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WorksheetsDigiTech Unit 1 Data 1
Total questions: 10
Worksheet time: 8mins
What is lossless compression?
s an algorithm that compresses data into a form that may be decompressed at a later time, without any loss of data
a technique that compresses the file size by discarding some of the data. The technique aims to reduce the amount of data that needs to be stored.
There are two primary methods that are used to (a) files stored on a computer system; these are lossy and lossless.
Flash drive is used for?
Backing up a home computer system
Storing multimedia files
Moving relatively small files from work to home
Backing large commercial servers on multiple tapes
Optical storage media is
Flash drive
SSD
CD
Magnetic
Analogue data is
Data that is physically represented
Is a combination of numbers 1 or 0
An analogue-digital (A/D) converter is an electronic circuit that converts continuous (a) into discrete digital numbers.
To represent analogue sound as digital data, the (a) process is used.
It is possible to represent (a) colours by using a byte (8 bits) for each pixel.
An advantage of analogue data
As continuous data is stored, there is no deterioration in the quality of the data.
data can deteriorate when it is copied or transmitted as a result of signal corruption from recording equipment.
As a result of data being sampled, the data is not recorded as a whole, as a result, _____ data may be less accurate and of lower quality
(a) are not analogue devices, therefore they could not store data in an analogue format
