Information Technology Grade 12 P2 GAU Prelim 2020 QP

Downloaded from hlayiso.com INFORMATION TECHNOLOGY PAPER 2 GRADE 12 PRELIM EXAMINATION SEPTEMBER 2020 TIME: 3 HOURS MARKS: 150 This paper consists of 6 questions and 15 pages

Downloaded from hlayiso.com INSTRUCTONS AND INFORMATION 1. This question paper consists of SIX sections: SECTION A: Short Questions (15) SECTION B: Systems Technologies (24) SECTION C: Communication and Network Technologies (22) SECTION D: Data and Information Management (20) SECTION E: Solution Development (24) SECTION F: Integrated Scenario (45) 150 2. Answer ALL the questions. 3. Read ALL the questions carefully. 4. The mark allocation generally gives an indication of the number of facts/reasons required. 5. Start EACH question on a NEW PAGE. 6. Leave a line open between EACH sub-question. 7. Number the answers correctly according to the numbering system used in this question paper. 8. Write neatly and legibly. Please turn over

Downloaded from hlayiso.com SECTION A: SHORT QUESTIONS QUESTION 1 1.1 Give ONE word/term for each of the following descriptions. Write only the word/term next to the question numbers (1.1.1 to 1.1.10) in the ANSWER BOOK. 1.1.1 A monitor specification indicating image quality. (1) 1.1.2 The process where users are redirected to a different website than the one whose address was entered in the web browser. (1) 1.1.3 An operating system feature designed to make the computer accessible for visually challenged users. (1) 1.1.4 Using the collective processing power of many computers to work on a single, common task. (1) 1.1.5 The general category of software under which Trojans and worms fall. (1) 1.1.6 A protocol that makes it more difficult for a hacker to see what a user is doing online. (1) 1.1.7 The hardware interface between a computer and a network that enables a device to communicate with other devices. (1) 1.1.8 The practice where an ISP gives preference to certain network services, e.g. e-mail. (1) 1.1.9 A technology that uses equipment that allows a user to interact with an imaginary world. (1) 1.1.10 A communication technology that requires a pairing process. (1) Please turn over

Downloaded from hlayiso.com 1.2 Indicate whether the following statements are TRUE or FALSE. Choose the answer and write “true” or “false” next to the question numbers (1.2.1 to 1.2.5) in the ANSWER BOOK. Correct the statement if it is FALSE. Change the underlined word(s) to make the statement TRUE. (Do NOT simply use the word ‘NOT’ to change the statement.) NO mark will be awarded if only FALSE is written. EXAMPLES: QUESTION ANSWER The initial start-up instructions for a True computer are stored in ROM. NFC devices can connect to each other False - Bluetooth up to 10 metres apart. 1.2.1 Crowdfunding is a legal way of obtaining financial support for a project by raising contributions online from a number of people. (1) 1.2.2 A minus operator before a key word in the search bar exclude search results containing that word. (1) 1.2.3 A blog is an area in a place such as a café, hotel or airport where people can connect to the Internet via Wi-Fi-enabled devices. (1) 1.2.4 A hashtag helps others who are interested in a certain topic, quickly find content on that same topic. (1) 1.2.5 SATA is a type of interface that connects computers to monitors/data projectors. (1) TOTAL SECTION A: [15] Please turn over

Downloaded from hlayiso.com SECTION B: SYSTEMS TECHNOLOGIES QUESTION 2 2.1 The machine cycle is the main task of the CPU. The CPU continuously executes the steps in the machine cycle. These steps include: fetching instructions and data from memory and decoding the instruction. Name the other TWO steps. (2) 2.2 There is always a need for increased performance from ICT devices. 2.2.1 How does the use of a GPU increase computer performance? (1) 2.2.2 Explain what cache memory is and how it increases computer performance. (2) 2.2.3 Explain Multithreading. (2) 2.3 Computer 1: Computer 2: R9 999 R15 999 Windows 10 Home Mac OS SIERRA 15.6-inch HD Anti-Glare Display 13.3-Inch Led-Backlit Display 8GB RAM & 1TB HDD 128GB PCIE-Based SSD 10th Gen Intel Core i5 1035G1 Processor 1.8GHZ Processor 3-Cell Battery, 42WHr (Integrated) INTEL HD Graphics 6000 Intel UHD Graphics Full-Size Back-Lit Keyboard Tray load DVD 2.3.1 What is the main disadvantage of the storage device in Computer 2? (1) 2.3.2 Give TWO main functions of an operating system? (2) 2.3.3 Give an example of an open source operating system. (1) Please turn over

