Update README.md (#2)

Added 3 solution

Author: vatsalkesarwani12

README.md

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-# Android-Interview-Question
+# Android-Interview-Question
+
+Hello Android Devs,
+This repository contains a number of android interview questions that can be used for reference. We are creating this list because we want to have a repository, where we can prepare for android job interview. In all answers you can find the links with the source of the answer, where you may read more detailed information on the question.
+
+[![License](https://img.shields.io/badge/License-MIT-green.svg)](https://github.com/mastermind-tech/Android-Interview-Question/blob/master/LICENSE)
+![Open Source Love](https://badges.frapsoft.com/os/v2/open-source.svg?v=103)
+
+## Topic
+### Garbage Collection
+1. **How does Garbage Collection work on Android?**
+[Answer](https://medium.com/android-news/garbage-collection-explained-for-android-developers-and-any-other-jvm-language-ac5896bc8875)
+2. **Explain the terms reference counting, mark and sweep?**
+[Answer](https://www.geeksforgeeks.org/mark-and-sweep-garbage-collection-algorithm/)
+
+### Touch Event
+1. **Explain in complete detail on when you tap on a position/coordinate on phone say (140, 250), to the types of listeners fired, their priority on execution and event handling mechanism between child and parent layouts.**
+[Answer](https://blog.mindorks.com/touch-control-and-events-in-android)