MEMORANDUM

SECTION A: SHORT QUESTIONS
QUESTION 1
1.1
1.1.1 Audit trail ✔ (1)
1.1.2 Destructor ✔ (1)
1.1.3 Smartwatch ✔ (1)
1.1.4 Robotics ✔ (1)
1.1.5 Compiler ✔ (1)
1.1.6 BitTorrent ✔ (1)
1.1.7 Internet of Things ✔ (1)
1.1.8 Transaction Processing System/TPS ✔ (1)
1.1.9 Green Computing ✔ (1)
1.1.10 Webinars ✔ (1)
1.2
1.2.1 B ✔ a sequence of logical steps that will solve a problem (1)
1.2.2 D ✔ 9 (1)
1.2.3 B ✔ A dynamic link library file (1)
1.2.4 D ✔ Denial-of-service attack (1)
1.2.5 B ✔ Encapsulation (1)
TOTAL SECTION A: 15

SECTION B: SYSTEM TECHNOLOGIES
QUESTION 2
2.1
2.1.1

1. Cache is a small amount of high speed memory ✔ where data and instructions likely to be used next by the CPU is stored, eliminating the need to fetch it from the slower RAM. ✔
   Concepts:
   • High speed memory
   • Saving time in fetching instructions (2)
2. Cache is embedded on the processor / It is built on the processor and is not removable. ✔
   Concept:
   • not removable / embedded (1)
3. Any TWO ✔✔
   • Faster at boot up time / faster access time
   • No moving parts and is less easily damaged/longer life span /lasts longer/more reliable
   • Uses less power
   • Generates less heat
   • Smaller dimensions (2)

2.1.2

1. Any TWO ✔✔
   • Provides a user interface
   • I/O management
   • Process management
   • File management
   • Security
   • Manages system memory
   • Optimises efficiency/speed (2)
2.                    
   1. Android is designed for mobile devices ✔ such as smartphones and tablets. (1)
   2. Linux Ubuntu is designed to be used in a network or server or desktop environment (not by mobile devices). ✔ (1)

2.2
2.2.1 Any ONE ✔ (1)

• Manage/Maintain/Control computer resources
• Adds more functionality for specific management tasks
• Performs routine maintenance and administration tasks in a computer (1)

2.2.2 Any ONE ✔

• Internet filters
• Spam blockers
• Pop-up blockers
• Anti-spam programs
• Phishing filters
• Any other filtering tool (1)

2.3
2.3.1 Fast and reliable Internet connection ✔ (1)
2.3.2

• Cloud application – is software where most of the processing of the software is done in the cloud by one or more servers on the Internet. ✔
• Local application – is the software/program that is stored and runs on a computing device. ✔ (2)

2.3.3 Any THREE ✔✔✔

• Scalability
• Ubiquity (Anywhere/Anytime)
• Enables collaboration
• Outsources maintenance and upgrades of hardware
• Outsources software and installation and upgrades (3)

2.3.4

• Cloud-based apps ✔ – software that runs on remote servers on the internet ✔
• Downloadable, local installed apps ✔ – software that you rent is downloaded and runs on your local computer✔
• Integrated products ✔ – combine cloud-based software and locally installed software ✔ (6)
  TOTAL SECTION B: 23

SECTION C: COMMUNICATION AND NETWORK TECHNOLOGIES
QUESTION 3
3.1 Any TWO ✔✔

• High level of expertise is needed to set it up
• Need a high level of security
• Malware can spread very easily
• If network develops a problem, no one can work
• A central problem with server could lead to loss of connection to network/ non-availability of resources if the server is down/offline
• Cost of hardware (2)

3.2
3.2.1

• Switch/Central connection point ✔
• Computers/nodes ✔
• Separate connection to the switch ✔ (3)

3.2.2 Any TWO: ✔✔

• Easy to troubleshoot
• Easy to set-up
• Easy to add new devices
• Faster transmission of data to correct computer through a switch
• Can remove any computer that does not work without affecting the network (2)

3.3
3.3.1 Any ONE ✔

• Cheap to install
• Easy to install
• Flexibility of cables
• High bandwidth over short distances (1)

