Appstation Interview Questions and Answers

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

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

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

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

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

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

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

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

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

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.

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.