Computer Systems Flashcards
The Unicode code system represents ….
The Unicode code system represents each character in a 16 bit (2 bytes) code, although it can use 8, 16, or even 32 bits, depending on the character set.
ASCII is limited …
ASCII is limited in the number of characters that can be represented (256).
What are the advantages and disadvantages of UNICODE over ASCII?
Compare the size of a bitmap graphic v a vector graphic
A bitmap graphic nearly always has a much larger file size than a vector graphic.
What is the impact on file size of a blank bitmapped graphic v blank vector graphic?
What is the impact on resolution of a bitmapped graphic v a vector graphic?
What are the key uses of a bitmapped graphic v a vector graphic?
What are the advantages and disadvantages of Bit Mapped Graphics over Vector Graphics?
What is the ‘FETCH-EXECUTE CYCLE’?
What factors can improve the performance of a computer system?
Describe the ENVIRONMENTAL IMPACT of intelligent systems:
- Heating Systems
- Traffic Control
- Car Management Systems
Describe one environmental advantage of UPGRADING a computer v BUYING a new computer.
State one reason why the increased use of technology has had a negative effect on the environment
What offences are recognised in the COMPUTER MISUSE ACT (1990)?
Describe two implications of the REGULATION OF INVESTIGATORY POWERS ACT (2000)?
What is a DENIAL OF SERVICE ‘DoD’ attack, and what are the key impacts?
What does BANDWIDTH mean?
What does DOMAIN NAME SERVICE (DNS) mean?
Describe the use of PUBLIC and PRIVATE keys
What are DIGITAL CERTIFICATES?
What are DIGITAL SIGNATURES?
What is an IP ADDRESS?
If you download a file from the Internet, how can you be sure the files you download aren’t corrupted or tempered with?
What are CIPHERS?
