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Explain the difference between lossless and lossy data compression techniques.

as the name implies , a lossless compression technique is designed so that the original file exactly as it was . maximum comparisson possible is about 50% . lossless algorithms use some sort of replacing tec...
NP
Answered by Nikolas P. • Computing tutor
6096 Views

Outline the differences between how a compiler and an interpreter works, and explain the advantages and usage of of each [12 marks]

Compilers work by translating all the program code into source code (machine code) first, which is then ran by the computer. Alternatively, an interpreter works by reading and translating each line of code a...
RP
Answered by Russell P. • Computing tutor
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The numbers 6B and 12 are displayed in hexadecimal form. Convert them into binary form and perform binary addition to find the sum. Convert your answer back into hexadecimal. Show your workings.

The first step is to work out what 6B and 12 are in binary. Starting with 6B , we need to find a four-bit representation of both 6 and B. 6, converts straight to its binary form, simply by adding 1s to the 4...
BC
Answered by Ben C. • Computing tutor
3831 Views

Explain why it is important to check the email address with JavaScript and again when it reaches the server.

It is important to check the email address with JavaScript first on the client-side because it is quicker than the server and you don't need to refresh any pages (assuming AJAX is not used). Additionally, it...
MB
Answered by Matthew B. • Computing tutor
10688 Views

Describe a difference between an array and a linked list.

An array has a fixed data size and cannot hold more elements than said size, whereas a linked list can hold different numbers of elements.
MB
Answered by Matthew B. • Computing tutor
2608 Views