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revision flashcards
Cards in this deck (18)
- 1What is an input device?an input device is something that is used to provide data and control signals
examples of an input device are a keyboard a mouse and a camera - 2What is an output device?An output device is any piece of computer hardware equipment which changes information into human-readable form
- 3What is a storage device?a storage device is something that stores information.things such as a hardrive are examples of storage devices
- 4Give an example of input, process and output devicesome examples of a input device are a keyboard ,a mouse and a camera
some examples of a output device are a printer, a projector and speakers - 5What is the purpose of a power supplyto provide electricity for things like computers ,laptops, televisions and phones when they need to be charged
- 6What is the purpose of the computer case?a computer case is somethings that contains the main components of a computer
- 7What is the purpose of the motherboard?The purpose of the motherboard is to send messages to all of the components inside the computer like your nerves send signals to different parts of your body.
- 8What is the purpose of the Processor?The most important part of a computer is the central processing unit, or CPU, also called the processor. The processor is like the computer's brain.
- 9What is the purpose of the RAM?the RAM also known as (Random Access Memory) is the hardware in a computer device where things which are being used use are kept so they can be quickly reached by the device's processor.
- 10What is the purpose of ROM?Stores a program used to start up the computer. This is called the bootstrap loader
- 11What is the purpose of the Hard Drive?the purpose of a hard drive is to store information
- 12What is a repetitive strain injury (RSI) and what causes them? What is the purpose of Binary? How many bits are in a Binary number? Know how to convert from Binary to Denary Know how to convert from Denary to Binaryrepetitive strain injury (RSI) happens when you are doing something for a long time repeatedly without a break some people who work on computers all day long may find that they have back injuries, or eye strain
- 13What is the cause of back injuries when using a computer?back injuries are usually caused by poor posture or sitting in an awkward
position when using a computer. - 14What is eye strain and what is the cause?eye strain is usually caused by staring at a computer screen for a long time. Particularly in poor light or with a flickering screen.
- 15By law, what do employers have to provide for their employees? (in regards to working with computers)tillable screens ,adjustable screens, foot support, suitable lighting,
workstations are not cramped,
when working on a computer staff take frequent breaks - 16What is the purpose of Binary?Binary is a number system that only uses two digits: 1 and 0. All information that is processed by a computer is in the form of a sequence of 1s and 0s. Therefore, all data that we want a computer to process needs to be converted into binary.
- 17How many bits are in a Binary number?there are two bits in a binary number 1 and 0
- 18What devices do you need to connect to the internet?you need a computer a network interface cable a router and a moder
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- Flashcards on revision flashcards, created by Maryam Batool on 12/10/2018.
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- Maryam Batool
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