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Computer Science:!!: - Coggle Diagram
Computer Science:!!:
Operating System
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The common functions of a OS is: Providing a UI, Manages memory and peripheral and handles multitasking.
Memory Management is one of the main duties of the OS. This well... manages the memory, by moving it back between main and disk memory.
Multitasking is when you have multiple programs or pieces of software open at the same time. This gives the processor a time slice for each task
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General Netwoks
WAN (Wide Area Network)
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The owner of the Wide Area Network use existing network infrastructure to connect the sites together
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Types of Storage
Secondary Storage
This is non-volatile, meaning it keeps all the data and software when the machine is turned off. So without Secondary Storage, all the software and data will be lost the moment the machine is turned off
Some examples of Secondary Storage are: Hard Disk, CD, DVD, Flash Drive and SSD
Secondary Storage is long term storage of data files, software or OS. This is memory that is stored externally to the computer.
Primary Storage
Primary Storage is anything on the motherboard. This temporarily holds applications and data currently in use.
Some examples of primary storage include: RAM, ROM, Cache and Flash Memory. RAM is non-volatile, so it keeps its contents even when the machine us turned off.
Types of Memory
Optical: Optical memory is any storage type that data is written and read with a laser. The laser creates marks in a pattern on the disk. The laser detects where the marks are and translate this into a readable form.
Solid State: Solid state memory stores data permanently inside an integrated circuit, typically using flash memory. The flash memory inside an it means data is written, transferred, and erased electronically and silently. Solid state has no moving parts found inside mechanical hard-disk drives.
Magnetic: Magnetic storage stores data on a magnetized medium. Magnetic storage uses different patterns of magnetisation in a magnetizable material to store data. Magnetic memory is non-volatile.
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Fetch-Execute Cycle
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Execute - The speed of executing is influenced by the complexity of the instruction and the computer's processing power.
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