Photon Interactive Interview Questions, Process, and Tips

Q1. Create custom framework
Ans. 
Creating a custom framework involves organizing code into reusable components for easier development and maintenance.
• Identify common functionalities that can be abstracted into separate modules

• Create a new Xcode project and select 'Framework' as the template

• Add your code files, resources, and dependencies to the framework project

• Build the framework to generate a .framework file that can be imported into other projects
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Q2. Certificate pinning and custom notifications
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Q1. Tell me about your self
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I am a dedicated QA Engineer with 5 years of experience in testing web and mobile applications.
• Experienced in manual and automated testing

• Proficient in using testing tools such as Selenium and Jira

• Strong attention to detail and problem-solving skills

• Collaborative team player with excellent communication skills
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Q2. Explain defect life cycle
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Defect life cycle is the process of identifying, reporting, fixing, retesting, and closing defects in software development.
• Defect identification: Defects are identified through testing, code reviews, or user feedback.

• Defect reporting: Once a defect is identified, it is reported in a defect tracking system with details like steps to reproduce, severity, and priority.

• Defect fixing: Developers analyze and fix the reported...read more
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Q1. Past experience
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Q2. Python related questions
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Create a software for food order & delivery, need to provide solutions for a customer facing tough situation. list out item to create luxury apparel website .

Q1. About technical details about BA
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Q2. Check about domain knowledge
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Q1. Explain about MVVM
Ans. 
MVVM is an architectural pattern used in software development, particularly in Android apps, to separate the user interface from the business logic.
• MVVM stands for Model-View-ViewModel

• Model represents the data and business logic

• View is the UI component that displays the data and interacts with the user

• ViewModel acts as a mediator between the Model and View, handling user interactions and updating the Model

• MVVM helps in...read more
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Q2. Kotlin scope function
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Q3. Sealed claa in kotlin
Ans. 
Sealed classes in Kotlin are used to represent restricted class hierarchies.
• Sealed classes can have a limited set of subclasses defined within the same file.

• They are useful for representing a fixed set of types in a hierarchy.

• Sealed classes are often used in when expressions for exhaustive checks.
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Q4. Extension function in kotlin
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Extension functions in Kotlin allow you to add new functions to existing classes without modifying their source code.
• Extension functions are defined outside of the class they extend.

• They can be called on instances of the class as if they were regular methods.

• They can access the properties and methods of the class they extend.

• Example: fun String.isEmailValid(): Boolean { ... }

• Example: fun Int.isEven(): Boolean { ... }
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Q5. Null safety in kotlin
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Null safety in Kotlin ensures that variables cannot hold null values unless explicitly specified.
• Kotlin uses nullable and non-nullable types to enforce null safety.

• The '?' operator is used to declare a variable as nullable.

• Safe call operator '?.' is used to safely access properties or methods of nullable objects.

• The '!!' operator is used for force unwrapping nullable types, but can lead to NullPointerExceptions.
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Q6. Room data base explanation
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Room database is a persistence library that provides an abstraction layer over SQLite to allow for more robust database access while harnessing the full power of SQLite.
• Room database simplifies database interactions by providing compile-time verification of SQL queries.

• It consists of three main components: Entity, DAO (Data Access Object), and Database.

• Entities represent tables in the database, DAOs define methods to i...read more
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Q7. Find the vowels in a string and convert that into upper case
Ans. 
Convert vowels in a string to uppercase
• Iterate through each character in the string

• Check if the character is a vowel (a, e, i, o, u)

• If it is a vowel, convert it to uppercase
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Q8. Explain about jet compose
Ans. 
Jet Compose is a modern UI toolkit for building native Android apps using a declarative approach.
• Jet Compose is a declarative UI framework for building Android apps.

• It allows developers to create UI components using Kotlin code.

• Jet Compose simplifies UI development by eliminating the need for XML layouts.

• It provides a more flexible and efficient way to create dynamic UIs.

• Jet Compose is part of the Jetpack libraries pro
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Q1. Custom painting widget
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Q2. Web sockets implementation
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Q3. Bloc Architecture
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Q4. Pagination in Flutter
Ans. 
Pagination in Flutter allows for efficient loading of large data sets by fetching and displaying data in chunks.
• Use ListView.builder with a custom itemBuilder function to dynamically load data as the user scrolls.

• Implement a pagination logic to fetch more data when the user reaches the end of the current data set.

• Update the ListView with the new data and continue the process until all data is loaded.

• Consider using pack...read more
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Q5. Adding and customising voice over (accessibility) support to Flutter app
Ans. 
To add voice over (accessibility) support to a Flutter app, use the accessibility features provided by Flutter and customize them as needed.
• Use Semantics widget to add accessibility labels and actions to widgets in the app

• Customize the voice over experience by providing specific instructions and descriptions for each widget

• Test the accessibility features using a screen reader to ensure they work as intended
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Bloc Architecture and implementation