May 2018

Question 1

benefits of incremental backup

Answer 1

Only the changes need to be backed up
 The software/OS/settings are unlikely to have changed
between backups
 Small number of files likely to be used/edited between
backups
 Take less time to backup
 Each backup will take less memory space to store

Question 2

benefits of a full backup

Answer 2

Backup all the data/files and software
 It might not take a significant time to back up entire
system
 He might only have a small number of files to be backed
up each time
 Safer as have more past versions to revert to
 User may have changed settings on computer
 Faster to restore the backup
 Needs to do a full before he can do an incremental

Question 3

Creative Commons licence

Answer 3

-Choose what other people can do with videos
-choose to have people give credit
-allows free distribution
-work still copyrighted
-can insist on crediting

Question 4

what happens after an IP address has been found and returned to the user’s computer

Answer 4

-The request is put into packets
-The packet is given the address and number
-The packets are sent across a network
-the packets are received by the host server
-The server checks if the packets have arrived
if they have not
-a timeout is sent to request the packets are resent
if they have arrived
-the packets are out in order
The request is processed by the web server

Question 5

why may a quad processor not run as fast as a dual core processor (3)

Answer 5

- Software may be designed to run on 1 core and not
multiple cores
// depends on the task(s)
 …some tasks cannot be split across cores
 Clock speed also affects speed
// dual core may have a faster clock speed
// quad-core may have slower clock speed
 ….so one task may be run faster/slower
 RAM size also affects speed
// Quad-core may have less RAM
// amount of VM being used
 Cache size also affects speed
// Quad-core may have less cache

Question 6

Why may getting more RAM be more beneficial than virtual memory (2)

Answer 6

-More RAM will improve the performance of the
computer // More RAM will speed up the access to
data
 Excessive use can cause disk thrashing …
 …which decreases performance
 VM is slower to access than RAM direct (because it
has to go back to RAM first)
 Moving data between RAM and VM takes
processor time