3.3.2 Any TWO ✔✔

• Electro Magnetic Interference (EMI)
• Crosstalk
• Eavesdropping (2)

3.3.3 Any ONE ✔

• Amplifier can be used to boost the signal quality
• Multiple Access Points added to increase the accessibility radius (1)

3.4
3.4.1 HTTPS ✔ (1)
3.4.2
3.4.1 Any ONE ✔

• Making video/audio/video calls over the Internet/network
• Provides a two-way multimedia communication over the Internet (1)

3.5
3.5.1 Video on Demand ✔ (1)
3.5.2 Hotspot ✔ (1)
3.5.3 To provide Internet access / to provide internet connection ✔ (1)
3.5.4 Wi-Fi / Wireless connectivity ✔ (1)
3.6
3.6.1

• Digital certificate – is an electronic document/ certificate issued by a third party ✔ to verify/authenticate the identity of a person or an organisation ✔ may be trusted for communication of sensitive information. (2)

3.6.2 Certificate Authority/CA ✔ (1)
3.6.3 Any ONE ✔

• Investigate and verify that the business or organisation is what it claims to be
• Its website exists at the IP address specified
• Its public key has not expired (1)

3.6.4 Any FOUR ✔✔✔✔

• Owner’s public key
• Owner’s name
• Expiration date of the public key
• Name of issuer (the Certificate Authority that issued the digital certificate)
• Serial number of the digital certificate
• Digital signature of the issuer (4)
  TOTAL SECTION C: 25

SECTION D: DATA AND INFORMATION MANAGEMENT
QUESTION 4
4.1
4.1.1 Any ONE ✔

• Yes/No
• Boolean (1)

4.1.2 

Concepts:

1. PK ✔ in tblDepartment and PK ✔ in tblEmployees (2)
2. FK, ✔ DepartmentID ✔ and tblEmployees ✔ (3)
3. 1 ✔ and ∞✔ (2)

4.2
4.2.1

Related Items

• Insert anomaly - the database design prevents a user from capturing data when they want or need to. ✔
• Delete anomaly – deleting one piece of data results in the simultaneous removal of other, unrelated data. ✔
• Update anomaly – when an item of data changes, it has to be altered/changed in multiple records in the table. ✔ (3)

4.3
4.3.1

• Physical integrity – overcoming practical issues such as power failure, mechanical failure, natural disasters and dealing with the physical storage and retrieval of data. ✔
• Logical integrity – correctness of data or data making sense in a particular context. ✔ (2)

4.3.2 UPS ✔ and RAID ✔ (2)
4.4
4.4.1 Physical independence ✔ and Logical independence ✔ (2)
4.4.2

• The actual data management is left to the DBMS software ✔
• Multiple applications can interface to the same data because the physical structure of the database is not a factor. ✔
• The use application cannot change the structure or format of the data ✔ (3)

4.5

• Rollback – happens when the DBMS gets the instruction to reverse a transaction or series of transactions and restores the data back to its previous state. ✔
• Record lock – happens when a record is open, either for editing or for inserting, the record is flagged as in use and no other user can make changes to that specific record. ✔ (2)
  TOTAL SECTION D: 22

SECTION E: SOLUTION DEVELOPMENT
QUESTION 5
5.1 Any TWO ✔✔

• The button at the top should be placed at the bottom
• The edits should be empty
• The order is incorrect – put Name first
• Could use SpinEdits for age instead of an Edit (2)

5.2
5.2.1

(3)
5.2.2 Debugging is a technique/process of finding/locating ✔ and resolving ✔defects/problems/errors/bugs. (2)
5.3
5.3.1 Creates a link between an external/physical/permanent/textfile ✔ and variable textfile/logical file ✔ in the program (2)
5.3.2 Reset opens ✔ a variable textfile and moves the file pointer/cursor to the start/beginning of the file, ✔ ready to start reading. (2)
5.4
5.4.1

• Array – a data structure that contains a group of variables containing values of the same data type ✔
• Index – an ordinal value indicating the position of the element in the array ✔ (2)

