more paper 2 stuff

Question 1

a database is stored at an office. staff use a client server database system. describe an example of a problem that could occur if no systems were in place to manage concurrent access to the database

Answer 1

• two users edit the same data simultaneously
• one user writes the data then the other user writes the data
• only one users update is lost

Question 2

explain why the amount of storage space taken up by vector graphics is significantly smaller by the space taken up by bitmap

Answer 2

• individual parts of the image can be manipulated
• the parts of the image can be scaled without loss of quality
• if an object is deleted, the software knows what is behind it

Question 3

explain why compression is considered necessary for images on the web

Answer 3

transmission of data is faster, and used less data allowance with smaller image files