Noa's Business Class Flashcards
Test Study
what is a computer?
a computer is an electronic device that processes, stores and retrieves data.
what do computer systems need to have?
Computer systems must have hardware and software
what are the 4 functions of a computer?
- Input
- Processing
- output
- storage
what is hardware?
Hardwear is all physical devices that make up a computer system
where can hardware devices be?
They can be inside a computer case or connected to the case via cables
what do hardware devices that are inside the case include?
- Motherboard
- microprocessor
- RAM
- power supply
- hard drive
what are input devices?
input devices are hardware devices that allow the user to input data and instructions to a computer system
what are the most common input devices?
keyboard, mouse, mouse alternatives (touchpad, trackball), microphone, digital camera, webcam, scanner, touch screen, stylus, game controllers
(steering wheel, joystick), barcode reader/scanner.
what are output devices?
output devices are hardware devices that allow the user to receive data from a computer system
what are the most common output devices?
monitor (screen), headphones, speakerphones, printer, projector and others
how many categories are there for storage and what are they?
there are 2 categories of storage. they are short-term storage and long-term storage.
what is short-term storage?
short-term stores data and instructions as long as the program is running or the computer system is on
what is long-term storage?
long-term stores data and instructions even after the computer system is shut down. Files are stored until the user deletes them.
what is the short-term storage in a computer? and what does it do?
Short-term storage in a computer system is the RAM (random access memory).
It stores data/instructions as long as the program is running or the computer is on.
what do Long-term storage devices include? and what do they do?
they include…
hard drive
USB flash drive
CD and DVD
Blu-ray disk
SD card
They store files until the user
deletes them.
what are CDs, DVDs, and Blu-ray disks referred to as?
CDs, DVDs, and Blu-ray discs are all referred to as optical discs
what are the different types of computer systems?
computer systems aren’t just computers. They come in many different shapes and sizes.
ex…
desktops, laptops, tablets, smartphones, smartwatches,
game consoles and TVs.
how can computer systems be classified?
Computers can also be classified based on the manufacturer or the operating system it runs.
what are 2 popular categories of classified computers?
PCs and Macs
what does a Power Supply unit in a computer system do?
it converts the electrical signal from the wall outlet to the type needed by a computer.
what does the cooling system (Fan) do?
it expels warm air from inside the case and draw cool air from outside to cool
components including the processor.
what do expansion cards do?
they add and improve certain functions
