Data Representation KO
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| show | 0 and 1
Computers use binary – digits 0 and 1 – to store data
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| Denary (Base 10) | show 🗑
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| Bit (b) | show 🗑
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| Nibble | show 🗑
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| show | 8 bits
- A group of 8 Bits is called a Byte
Equal to one character on the keyboard
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| Kilobyte (KB) | show 🗑
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| Megabyte (MB) | show 🗑
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| Gigabyte (GB) | show 🗑
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| Terabyte | show 🗑
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| Petabyte (PB) | show 🗑
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| ASCII | show 🗑
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| show | Extended ASCII is a character set which gives each character an 8-bit binary code, allowing for 256 characters. The first 128 characters are in exactly the same order as the ASCII Characters
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| Unicode | show 🗑
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| Conversion | show 🗑
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| Transistor | show 🗑
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| Overflow Error | show 🗑
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| show | A group of characters that a computer recognises from their binary representation
Standard character set are ASCII, Extended ASCII and Unicode
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| Pixel | show 🗑
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| Colour Depth | show 🗑
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| Analogue | show 🗑
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| show | The number of audio samples that are taken per second
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| Sample rate | show 🗑
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| show | A digit added to a string of digits which is used to check is all the digits have been entered and read correctly
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| show | The modulo operation (abbreviated “mod”, or “%” in many programming languages) is the remainder when dividing. For example, “5 mod 3 = 2” which means 2 is the remainder when you divide 5 by 3.
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| show | A bit placed at the end of binary data to show if it has been received correctly
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| Vector Graphic | show 🗑
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| Bitmap Graphic | show 🗑
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| Resolution (graphics) | show 🗑
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| Metadata | show 🗑
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| show | A method of reducing file sizes, particularly in digital media such as photos, audio and video.
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| show | Bit Rate is the number of bits used per second of audio - it is calculated using...
Bit Rate = Sampling Frequency x Sample Size x no. of channels
Increasing the sampling frequency and sample size will increase the bit rate
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| Lossy Compression | show 🗑
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| show | Data redundancy is a condition created within a database or data storage technology in which the same piece of data is held in two separate places.
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| Run-length encoding | show 🗑
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| Bit Depth | show 🗑
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| GIF | show 🗑
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| show | oint Photographic Experts Group - a digital image format which uses lossy compression.
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| Memory | show 🗑
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| show | Portable network graphics - a digital image format that uses lossless compression.
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| Resolution | show 🗑
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| show | Gaps between each of the points where the analogue recoding is sampled E.F the audio file might be sampled every 5 milliseconds (ms) - the sampling interval would be 5ms
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| Sampling Frequency (Sample Rate) | show 🗑
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| Sample size | show 🗑
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| Lossy | show 🗑
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| show | The number of pixels per square inch of display
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| show | Work right to left and apply the rules
1) 0+0 = 0
2) 0+1 = 1
3) 1+0 = 1
4) 1+1 = 0 and carry 1
5) 1+1+1 = 1 and carry 1
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
Jennybutton
Popular Computers sets