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j277 computer science paper1 - Coggle Diagram
j277 computer science paper1
topic 1.1 systems architecter
topic 1.3 network
memory and storig
ram and rom
Difference RAM ROM
Speed It is a high-speed memory. It is much slower than the RAM.
ROM stands for read-only memory. It's used to store the start-up instructions for a computer, also known as the firmware. Most modern computers use flash-based ROM. It is part of the BIOS chip, which is located on the motherboard.
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Comparison Chart.
Basis for Comparison RAM ROM
Stands for Random Access Memory Read Only Memory
Memory type Volatile Non-volatile
Memory capacity 1 to 256 GB per chip 4 to 8 MB per chip
Read-only memory (ROM) is a type of non-volatile memory used in computers and other electronic devices. Data stored in ROM cannot be electronically modified after the manufacture of the memory device.
topic 1.4 systems security
systems software
System software is software designed to provide a platform for other software. ... System software was usually supplied by the manufacturer of the computer hardware and was intended to be used by most or all users of that system. Many operating systems come pre-packaged with basic application software
Operating systems.
Device drivers.
Middleware.
Utility software.
Shells and windowing systems.
An embedded system is a small computer that forms part of a larger system, device or machine. It includes both hardware and software and its purpose is to control the device and to allow a user to interact with it. They tend to have one, or a limited number of tasks that they can perform.
central heating systems.
engine management systems in vehicles.
domestic appliances, such as dishwashers, TVs and digital phones.
digital watches.
electronic calculators.
GPS systems.
fitness trackers.
the cpu
CPU is considered as the brain of the computer. CPU performs all types of data processing
Dual-core CPU. ...
Quad-core CPU. ...
Hexa Core processors.
Performing arithmetical operations is not a task of the CPU because it does not do that formula of math, but that does not mean that CPU's are not suitable for calculating math. CPU's can only calculate basic math such as addition, subraction, multiplication and
he purpose of theCPU is to processdata . The CPU is where processes such as calculating, sorting and searching take place. .