Tecno Mobile Mobile Developer Interview Questions and Answers

Q1. Software type, physical activity,
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Q2. Introduction, display type,spare part
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Q3. Customer service, customer satisfaction
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Q4. Computer operator
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Q5. Team management
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Q1. Coroutines , types, implement the coroutines
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Q2. Kotlin, oops, enum vs sealed
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It was given over a phone call and the case study was to identify pluggable devices on wifi and verify them if they can be communicatable. If yes, then we have to draw a flowchart and explain end to end connectivity.

Q1. I am a mobile technician
Ans. I can do any problem and mobile repairing technician
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Q2. CPU also done I'm
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Q3. 5 years experience on mobile technician
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It was DSA questions

Q1. Broken touch and glass changing
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Q1. Mobile repairing hardware problems solve
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Q1. What is Android Framework?
Ans. 
Android Framework is a set of APIs and tools provided by Android to develop applications for Android devices.
• It provides a set of pre-built components for building mobile applications.

• It includes libraries for UI design, data storage, networking, and more.

• Developers can use Android Framework to create apps for smartphones, tablets, wearables, and other devices.

• Examples of Android Framework components include Activities...read more
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Q2. What do you know about MVVM ?
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MVVM stands for Model-View-ViewModel, an architectural pattern used in software development.
• MVVM separates the user interface from the business logic and data access layers.

• Model represents the data and business logic, View represents the UI, and ViewModel acts as a mediator between the two.

• ViewModel exposes data and commands to the View, and communicates with the Model to retrieve and save data.

• MVVM is commonly used i...read more
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Q3. Explain Room Persistence Library.
Ans. 
Room is an abstraction layer over SQLite to allow for more robust database access while harnessing the full power of SQLite.
• Room is a part of Android Architecture Components.

• It provides compile-time verification of SQL queries.

• It simplifies database operations by eliminating boilerplate code.

• It supports LiveData and RxJava for reactive programming.

• It allows for easy migration of database schema.

• It provides a clean API ...read more
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Q4. Write a Builder class.
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A Builder class is used to create objects with a large number of optional parameters.
• Builder class is a creational design pattern.

• It separates the construction of a complex object from its representation.

• It allows you to create different variations of an object while avoiding constructor pollution.

• It has a fluent interface that allows you to chain method calls together.

• Example: StringBuilder in Java.
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Q5. Kotlin - letinit, val, var, extension function, data class.
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Q6. Explain - Coroutin, RxJava
Ans. 
Coroutines and RxJava are both used for asynchronous programming in Android development.
• Coroutines are a lightweight solution for asynchronous programming that allow for easy cancellation and error handling.

• RxJava is a reactive programming library that uses Observables and Observers to handle asynchronous events.

• Both Coroutines and RxJava can be used to simplify complex asynchronous code and improve app performance.

• Cor...read more
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Q7. What are SOLID principles in OOP languages?
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SOLID principles are a set of five design principles that help in creating maintainable and scalable software applications.
• S - Single Responsibility Principle (SRP)

• O - Open-Closed Principle (OCP)

• L - Liskov Substitution Principle (LSP)

• I - Interface Segregation Principle (ISP)

• D - Dependency Inversion Principle (DIP)
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