OLX Senior Android Developer Interview Questions and Answers

Q1. Spiral Matrix Leetcode
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Q2. Basic Kotlin , Java questions & basic Android related to service , recycler view & viewmodel
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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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Q1. MVVM architecture
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Q2. Draw architecture design pattern
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MVC (Model-View-Controller) architecture design pattern separates an application into three main components.
• Model: Represents the data and business logic of the application

• View: Represents the UI components of the application

• Controller: Acts as an intermediary between Model and View, handling user input and updating the Model accordingly
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Q1. Asked about my current work
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Q1. What is the maximum bundle size?
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The maximum bundle size for Android apps is 150 MB.
• The maximum bundle size for Android App Bundles is 150 MB.

• This includes the size of the base module and all dynamic feature modules.

• If the app exceeds this size, it may not be able to be installed on devices with limited storage.
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Q2. Lifecycle of views
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Views in Android have a lifecycle that includes creation, starting, pausing, resuming, stopping, and destroying.
• Views are created when the layout is inflated or added programmatically.

• Views start when they become visible on the screen.

• Views pause when they lose focus but are still visible.

• Views resume when they regain focus.

• Views stop when they are no longer visible on the screen.

• Views are destroyed when the activity i...read more
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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

Medium question on hashmap

Q1. Design question which checks oops concept and data structure
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