Downloaded from hlayiso.com 2.3.4 Computer 2 doesn’t have an optic drive. How will software be installed on the computer? (1) 2.3.5 Will the amount of RAM of computer 1 be adequate for the type of operating system installed? Motivate your answer. (2) 2.4 Teachers want to do remote teaching with the learners and still be “face-to-face”. A webcam is an important hardware component to do remote teaching. 2.4.1 One of the specifications of the webcam is that it is “Plug and Play” compatible. What is the meaning of “Plug and Play” in this context? (2) 2.4.2 There are various drivers available for the webcam. Explain what a driver is? (1) 2.5 What does the acronym SAAS stand for? (1) 2.6 Explain the concept of virtual memory. (2) 2.7 Cloud computing and virtualisation goes hand in hand. 2.7.1 Describe what cloud computing refers to. (2) 2.7.2 Name ONE disadvantage of cloud computing. (1) 2.7.3 Explain the benefit of scalability for cloud computing. (1) TOTAL SECTION B: [24] Please turn over

Downloaded from hlayiso.com SECTION C: COMMUNICATIONS AND NETWORK TECHNOLOGIES QUESTION 3 3.1 To assist learners with learning, the school has launched an enquiry into remote learning. The school decides to give learners remote control of computers at the school. 3.1.1 What is remote access? (1) 3.1.2 What is the main benefit of using a virtual private network (VPN) (1) 3.1.3 Briefly explain the concept of encryption. (2) 3.2 Advantage of using a network includes resource and file sharing. Name any other TWO network advantages. (2) 3.3 Physical aspects of a network 3.3.1 Name the topology that is used to do the setup of the network. (1) 3.3.2 When will a router be used in a network? (1) 3.3.3 What is the purpose of a switch in a network? (1) 3.4 Mobile technology is part of daily life. 3.4.1 Which technology allows voice transmission over computer networks? (1) 3.4.2 What is the main advantage of a podcast? (1) 3.4.3 Mobility and connectivity are important for some mobile offices. (a) Explain decentralisation of labour. (2) (b) State ONE device that is needed to accommodate mobility. (1) 3.5 A protocol is a standard set of rules that allow electronic devices to communicate with each other. When is FTP used? (1) Please turn over

Downloaded from hlayiso.com 3.6 Explain the following security threats and the laws that help to protect computer users. 3.6.1 Denial of service. (2) 3.6.2 The information regulator is pushing for the remaining provisions of the Protection of Personal Information (PoPI) Act. Which issue is this act addressing? (1) 3.7 You can be infected with COVID-19 by touching a contaminated surface and then touching your eyes, nose or mouth. 3.7.1 Give TWO preventive measures you can implement to curb the spread of COVID-19 when sharing ICT devices. (2) 3.7.2 Give ONE way ICT can be used by the South African government to help combat the COVID-19 break out? (1) 3.8 Give an example of invisible data capturing. (1) TOTAL SECTION C: [22] Please turn over

