SLR5 - Application Generation

Question 1

Define Source code

Answer 1

The original code for the software

Question 2

Define Closed source

Answer 2

A piece of software that doesn’t come with the source code and is copyrighted.

Question 3

Define Open source

Answer 3

A piece of software that comes with the original source code, normally free of charge and used for creativity.

Question 4

Define System Utilities

Answer 4

Looks after the PC, for example; a firewall or disk defragmentation.

Question 5

Give some advantages of open source

Answer 5

Free License
User can modify
Available source code
Share with others
New/Different Versions must be shared with the same license/access permissions.

Question 6

Give some disadvantages of open source

Answer 6

Finished product may not be as professional.

Limited support/Support mainly from other users.

Question 7

Give some advantages of closed source

Answer 7

Free Support (Most likely pay for the product to begin with)
Free Updates
Software is covered by trade description act(must work)
Often better as it is being sold and the developers get paid.

Question 8

Give some disadvantages of closed source

Answer 8

Software can’t be altered
The source code isn’t easy to get
Software can’t be shared with other users.
Can be expensive

Question 9

Give examples of utility software

Answer 9

Disk Defragmentation
Anti-Virus
Compression
Backup
File Management

Question 10

Explain the purpose of disk defragmentation

Answer 10

Over time files on hard drives can be come split up and spread apart making retrieval of files slower. This software helps to consolidate the parts of the files back together.

Question 11

Explain the purpose of Anti-Virus

Answer 11

Helps to detect and remove malicious programs which were designed to harm a computer in some way.

Question 12

Explain the purpose of Compression

Answer 12

Reduces the amount of space information takes up of a storage device.

Question 13

Explain the purpose of Backup

Answer 13

Provides a way to recover data in case the original copy gets lost, deleted or corrupted.

Question 14

Explain the purpose of file managers

Answer 14

Allows directories, folders and files to be created, moved, copied, deleted and renamed.

Question 15

Explain the purpose of a translator

Answer 15

Consists of assemblers, interpreters and compilers to convert source code into machine code.
Converts high level code to machine code
One to many relationship

Question 16

Explain the purpose of a interpreter

Answer 16

Converts high level source code into machine code.
Converts high level code to machine code
One to many relationship

Question 17

Explain the purpose of a compiler

Answer 17

Converts high level source code into object code then into machine code.
Converts high level code to object to machine code
One to many relationship

Question 18

Explain the purpose of a assembler

Answer 18

Converts low level code into machine code.
1 to 1 relationship
Assembly Language to Machine code

Question 19

Explain some advantages and disadvantages of Interpreters

Answer 19

Good for debugging
Stops at first error
Some security issues
Can be slower
Runs one line of code at a time
Good for large blocks of code.

Question 20

Explain some advantages and disadvantages of Compilers

Answer 20

Can be slow
Is more compatible with platforms
Object code is faster
Not good for debugging
Takes source code translates it all into object code before allowing it to run.