CS (Data protection & representation) Flashcards
Data Protection Act 2018?
Personal data must be obtained for specific and lawful purposes only.
Computer Misuse Act 1990?
Created to deal with modifying and accessing information without permission
Freedom of Information Act 2000?
It gives the public access to government information
Copyright, Designs and Patents Act 1988?
Grants people exclusive rights to control the use and distribution of their work
What is not a factor in the digital divide? Age, Wealth, Location or Gender
Gender
Meaning of bit depth?
Number of bits used to record each sample
What files would you not use for lossy compression? Image, Sound, Video or Word
Word
If an image has a 5-bit colour depth, what is the total number of colours that could be used per pixel?
32 colours
How many bytes in a megabyte?
1,000,000 bytes
Result of 16 MOD 5?
1
Two lossless file types?
PDF and PNG
If an image has a 4-bit colour depth, what is the maximum number of colours that could be represented?
16
What is a boolean?
Can only be true or false
What is a character?
One letter or number
What is an integer?
Whole number
What is a real/float?
Numbers that have decimal or a fractional part to them
What is a digital image?
Image composed of picture elements, known as pixels.
What is compression?
Making a file smaller than what it originally is
What is a pixel?
One of the small squares/dots that make up an image on a computer screen.
What is resolution?
Level of detail contained in an image. It refers to the number of pixels that exist within the image.
What is lossy compression?
Reducing the size of a digital file by removing some of its data.
What is lossless compression?
Reducing the size of a digital file without losing any information.