Downloaded from hlayiso.com SECTION D: DATA AND INFORMATION MANAGEMENT QUESTION 4 The database of a local newspaper that has been set up during the lockdown has two tables. Clientstb and Advertstb. The Clientstb-table stores the details of the clients who place adverts. The Advertstb-table stores the particulars of an advert that is placed in the local newspaper. An example of the tables and the fields, including the relationship is given below. 4.1 What is the function of a primary key. (1) 4.2 What is a relational database? (2) 4.3 Use the tables in the example above to answer the following questions. 4.3.1 Name the concept, or application of the rules to ensure correctness of the tables. (1) 4.3.2 Draw an ER diagram for the given example. (2) 4.4 The database administrator needs to ensure that the data is accurate and reliable. Give an example of how the administrator can do the following: 4.4.1 Verify that the ClientName entered into the database is correct. (1) 4.4.2 Validate the field DatePlaced (1) 4.4.3 Websites like YouTube and Facebook collects information entered by users. Name TWO types of data other than personal information that can be stored in the database of websites like these. (2) Please turn over

Downloaded from hlayiso.com 4.5 When organising data in a database, there anomalies can occur. Use the table to give examples for each of the following anomalies. 4.5.1 Insert anomaly (1) 4.5.2 Update anomaly (1) 4.5.3 Delete anomaly (1) 4.5.4 Data redundancy (1) 4.6 The editor wanted to change his password. He then received a message that the password was not strong enough. His password was HarryOne. Make TWO suggestions to improve the password. (2) 4.7 Data is stored on various cards, such as credit cards, loyalty cards and store cards when using it to buy items. 4.7.1 Give ONE disadvantage of transaction tracking. (1) 4.7.2 Give TWO types of changes that an audit trail records. (2) 4.7.3 Location based data involves producing and providing the coordinates of a person. This is an invasion of privacy when companies sell or hand over this data. In which case would such a handover of data benefit the individual? (1) TOTAL SECTION D: [20] Please turn over

Downloaded from hlayiso.com SECTION E: SOLUTION DEVELOPMENT QUESTION 5 5.1 Below is an incomplete class diagram. Answer the questions below related to this class: Employee - fEmpID - Fsurname - fName - fDateBirth - fSection CONST PartRegister = ‘ZA’ - createEmpNumber + Employee + Employee(sName, sSurname : string) + getEmpID : string + setDepartment(sDept:String) + toString:String 5.1.1 Name ONE attribute of the class. (1) 5.1.2 The createEmpNumber is a private method. Suggest ONE reason why the programmer is using a private method and not a public method. (1) 5.1.3 How will another program/program segment access the private methods of a class? (1) 5.1.4 Describe the purpose of a mutator. (1) 5.1.5 Why is it not necessary to have a mutator or accessor method for the field PartRegister? (1) 5.1.6 There are two constructors in the class. What is this method called where the program can use more than one constructor with the same name? (1) 5.1.7 Given: Procedure Employee(sName, sSurname : string) Begin … End; Complete the code for the constructor to show how the parameters will be assigned. (2) Please turn over

Downloaded from hlayiso.com 5.1.8 What is the main function of the toString method? (1) 5.1.9 Complete the Delphi statement for the getEmpID method: Result := (1) 5.2 Consider the following Delphi code related to the class definition in question 5.1. var oneObject: Employee; sName : string; iloop, ilocalCount : integer; sSurname : string; bFound : boolean; Const sAlpha = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'; begin 1. bFound := True; 2. sName := inputbox('data enter','Enter name', 'Gary'); 3. sSurname := inputbox('data enter','Enter suname', 'Golding'); 4. if length(ssurname) >= 8 then 5. begin 6. ilocalCount := 1; 7. while (ilocalCount <= length(sName)) and bFound do 8. if pos(copy(sname, ilocalCount, 1), sAlpha) = 0 then 9. bfound := false 10. else 11. inc(ilocalCount); 12. end; 13. oneObject:= Employee.create(sName,sSurname); 14. redout.lines.add(oneObject.toString); end; 5.2.1 Explain the purpose of parameters in methods. (1) 5.2.2 Clearly identify the object in the segment of code. (1) 5.2.3 The segment of code contains criteria for the name and surname. Write down the criteria for each one. (2) 5.2.4 Instead of using the WHILE loop, the developer could have used a FOR DO loop. Explain the difference between using a WHILE loop and a FOR DO loop. (2) Please turn over

