AS Theory

HideShow resource information
What is Data?
Raw numbers, letters, symbols, sounds or images.
1 of 28
What is information?
Data with context.
2 of 28
What is knowledge?
Information which human experience has been applied.
3 of 28
What is Static Data?
Data that does not change.
4 of 28
What is Dynamic Data?
Data that changes automatically without user intervention.
5 of 28
What is a Direct Data Source?
Data collected for the purpose for which it will be used.
6 of 28
What is a Indirect Data Source
Data that is collected for a different purpose.
7 of 28
Give an example of Static Data.
CD-ROMs, Magazines, Totle of web pages.
8 of 28
Give an example of Dynamic Data.
Weather Map.
9 of 28
Quality of information is determined by?
Accuracy, Relevance, Age, Level of detail and Completeness.
10 of 28
What is Encoding?
Storing data in a specific format.
11 of 28
What is Encryption?
Scambling data so it cannot be understood without a decryption key.
12 of 28
Give two advantages of coding?
Storage and Consistency.
13 of 28
Give two disadvantages of coding?
Limited Codes and Interpretation.
14 of 28
What is Ceaser Cipher?
A secret way of writing e.g. the alphabet could be shifted by 3 letters so that A=D, B=E. Its an algorithm.
15 of 28
What is Symmetric Encryption?
Where both sender and receiver need a secret encryption and decryption key.
16 of 28
What is Asymmetric Encryption?
Sender has a public key and recipient has a private key.
17 of 28
What is HTTPS?
Hypertext Transfer Protocol Secure. Encrypted web pages.
18 of 28
Name three methods of checking accuracy of data?
Validation, Verification, Proof-Reading
19 of 28
Name the methods of Validation?
Presence Check, Range Check, Type Check, Length Check, Format Check.
20 of 28
What is OCR. Explain how it works.
Optical Character Recognition.
21 of 28
What is OMR. Explain how it works.
Optical Mark Reader.
22 of 28
What is a Compiler?
Translates a program written in high level language into machine code. The file containing the the code is known as an executable file.
23 of 28
What is an Interpreter?
Same as Compiler but translates each part of the code, line by line.
24 of 28
What is a Linker?
Connects all the different modules of programming code.
25 of 28
Name four different User Interfaces?
Command Line, GUI, Dialogue Interface and Gesture based.
26 of 28
Define Utility Software?
Software that performs some sort of maintenance on the computer system.
27 of 28
Define Operating System?
Software that manages the hardware within a system.
28 of 28

Other cards in this set

Card 2

Front

What is information?

Back

Data with context.

Card 3

Front

What is knowledge?

Back

Preview of the front of card 3

Card 4

Front

What is Static Data?

Back

Preview of the front of card 4

Card 5

Front

What is Dynamic Data?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar ICT resources:

See all ICT resources »See all All resources »