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Explain lossless compression.
Lossless compression is when an image or document is reconstructed in a more efficient way using an algorithm to rewrite it. No data is lost from the file despite the compressed version taking up less memory...
FW
Answered by
Freya W.
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Computing tutor
2610 Views
Define resolution in regards to images and how it differs from colour depth
Resolution is the number of pixels in a given unit area (dots per inch). A higher resolution increases the quality of an image. Colour depth is the amount of memory stored by each pixel (number of bits per p...
FW
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Freya W.
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Computing tutor
5425 Views
Convert the hexadecimal '3E', which represents a 2's compliment binary number, in decimal.
Firstly, represent the 3 16 and E 16 as 2 four bit binary numbers (known as nibbles). Once we have this (0011 and 1110 respectively), we can then combine them back together, into one 8-bit 2's compliment bin...
JB
Answered by
John B.
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Computing tutor
7447 Views
What is recursion and why is it useful?
Recursion is when a named block of code (a subroutine or function ) calls itself. We can use recursion to describe some algorithms in very few lines. For example, the following block of pseudocode will recur...
JW
Answered by
John W.
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Computing tutor
2310 Views
What is Https?
Https or hyper text transfer protocol secure is a method that is used to securely transfer data between the client and the webserver. This ensures that the data packets sent have been encrypted so that if in...
HP
Answered by
Harsh P.
•
Computing tutor
2090 Views
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