Unit Outcomes

Q1. Differentiate between various Mobile Operating Systems and the language used for Android Application Development.
Q2. Explain the Components of the Android Application.
Q3. Install Java Development Kit (JDK), Android Studio, and the Necessary Tools.
Q4. Demonstrate the creation of Android Application.
Q5. Describe the Directory Structure of an Android Application.

Definition - Operating System

An Operating System is an Essential part of the Computer System.
It Consists of a set of programs that are executed when the Machine is turned on.
It also Manages the resources effectively depending on the user's request.
Operating System is System Software that manages the computer's Hardware and provides an Environment for Running Programs.
An Operating System is loaded into Memory when the computer is Booted and remains active as long as the Machine is on.
It acts as a Resource Manager.
It Keeps Track of the Status of each Resource and decides who will have control over the computer resource for how long and when.
The operating system acts as an Interface between the User and the Machine.

Tasks of an Operating System
Primary Memory Management
Secondary Memory Management
I/O System Management
File Management.
Process Management

The OS Manages and Handles the Competing Processes running in the Main Memory.
It decides which process should get the Memory, when and for how long.
During Execution, it moves the processes back and forth between the main memory and the Disk.
It also keeps the track of every Memory Location irrespective of whether the Memory location is Allocated or Unallocated.

Secondary Memory is Non-Volatile, which means it stores data even if the computer is turned off or until the data is Deleted or Overwritten.
The Operating System keeps track of the available space on the disk and allocates it properly to the programs being stored on it.
The activities of secondary memory management are storage allocation, disk scheduling, and free-space management.

I/O System Management
The task of this module is to Keep track of the status of different devices connected to the computer.
Also, it allocates