Module 6

Question 1

3 aspects universal to all forms of IT communication

Answer 1

• Synchronicity
• Persistence/ recordability
• Anonymity

Question 2

Components of information systems

Answer 2

Input > Processing > Output ->

^—– Feedback

Question 3

Feedback mechanism necessary to

Answer 3

Continually improve the input and processing functions of info system

Question 4

Information attributes

Answer 4

• Confidentiality
• Integrity (complete and accurate)
• Availability

Question 5

Input

Answer 5

Entry of data into a system via keyboard, scan or uploading file. Can be done at time of transaction or later eg batch. Done near system or remotely. Involves element of validation.

Question 6

Processing

Answer 6

Act of system performing some type of action on the data eg calculation, aggregation or manipulation

Question 7

Output

Answer 7

Information provided after processing the data transactions. Any type of information required by business process.

Question 8

Input devices examples (4)

Answer 8

• Smartphone
• Keyboard
• Mouse
• Card reader

Question 9

Processing units

Answer 9

Perform operations on the data. Central processing unit = CPU.

Question 10

Output devices examples (3)

Answer 10

• Screens
• Printers
• Files

Question 11

Storage devices examples (4)

Answer 11

• Cloud storage
• Storage area network (SAN)
• Network attached storage (NAS)
• Bits

Question 12

Network =

Answer 12

Two or more computers connected together. LAN (local area network), WAN (wide area network), the internet

Question 13

Computer software

Answer 13

Enables a computer to perform specific tasks eg operating systems, communication systems, security software, utility software

Question 14

Program development (3)

Answer 14

• Typically developed in separate development environment
• Undergo extensive testing
• Controls must exist for migration to avoid mistakes

Question 15

Program development controls (3)

Answer 15

• Design controls
• Version controls
• Storage controls

Question 16

Design controls

Answer 16

Waterfall approach > requires each stage to be finished before next can be started

Question 17

Version controls

Answer 17

Required to ensure programmers do not adversely affect each other’s work eg only one person works on specific code at a time

Question 18

Storage controls

Answer 18

Controls over soft and hard copy data storage and retrieval through data management systems

Question 19

General application software

Answer 19

Used to record data and convert it into information for a user

Question 20

Protocols and standards

Answer 20

Rules in place for writing software - allow greater interoperability or interactions between systems

Question 21

Protocols and standards examples (4)

Answer 21

• HTML
• HTTP
• URL
• XBRL

Question 22

Modelling performed at three levels

Answer 22

• Conceptual
• Logical
• Physical

Question 23

Conceptual modelling

Answer 23

Shows entities that are important to organisation

Question 24

Logical modelling

Answer 24

Describes tables and columns to be used in system

Question 25

Physical modelling

Answer 25

Describes the storage of data and technical details

Question 26

Database management systems (DBMSs)

Answer 26

Software designed for purpose of managing databases

Question 27

Organisations much manage (2) of database documentation

Answer 27

• Storage

- Administration

Question 28

IT organisation in sizeable business has four major functions

Answer 28

• Strategy and policy
• Operations (maintenance)
• Projects (systems development)
• Support (user assistance)