AWS Architecture Study Guide

Structure of Android OS  Android operating system consist of several layers, which are staring from bottom to top Linux Kernel : Takes care of threading, memory management, process management, hardware drivers, networking and security. Includes drivers for camera, audio, keypad, bluetooth, etc. Hardware Abstraction Layer HAL - Exposes hardware capabilities of hardware components such as Bluetooth, Camera etc to the Kotlin API through standard interfaces. When device is needed, the Kotlin API makes a call to the interface and a corresponding library is loaded for the hardware component. Android Runtime ART - Environment used to run the applications. Each application runs in its own process. Designed based on Java Virtual Machine to run apps in shared environment, where battery, CPU, memory are limited. Reads .dex files. Native C/C++ Libraries - Used to build core Android components such as ART and HAL.Their functionalities are exposed by Java Framework API Java API Framework - Set o...