Biofourmis Senior Android Developer Interview Questions and Answers

Q1. Tell me about the Services
Ans. 
Services in Android are components that run in the background to perform long-running operations.
• Services can be used to perform tasks that should continue even when the app is not in the foreground.

• There are two types of services: started services and bound services.

• Started services are started with startService() method and run independently of the app's lifecycle.

• Bound services are started with bindService() method ...read more
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Q2. Basic android questions
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Q1. How would you create a live-data like behaviour
Ans. 
To create a live-data like behavior, you can use LiveData or RxJava for reactive programming.
• Use LiveData from Android Architecture Components to observe changes in data and update UI accordingly

• Implement RxJava for reactive programming to handle asynchronous data streams and update UI in real-time

• Use WebSocket for real-time communication between client and server to push updates instantly
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Q2. DSA problem - dp
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Q1. Questions on past experience
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1 hr.....array and linked list

Create a project to downlaod and show images

Kotlin conceptual code

Q1. Android SDK and Concepts
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Q1. Good and responsive
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Q1. What is failable initialisers
Ans. 
Failable initialisers are initialisers that can return nil instead of an instance of the class.
• Failable initialisers are denoted by placing a question mark after the init keyword.

• They are commonly used to handle invalid input or to fail gracefully.

• Example: init?(name: String) { if name.isEmpty { return nil } }

• Failable initialisers can be used with optional binding to safely unwrap the returned instance.
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Q2. Swift Basics and learning
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There were few MCQ questions based on android and 2 coding questions

Q1. Purely DSA round it was. There were 3 coding question asked and I was able to solve all of that.
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Q2. All questions from leetcode coding question (easy- medium).
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Q1. In this round, the interviewer was very weird, he asked some questions related to the internal working of JSON & restApis technologies. He was not supportive and made me feel like I`m nothing in front of ...read more
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