Unit Outcomes

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• 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

Primary Memory 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 Management

• 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

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