Android Interview preparation

  Elaborate your approach in integrating a third party API into your project? My approach is to treat any 3rd-party API as a 'black box' that we don't trust. I wrap it behind an interface to decouple it from our business logic, use Mappers to control the data flow, and implement strict error-handling policies like exponential backoff to ensure the app remains stable even if the service goes down. 1. Evaluation and Research - Documentation & Support, License & Security, Performance Impact 2. Architectural Integration (The "Wrapper" Pattern) - Abstraction Layer 3. Implementation Strategy - Dependency Injection, Concurrency, Data Transformation 4. Robustness and Resilience - Error Handling, Retry Mechanisms, Caching & Offline Support 5. Monitoring and Observability - Logging & Analytics, Health Checks What is a singleton pattern and how singleton declared in Kotlin? The Singleton Pattern is a creational design pattern that ensures a class ha...

Entry Level  Here are the important questions which are definitely asked during an Android App developer entry level interview.  Major components of the Android App:  Activities  Services  Content Providers  Intents  Broadcast Receivers  Widgets  Notifications  Views  Fragments  Resources  App APK files  Layout XML Files Fragment in Android:  The fragment in Android is as follows:  Fragments can be added or removed in an activity while the activity is running. A fragment has its own layout and behavior with its own life cycle callbacks. Multiple fragments can be combined in a single activity to build a multi-pane UI. The fragment life cycle is closely related to the life cycle of its host activity which means when the activity is paused, all the fragments available in the activity will also be paused.              Storage options available in  Android:   Some stor...

Most Relevant Android Interview questions to watch out Here is the list of most common questions asked during an Android Interviews for Android developer profile. Therefore, if you are preparing for Android Interviews, then this article is a must for you. All these questions are based on my real Interview experiences. Keep on following/visiting this post as I will be updating these Questions & Answers a on regular basis. Q: Activity lifecycle in Android A:  An android application will undergo various states that are associatively called as Android Activity Life Cycle. The lifecycle of an activity consists of 7 methods: - 1.  onCreate()  - The function onCreate() is called when a user first opens an activity that acts the same as a constructor of a class.  The callback function is required as the basic setup for the application is done in the created state like, associate the activity with the ViewModel or to bind data to the UI, etc. 2.  onStart() ...

  I had prepared a list of most common questions asked during Kotlin Android Interviews for Android developer profile. Therefore, if you are preparing for Android Interviews, then this article is a must for you. Question: What are the visibility modifiers in Kotlin? A visibility modifier or access specifier also called as access modifier is a concept that is used to define the scope of something in a programming language. In Kotlin, we have four visibility modifiers: private : visible inside that particular class or file containing the declaration. protected : visible inside that particular class or file and also in the subclass of that particular class where it is declared. internal : visible everywhere in that particular module. public : visible to everyone. Note: By default, the visibility modifier in Kotlin is public . Question: What are the types of constructors in Kotlin? Constructors in Kotlin are of two types: Primary  — These are defined in the class headers. They can...