Sensen Networks Android Developer Interview Questions and Answers

Q1. Lazy vs latinit
Ans. 
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
Ans. 
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. Activities lifestyle
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Q2. Compose kotlin
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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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The first round consisted of a coding exercise along with fundamental questions related to React Native, JavaScript, and inquiries about objects and arrays.

Q1. Native modules, useRef, Flatlist
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Find distinct island, check if balanced parenthesis

Create a GitHub repo Application and maintain orientation change with selection.

Q1. Sliding window question, sorting. Android questions.
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Q1. Binary tree bottom view.
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Q1. Activities lifestyle
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Q2. Compose kotlin
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