Computer Science Paper 1 - created from Mind Map

Página 1

Binary and Hexadecimal

Communication and Internet Technologies

Logic Gates and Logic Circuits

Operating Systems and Computer Architecture

Input and Output devices

Data Storage

High-level/ low-level languages

Security and Ethics

Key definitions

Denary Number system based on the number 10

Binary: Number system based on the number 2

Hexadecimal: Number system based on the number 5. Used for memory dumps, HTML, MAC address, web address and assembly/machine code

BInary Shift

Key Definitions

Simplex: Data transmission in one direction only

Full-Duplex: Data transmission in two direction at same time

Half-Duplex: Data transmission in two-direction but not at the same time

Transmition

Serial: Data is sent one bit at a time over a single wire or channel

Parrallel:: Several bits of data are sent down several different wires or channels at the same time. (e.g. byte of data is sent down 8 wires/channels)

Asynchronous: Data being transmitted in an agreed bit pattern

Synchronous: a continueous stream of data which is accopanied by timing signals generated by an internal clock

Key definitions

Logic gates

Logic Circuit

Truth tables

Key definitions

Buffer: A buffer is a temporary memory are in a device

Computer Architecture: How a computer is designed

Buses: They move data around the computer and also send out control signals to synchronise the internal operations

Register: High-speed storage areas within the computer

Memory unit: Made up of addresses and contents

Control unit: Controls the operation of the memory, processor and input/output devices

Interrupt: An interrupt is a signal sent from a device(or from same software) to the processor requesting its attention

Operating Systems: THe software running in the background of a computer system. It manages many of the basic functions

Key definitions

Input devices

Input devices

Output devices

3D Scanners

Barcode Readers

QR codes

2D scanners

Digital cameras

Key definitions

MIDI

MP3

MP4

JPEG

Lossless

Lossy

Primary Memory

Secondary Memory