

• Use commit() when you need...read more
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Q2. Difference between Alpha and Beta testing?
Ans. 
Alpha testing is done by internal teams before release, while beta testing is done by external users after alpha testing.
• Alpha testing is done by internal teams to identify bugs and issues before releasing the software to the public.

• Beta testing is done by external users who are not part of the development team to gather feedback and identify any remaining issues.

• Alpha testing is usually done in a controlled environmen...read more
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Q3. What is Product Flavour?
Ans. 
Product Flavour is a feature in Android development that allows you to create different versions of your app with different configurations.
• Product Flavours are used to create different versions of an app for different purposes or target audiences.

• Each Product Flavour can have its own unique code, resources, and configurations.

• Product Flavours are defined in the build.gradle file of an Android project.

• Examples of Produc...read more
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Q4. Can we use Activity without XML?
Ans. 
Yes, we can use Activity without XML by programmatically creating the UI elements.
• Activities can be created and managed entirely in code without using XML layouts.

• UI elements can be added to the activity using Java code.

• This approach is useful for creating dynamic UIs or for cases where XML layouts are not suitable.
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Q5. Can we downgrade the app from PlayStore?
Ans. 
Yes, users can downgrade an app from PlayStore by uninstalling the current version and installing an older version manually.
• Users can uninstall the current version of the app from their device.

• They can then search for the older version of the app APK file online or use a backup they may have.

• After downloading the older version APK, they can manually install it on their device.
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Q1. Diff b/w diff and guard
Ans. 
diff is used to compare two collections and return the differences, while guard is used for early exit in a function if a condition is not met.
• diff is a method used in Swift to compare two collections and return the differences.

• guard is a keyword used in Swift to provide an early exit from a function if a condition is not met.

• Example: let array1 = [1, 2, 3, 4], array2 = [3, 4, 5, 6]; let result = array1.diff(array2) //...read more
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Q2. What is GCD and Multitreadung
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GCD stands for Grand Central Dispatch, a technology used in iOS for managing concurrent operations. Multithreading is the ability of a CPU to execute multiple threads concurrently.
• GCD is used for managing tasks asynchronously and efficiently utilizing system resources.

• Multithreading allows multiple tasks to run concurrently, improving performance and responsiveness of an application.

• Example: Using GCD to download image...read more
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Q1. How is you experience in your last companies?
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Q2. Lifecycle of activity and fragment
Ans. 
The lifecycle of an activity and fragment refers to the series of states they go through during their existence.
• Activities and fragments have similar lifecycle methods such as onCreate(), onStart(), onResume(), onPause(), onStop(), and onDestroy().

• The lifecycle of a fragment is tied to the lifecycle of its host activity, while an activity can exist independently.

• The lifecycle methods of an activity are called before th...read more
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Q3. Lazy and init meaning.
Ans. 
Lazy refers to delaying the execution of a task until it is actually needed. Init is short for initialization, which is the process of setting up an object or variable before it is used.
• Lazy loading is a common technique used in mobile app development to improve performance by only loading data when it is needed.

• Init methods are commonly used in object-oriented programming to set up an object's properties or variables ...read more
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Q4. How you learn Android.
Ans. 
I learned Android through online courses, documentation, and practice.
• To learn Android, I took online courses on platforms like Udemy and Coursera.

• I also read through the official Android documentation to gain a deeper understanding of the framework.

• Finally, I practiced building apps on my own and through tutorials to solidify my knowledge.

• I also participated in online communities like Stack Overflow to learn from othe
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Q5. About thread and how can we use
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Q6. Kotlin basic and scope
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Q1. How to share project to client.
Ans. 
The project can be shared with the client through various methods such as email, cloud storage, or version control systems.
• Create a build of the project

• Upload the build to a cloud storage service such as Dropbox or Google Drive

• Share the link to the build with the client

• Use a version control system such as Git to share the project with the client

• Provide instructions on how to build and run the project
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Q2. Project starting to end developer process
Ans. 
The developer process for a project involves planning, designing, coding, testing, and deployment.
• Plan the project and gather requirements

• Design the architecture and user interface

• Code the application using best practices and coding standards

• Test the application thoroughly to ensure quality and functionality

• Deploy the application to the desired platform and monitor its performance

• Continuously maintain and update the ap
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Q3. Scrum and agile methodologies
Ans. 
Scrum and agile methodologies are popular project management frameworks used in software development.
• Scrum is a subset of agile and focuses on iterative development with a fixed timeline called sprints.

• Agile emphasizes flexibility and collaboration between cross-functional teams.

• Both methodologies prioritize delivering working software frequently and responding to change.

• Examples of agile practices include daily stand-...read more
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Q4. Did you done any certification in Android?
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Q1. CCTC and ECTC, preferred location
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Q2. Why you want to join this company?
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Q3. Why you leave your current company?
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Q4. About all documents upload in ibegin portal
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Q1. All mandatory documents upload and verify
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Q1. Project structure that we are working, Android Unit testing
Ans. 
Android Unit testing is an essential part of project structure for ensuring code quality and functionality.
• Android Unit testing helps in identifying and fixing bugs early in the development process.

• It involves writing test cases to validate the behavior of individual units or components of an Android application.

• Unit tests can be written using frameworks like JUnit or Mockito.

• Test cases should cover different scenarios...read more
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