1.7.2 Utility Software.doc - GCSE Computer Science 9-1 ...

GCSE Computer Science (9-1)
2 2
System Software - Utilities
Questions
Question Zone 1-3
1. Define the term ‘Utility Software’. [2]
2. List 5 different examples of ‘Utility Software’ and for each one give a brief
description of its purpose. [5]
3. Explain how encryption software works. [3]
Question Zone 4-6
1. Explain how encryption software works. [3]
2. Explain the need for ‘Defragmentation Software’. [4]
3. Describe what compression software does and explain the difference between
‘Lossy’ & ‘Lossless’ compression methods, using examples to support your
answer.[5]
Question Zone 7-9
1. Describe what compression software does and explain the difference between
‘Lossy’ & ‘Lossless’ compression methods, using examples to support your
answer.[5]
2. Explain the purpose of ‘Backup Software’ and describe two methods that
‘Backup Software’ may use. [6]
3. Explain why a hard drive which has had its data wiped (using formatting
software) could still have its original data retrieved. [5]
Computer Science UK Membership Site Licence: Do not share outside your centre.

GCSE Computer Science (9-1)
2 2
Computer Science UK Membership Site Licence: Do not share outside your centre.
object, file, and network packet or application, so
that it is secure and unviewable by unauthorized
users.
Defragmentation software is needed to your
computer perform better. It puts related files into
different sectors. For example, if two files that has
similar qualities or needs will be put in the same
sectors as each other.