Downloaded from hlayiso.com 5.3 The question that follow is based on the following code segment. The code segment produces the Fibonacci sequence, which is 1, 1, 2, 3, 5, 8, 13, 21 … var iValue1, iValue2, iAnswer : integer; sOutput : string; begin // Fibonacci sequence 1, 1, 2, 3, 5, 8, 13, 21 1) ivalue1 := 1; 2) ivalue2 := 1; 3) sOutput := inttostr(iValue1 ) + ' ' + inttostr(iValue2) + ' '; 4) while iValue1 < 3 do 5) begin 6) iAnswer := iValue1 + iValue2; 7) sOutput := sOutput + inttostr(iAnswer); 8) iValue1 := iValue2; 9) iValue2 := iAnswer; 10) end; 11) end; Complete the trace table. The trace table contains the first four (1 – 4) lines, and assignments to variables in the program. You do not need to complete any line numbers. iValue1 iValue2 ianswer sOutput iValue1 < 3 1 1 11 True (8) TOTAL SECTION E: [24] Please turn over

Downloaded from hlayiso.com SECTION F: INTEGRATED SCENARIO QUESTION 6 During the National Lockdown, it was important to be linked to the Internet. Teachers made use of apps, social media and online services to keep learners up to date. 6.1 There is a digital divide in South Africa. 6.1.1 Explain the term digital divide. (2) 6.1.2 Discuss TWO factors in education other than financial resources, that contribute to the digital divide. (2) 6.2 Data and information have been made available to learners by schools. 6.2.1 Give an example of an online storage service that can be used to share homework assignments with parents and pupils. (1) 6.2.2 Explain why an online storage service is better to use for sharing information than sending them through an e-mail to parents? (2) 6.2.3 Compare the difference in uploading and downloading speeds of the homework to the online storage space. Motivate your answer. (2) 6.2.4 Name TWO types of computer related addresses that can identify your position during a virtual lesson. (2) 6.3 People have been tested for the virus and the data is stored at a central location. 6.3.1 Give the term used for the central location where large amounts of data is stored. (1) 6.3.2 What is the process that analyzes the data in order for meaningful decisions by the Government to prolong or shorten the period of isolation? (1) 6.3.3 How can GPS help technology to keep track of the spread the virus? (2) 6.3.4 Explain how distributed computer processing can be used to find a vaccination for COVID-19? (2) 6.4 Employees worked from home by logging onto the VPN. 6.4.1 Name TWO security measures that must be set up to be able to log in and prevent unauthorized access to the network (2) 6.4.2 Name TWO software applications that can be used to access other computers remotely. (2) Please turn over

Downloaded from hlayiso.com 6.5 Businesses are targets of cyber-attacks. Explain the following threats. 6.5.1 Botnet (2) 6.5.2 Piggybacking (2) 6.6 During this time, there have been a lot of hacks and viruses on social media. 6.6.1 What does a virus-author/virus writer do? (1) 6.6.2 Explain how a Backdoor attack works. (2) 6.6.3 State TWO negative effects that cybercrime has on business. (2) 6.6.4 State TWO ways how businesses can protect them from computer crime except to keep antivirus software up to date. (2) 6.7 Social websites are misused by spreading false information about the Corona virus. 6.7.1 Provide a term for the spreading of false information. (1) 6.7.2 State TWO reasons why the government tracked people and imposed fines on them for spreading false information during the lockdown? (2) 6.8 State TWO factors that limit the effective use of ICT except education and training. (2) 6.9 Fifth-generation wireless connectivity (5G) is the next generation of cellular technology. 6.9.1 Name TWO main advantages of the next wireless standard? (2) 6.9.2 What is the main health concern regarding the installation of the next wireless technology in your neighborhood? (1) 6.10 The use of mobile applications is very popular. 6.10.1 Name TWO reasons why users prefer using mobile apps more than conventional websites. (2) 6.10.2 What is the benefit of file synchronization? (2) 6.10.3 Name ONE reason why additional code is needed to display web pages on mobile devices? (1) TOTAL SECTION F: [45] GRAND TOTAL: [150]