Systems Unit

Question 1

Planning - What is the context?

Answer 1

The current situation and problem

Question 2

Planning - extent and limitations

Answer 2

Figuring out the exact features needed and not to save time

Question 3

Planning - organisational issues

Answer 3

The legistics/ infrastructure that needs to be sorted out

For example, a school attendance system might be used on a sports
field, requiring a system that can run in a wireless network using
portable devices.

Question 4

Planning - underlying technologies

Answer 4

What the code has to work with/ what is there

Examples: OS, hardware, wifi speed etc.

Question 5

What is change management?

Answer 5

Making sure that the new code will work on the old infrastructure with easy turnover

Example problems include: old hardware not being good enough to run system

Question 6

Compatibility - Legacy

Answer 6

The need to support old standards, if that is what is being used.

Question 7

Compatibility - business mergers

Answer 7

During business mergers, the data is often stored in different formats. Which can result in data loss or recovery.

Question 8

Compatbility - compatibility

Answer 8

the issue of whether two computer systems

can function together successfully

Question 9

Implimentation - Remote (not on device) advantages

Answer 9

• Centralised (easy to update)

- Use thin clients (on device) meaning can run on large amount of devices with limited power

Question 10

Implimentation -Local advantages`

Answer 10

Local is always faster than remote and could be used offline

Question 11

What is software as a service?

Answer 11

“renting” software on a temporary basis,
rather than selling the software or the
software license.

Example: itunes being free but need to buy content

Question 12

What is a direct changeover?

Answer 12

Immediate changeover of software, the old software is discarded.

Question 13

What is a phased implimentation (change over)?

Answer 13

A gradual process where the use of the old system is reduced and use of the new system is increased

Question 14

What is parallel running (changeover)?

Answer 14

When both system systems are running and supported simultaniously.

• Safest
• Double the work

Question 15

Data migration - data structures problems

Answer 15

Incompatiblity between types of data from the old system.

For example an SQL database might not be able to run on an outdated version of java

Question 16

Data migration - currency

Answer 16

Currency will not always be the same in a global system and might need to be converted or supported.

Question 17

Types of testing

Answer 17

User acceptance (final step/client tesing), debugging (first/continous while programming), beta
(small group tesing)

Question 18

User documentation problems

Answer 18

• normal users are not interested in figuring out
• Bad documentation may cause frustrationand decreased productivity
• Software should conform to the norms, young programmers will try to make flashy unintuative software

Question 19

Types of user training

Answer 19

Formal classes (face to face), online training (youtube/zooms), multimedia presentation (powerpoints)

Question 20

Training - advantages of formal classes

Answer 20

Management can be sure everyone has the proper training

Question 21

Training - online training advantages

Answer 21

Users can stay seated while they learn from anywhere

Question 22

Training - multimedia presentations advantages

Answer 22

More enjoyable than a simple text manual

Question 23

2 Causes of data loss

Answer 23

• Malicious

- natural disaster

Question 24

Example consequences of data loss

Answer 24

no bank records => no money
incorrect password => you cannot log in, no access
incorrect birth date => can affect credit rating, medical treatment
lost purchase order => items do not get delivered

Question 25

3 data loss prevention methods

Answer 25

Failover (2nd backup server), redundancy (batckups stored in a safe place), removeable media (less frequent backups to a seperate site).

Question 26

What is a release?

Answer 26

A whole new version, which might need to be reinstalled.

Example windows 7 => windows 8

Question 27

What is an update?

Answer 27

Small impovements or fixes often automatic

Question 28

What is a patch?

Answer 28

Very small bug fixes, usually automatic

Question 29

SLDC Step 1:

Answer 29

Requirements and analysis

Question 30

SLDC Step 2:

Answer 30

Design

Question 31

SLDC Step 3:

Answer 31

Implementation

Question 32

SLDC Step 4:

Answer 32

Testing/operation

Question 33

SLDC Step 5:

Answer 33

Maintanance