Robosoft Senior Android Developer Interview Questions and Answers

Q1. Asked me to develop an android app with weather forecast (use dependency injection)
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Q2. Develop weather forecast app
Ans. 
Develop a weather forecast app for Android platform.
• Utilize APIs like OpenWeatherMap for real-time weather data

• Include features like current weather, hourly forecast, and 7-day forecast

• Implement location-based weather updates

• Design user-friendly interface with intuitive navigation

• Incorporate push notifications for weather alerts
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Q1. Lazy vs latinit
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lazy vs lateinit are both used in Kotlin to delay the initialization of variables, but lazy is for val properties and lateinit is for var properties.
• lazy is a property delegate that initializes the value only upon first access

• lateinit is used for var properties that are guaranteed to be initialized before accessing them

• lazy can be used for properties that are computationally expensive to initialize, while lateinit is u...read more
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Q2. Hashmap vs hashtable
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Hashtable is synchronized and slower, while hashmap is not synchronized and faster.
• Hashtable is synchronized, while hashmap is not.

• Hashtable does not allow null keys or values, while hashmap allows one null key and multiple null values.

• Hashtable is thread-safe, while hashmap is not.

• Hashtable is slower than hashmap due to synchronization.

• Example: Hashtable ht = new Hashtable(); HashMap hm = new HashMap();
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Q1. Basic questions related to opps, kotlin and some scenario based question
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The first round is Hackerrank two algo and one UI test very easy, Second is Fundamentals of JS and React Native one must have a deep understanding of JS to do that I strongly suggest going through Akashay Saini's JS series It'll help and the Third is PS/DS asked some basic A&DS questions can be solved easily with little practice on Leetcode

The whole interview about DSA, oops database and your relevant text

There is two interview around L1 and L2 L1 is about data structure and algorithm and oops. Concept in L2 interview is about all tach stack and resume Q&A, Ask about react, redux, Python DSA, oops, SQL

Q1. When we are use interface and abstract class in Android
Ans. 
Interfaces and abstract classes are used in Android to achieve abstraction, modularity, and code reusability.
• Interfaces are used to define a contract that classes must implement, allowing for polymorphism and loose coupling.

• Abstract classes provide a base implementation for subclasses, allowing for code reuse and providing common functionality.

• Interfaces are commonly used for event handling, callbacks, and defining con...read more
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Q1. Access Specifier
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