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- 1What is an input device?An input device is any hardware device that sends data to a computer.
- 2What is an output device?An output device is any device used to send data from a computer to another device or user.
- 3What is a storage device?A storage device is a device that stores information.
- 4What is the purpose of a power supply?The power supply pumps electricity around the computer.
- 5What is the purpose of the computer case?The case of a computer holds all of the computers components together.
- 6What is the purpose of the motherboard?It sends messages throughout the computer.
- 7What is the purpose of the Processor?The processor is like your brain, it’s where all the processes are carried out (like thoughts in your head.)
- 8What is the purpose of the RAM?Random Access Memory (RAM) is where the computer stores the current task that is being carried out. This is like your short term memory when you are thinking about what you are about to say of have just eaten.
- 9What is the purpose of 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 hard drive is where all of your documents, pictures, programmes etc. are stored on the computer, similar to all of the long term memories in your brain.
- 11What is a repetitive strain injury (RSI) and what causes them?Usually damage to the fingers and wrists caused by
repeated movements over a long period of time. - 12What is the cause of back injuries when using a computer?Usually due to poor posture or sitting in an awkward
position when using a computer. - 13What is eye strain and what is the cause?Usually caused by staring at a computer screen for a
long time. Particularly in poor light, in glare or with a
flickering screen. - 14By law, what do employers have to provide for their employees? (in regards to working with computers)It is now the law that any business makes sure the following are in place for its employees:
tiltable screens
anti-glare screen filters
adjustable chairs
foot supports
suitable lighting
workstations are not cramped
when working on a computer staff take frequent breaks
appropriate eye and eyesight tests by an optician - 15What is the purpose of Binary?The purpose of binary is for the computer to process information in its own 'language'.
- 16How many bits are in a Binary number?8 bits.
- 17Know how to convert from Binary to Denary Know how to convert from Denary to BinaryTo convert binary into decimal is very simple and can be done as shown below:
Say we want to convert the 8 bit value 10011101 into a denary value; we can use a
formula like that below:

As you can see, we have placed the numbers 1, 2, 4, 8, 16, 32, 64, 128 (powers of two) in reverse numerical order, and then written the binary value below.
To convert, you simply take a value from the top row wherever there is a 1 below, and then add the values together.
For instance, in our example we would have 128 + 16 + 8 + 4 + 1 = 157. - 18What devices do you need to connect to the internet?Network, interface, cards, router and modem.
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- Fichas sobre Sin título, creado por Tanner Buckley el 12/10/2018.
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- Tanner Buckley
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