Operating System Online Course

Online Operating Systems Course

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An Operating System exploits the hardware equipment with a number of processors to provide a set of services to program users. An Operating System also manages secondary memory and input/output products with respect to its users.

Structural Elements Of A Computer

1. Processor : Controls the computation of the machine and its Data Processing functions. A single processor is often termed as the Central Processing Unit.
2. Main Memory : Stores data and programs. This module is typically unstable. Contents of this memory are not preserved even when the computer is shut down.
3. I/O Modules : Moves data between the computer and its external environment, such as disks, data communication equipments, and terminals.
4. System Bus : Provides for communication between processors, principal memory, and I/O modules.

Schematic Diagram Of A Computer System

• INPUT: Input devices (Keyboard, Mouse etc.) (RAW MATERIALS)
• OUTPUT: Output devices (VDU, Printers etc. ) (FINISHED PRODUCTS)
• MEMORY: Main memory (Volatile – commonly known as RAM) (GODOWN / INVENTORY)
• CONTROL UNIT: A device that generates Signals to command other units that what to do and what not to. (TOP MANAGEMENT)
• ALU: Arithmetic Logic Unit – The unit that performs the computations. (MACHINES)

Topics Include

• Operating systems design and implementation
• Basic structure
• Synchronization and communication mechanisms
• Implementation of processes, process management, scheduling, and protection
• Memory organization and management, including virtual memory
• I/O device management, secondary storage, and file systems
• Understand the purpose of the operating system,
• Distinguish between a resource, a program, and a process,
• Recognize critical resources and explain the behavior of semaphores,
• Describe various memory page replacement algorithms, and
• Describe how files are stored in secondary storage.

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