Data 01
Computers use binary code to store data.

Data 01

See how much you know about data in this KS3 ICT quiz on the subject. Computers are designed to process data so it is important to understand what 'data' is and how it is different to 'information'. In general terms, it means the facts and statistics that are collected for analysis. When we talk about data in computers, it is slightly different. It can be defined as the numbers, letters and symbols that are stored, processed and transmitted by a computer. Data has no context in other words. £25 is an example of data but there is no indication of what it is. It could be cost of something, an amount of money that has been lost, how much money is in a piggy bank and so forth.

Storing data on a computer is done using binary code. Binary consists of only ones and zeros. It can be stored in different places on a computer - its built-in memory or a hard disk for example, or it could be stored off the computer on a memory stick (flash drive) or other device. Data is entered into a computer using an input device. Some input devices are automatic like a light sensor or a barcode reader. Others are manual, like a keyboard, touch screen or mouse.

In most computers how many 'bits' make up a 'byte'?
The most common answer - it's not the only correct answer because there are some computers that use more or fewer bits to record a single character
A storage location contains the digits - 31122012.
This might be a piece of data
This is a date
This is a random number
None of these
Looks like a date but really could be almost anything
Which is not a measure of storage size?
It is spelt kilobyte
Data entered should be 'validated'. This means .......
it should be checked to make sure it contains no errors
it should be checked to make sure it is correct
it should be checked to make sure it is sensible
All of the above.
Validation is checking for sensible, reasonable data that is relevant
Data entered should be 'verified'. This means .......
it should be checked for viruses
it should be checked to make sure it is completely accurate
it should be checked to make sure it is entered correctly
it should be checked to make sure it is reasonable
Entering a password twice is a common example
Data is .......
an item of computer software
letters, numbers or characters with meaning
letters, numbers or characters with no meaning
stored numbers
Data turns into information when it is analysed
Data enters a computer .......
before processing but after the entry stage
during the entry stage
during the input stage
during the processing stage
Remember the order - input, processing then output
Which is not a means of entering data into a computer?
Bar-code reader
A monitor is an output device
Data is stored by computers in locations called .......
Bite or bites are alternative spellings
Computers use binary code to store data because .......
binary code is more reliable
binary code is much faster
binary code takes up less space
electronic circuits can only be 'on' or 'off'
A circuit which is 'on' represents '1', 'off' represents '0'
You can find more about this topic by visiting BBC Bitesize - Data and databases

Author:  Duncan Daish

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