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
- Processor : Controls the computation of the machine and its Data Processing functions. A single processor is often termed as the Central Processing Unit.
- 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.
- I/O Modules : Moves data between the computer and its external environment, such as disks, data communication equipments, and terminals.
- 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)
- 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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