Flashcards
test revision
Flashcards do conjunto (19)
- 1What is an input device?An input device is a piece of computer hardware equipment used to provide data and control signals. inputs on screen.mouse
- 2What is an output device?An output device is any device used to send data from a computer to another device or user.printer
- 3What is a storage device?A piece of computer equipment on which information can be stored.cd
- 4What is the purpose of a power supply?Computers use switching power supplies. The main functions of a power supply include the following: Convert AC to DC. Provide DC voltage to the motherboard, adaptors, and peripheral devices.
- 5What is the purpose of the computer case?It keeps the computer safe and keeps it together.
- 6What is the purpose of the motherboard?A motherboard is one of the most essential parts of a computer system. It holds together many of the crucial components of a computer
- 7What is the purpose of the Processor?The most important component of a computer is the central processing unit, or CPU, also called the processor. The processor acts as the computer's brain,
- 8What is the purpose of the RAM?RAM (random access memory) is the place in a computing device where the operating system (OS), application programs and data in current use are kept so they can be quickly reached by the device's processor.
- 9What is the purpose of a ROM.Stores a
program used to boot up the computer. This
is called the bootstrap loader - 10What is the purpose of the Hard Drive?The most important characteristic of a hard drive is how much data the hard drive can store.
- 11What is a repetitive strain injury (RTI) and what causes them?When you put strain on your body repetitively it is caused by being in an awkward position for a longtime
- 12What is the cause of back injuries when using a computer?poor posture
awkward position - 13What is eye strain and what is the cause?It is when you damage your eyes whilst looking at a bright computer or when you look for too long.
- 14By law, what do employers have to provide for their employees?tiltable screens
screen filters
chairs
foot support
lighting suitable - 15What is the purpose of Binary?A binary code represents text, computer processor instructions, or other data using any two-symbol system,
- 16How many bits are in a Binary number?8 bits
- 17Know how to convert from Binary to Denaryconvert an 8 digit binary number to a normal denary number
- 18Know how to convert from Denary to Binaryfrom a normal denery number to an 8 digit binary number.
- 19What 4 devices are needed to connect to the internet?ISP
Modem
Wireless router
Computer
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- FlashCards sobre test revision, criado por Esa Ahmed em 19-12-2017.
- Criado por
- Esa Ahmed
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