5.4.2 Subscript ✔ (1)
5.5
5.5.1

• Space is created in memory ✔ to keep the attributes of a specific object ✔
  OR
  A constructor is used to create an instance of the object class/a space is reserved in memory which is allocated to the properties of an object class. (2)
  Constructor ✔ (1)

5.5.2

• Auxiliary method – methods (procedures or functions) in the class that can assist with calculations and formatting.✔
  OR
  Methods which perform specific tasks without modifying the state of the object (i.e. the content of any of the instance fields).
  Example: toOutputString ✔ (2)

5.6

(21÷3) = (7)
TOTAL SECTION D: 26

SECTION F: INTEGRATED SCENARIO
QUESTION 6
6.1
6.1.1 orico.co.za ✔ (1)
6.1.2 Classen Jim and Breeze Kelly ✔ (1)
6.1.3 Spoofing ✔ (1)
6.2
6.2.1 Secure Sockets Layer is an encryption protocol ✔ for managing the transmission of sensitive data over the Internet ✔ (2)
6.2.2 Any TWO ✔✔

• DRM (Digital Rights Management)
• ATM
• Internet browsers
• Skype calls
• Online storage devices (2)

6.3 Any TWO ✔✔

• Network engineer
• Network architect
• Network administrator
• Network analyst (2)

6.4
6.4.1 Biometrics refers to the use of personal characteristics ✔ to authenticate the identity of a person. (1)
6.4.2 Any ONE suitable example ✔

• Retina/Eye
• Fingerprint
• Voice recognition
• Facial recognition
• Palm readers (1)

6.4.3 Any TWO ✔✔

• Cards can be cloned
• Cards can be stolen/lost
• Inconvenience of carrying cards around
• Cots of manufacturing cards
• Cards do not validate the identity of the user
• RFID cards can be read from a distance that can trigger the unlocking of the room even when not required (2)

6.5
6.5.1 Computer drone – is an unmanned aerial vehicle or is an aircraft without a human pilot aboard. ✔ (1)
6.5.2 It is used to gather information especially where the environment may be dangerous for humans. ✔ (1)
6.5.3 Any THREE ✔✔✔

(3)
6.6
6.6.1 Distributed database refers to parts of the database ✔ that are spread over multiple servers in different locations. ✔ (2)
6.6.2 Any TWO ✔✔

• Eliminate congestion on a single server
• Can handle a large number of simultaneous users
• The branches of a company can be spread over a large geographical area
• If one server is down, other databases can be used
• Lower cost of communication as less data is being communicated. (2)

6.7
6.7.1 Wiki – a web application that allows people to add to and modify the content of an online knowledge resource. ✔ (1)
6.7.2 Any TWO ✔✔

• Free access or low cost access to information
• Collaboration
• Publish and share documents
• Flexible tool which can be used for a wide range of applications
• Knowledge centre (2)

6.7.3 Any TWO ✔✔

• Poor quality
• Poor standard
• Information not properly researched and approved (2)

6.8 Click farms refer to businesses that use groups of low paid workers whose work is to repetitively click on links ✔ to fake high web traffic. ✔ (2)
6.9
6.9.1 Any TWO ✔✔

• Limit time on the web
• Turn off notifications when doing important work
• Remove yourself from FOMO
• Refrain from insulting other people/bullying
• Be aware that all posts are public
• Do not befriend strangers
• Do not share personal information e.g. ID number, bank account numbers, address etc.
• Be aware that the Internet never forgets information/cannot delete information from the Internet. (2)

6.9.2 Piggybacking ✔ (1)
6.10 Telecommuting – working in decentralised locations e.g. from home, ✔ but using modern communication ✔ to check in at a physical office. (2)
6.11 Virtual office refers to a fixed physical address, ✔ containing minimal office setup which is used as a shared space ✔ by people who work from a mobile office. (2)
6.12

• Fix errors or bugs in our existing programs ✔
• Close/seal security loopholes that hackers and malware might try to exploit ✔
• Add new features and improvements to existing software ✔ (3)

TOTAL SECTION F: 39
GRAND TOTAL: 150