Information Technology Grade 11 2016 QP & Memo

Downloaded from hlayiso.com Page 1 of 7 education Department: Education PROVINCE OF KWAZULU-NATAL 28 SEPTEMBER 2016 MARKS: 60 EXAMINER —— :M PADAYACHEE TIME: 1% Hours MODERATOR :S NAIDOO INSTRUCTIONS AND INFORMATION 1. This question paper consists of FOUR questions and 7 pages including this cover page. 2. Answer ALL the questions. 3. Read ALL the questions carefully. 4. Start EACH question on a NEW page. 5. Leave a line after each answer. 6. The mark allocation generally gives an indication of the number of facts required In your } answer. | 7. Number the answers correctly according to the numbering system used in this question \ paper. | 8. Write neatly and legibly.

Downloaded from hlayiso.com Page 2 of 7 QUESTION ONE [MATCHING] Match the description provided in column A with the term from column B that best suits the description given. Write only the letter of the term next to the question number of the description. COLUMN A | a COLUMN B 1.4. Connects devices in a small area using Infra-Red, Bluetooth and WiFi. AEMI 1.2. Signals travelling along wires may be intercepted by outsiders. “|B Backbone 1.3.A device used to join two cables. It may also amplify or boost the signal. C WLAN 1.4. When several LAN segments hang of one fibre optic cable it is called... DWiki | 1.5. The layout of computers in a network is called a ....... E Proxy Server 1.6. Set of rules that governs the way information travels from one pointto the | F RSS Feed next ina network e.g. Internet. 1.7. A unique website where users may contribute or edit articles. G Content Aggregator 1.8. Signals from machinery may corrupt signals travelling in wires. H WPAN 1.9. A website or software that collects specific information from other websites. | 1 Eavesdropping 1.10. A’server maintained by an ISP or business through which all web J Weblog — content passes. : a K Router, L_ Web Server M Repeater N_ Protocol {10] O Topology SCENARIO Your school is deciding to upgrade its current setup of computers to keep up with — modern trends. At present the school has only 3 office computers for Administration work, and 30 computers each in the IT rooms. They have also decided that the entire school should be connected to the internet by making it a HOT SPOT. The school governing body approached a company to provide a quotation showing possible costing. Study the diagram of the Company’s recommendations and help the school to: streamline the features so that they purchase the best setup at the most reasonable price. -—-—-.-.-..

Le oo Downloaded from hlayiso.com Page 3 of 7 a a « REPEATER IT ROOM LIBRARY ud SERVER <> ITROOM 4 2 dg i<—>} LocaTED 30 PC's 30 PC’s e HERE Ethernet Topology for both IT rooms Fibre opti Will be Ring Topology with CSMA/CD Cables used to connect 10 4S computers, Wireless Access point utd for Internet Lib ~ uses Token Ring QUESTION TWO_ [NETWORK AND COMMUNICATIONS TECHNOLOGIES] Due to the high cost of upgrading for the future, the Principal and the governing body have many questions. Your knowledge of computers is required to assist them to make a final decision. 2.1. Coaxial and STP cables used in the IT rooms pose three major problems due to the copper that is used in the cabling. Name and briefly describe each problem. (6) 2.2, Explain why the cabling in the library is not the best chosen. Give 2 reasons. (2) 2.3. Give two disadvantages of using the topology suggested for the IT rooms. (2) 2.4. Explain the purpose of using a switch in the IT rooms, (2) 2.5, Discuss the difference between a Repeater and a Bridge. (2) 2.6. Why is it necessary to have a router present on the premises? (2) 2.7, Do you think that the LAN technologies chosen for the IT rooms is appropriate for the suggested topologies included. Motivate why you think so. (2) 2.8. Describe how the two media access methods, mentioned in the quotation, works. (4) 2.9, What does it mean to say that the school is a HOT SPOT? (1) 2.10. Learners in the school will be allowed to use their tablets or smartphones to access the Internet, with obvious restrictions. Discuss the different technologies that may be used by the different devices under the following headings:

Page 4 of 7 Downloaded from hlayiso.com. oe a) EDGE (a) b) 4G LTE i (4) c) WiMax : (1) [26] QUESTION THREE [INTEGRTED SCENARIO] The principal of your school is not very keen on the whole school being on the internet. Answer the questions below based on some of his fears. 3.1. Give two dangers of social networking in school. (2) 3.2. During transfer of files between learners and downloading from the internet, one has to be very careful of the content received and sent. List two security measures that one can employ to keep their computer protected from unwanted content. (2) ( ) 3.3. Define the terms related to Internet usage: 3.3.1. Spam : (1) 3.3.2. Adware (1) 3.3.3, Bandwidth : (1) 3.4, What do the following acronyms stand for: ‘ 3.4.1. HTTP » (2) 3.4.3. TCP/IP (2) (44)

O) Downloaded from hlayiso.com Page 5 of 7 QUESITON FOUR [PROGRAMMING AND ALGORITHM DESIGN] The school requires software to manage the different departments of the school. You, as an IT learner, are required to assist in developing software to run the school. 4.1. The Sports department wants your assistance to develop an algorithm that uses the full name (Surname Firstname/s) of a participating athlete, to generate a Registration Number. This number is used to identify the athlete by making tags with the number printed on it. This registration number contains alphanumeric characters. Your task is to examine the already written code and give input by answering the questions: 1. procedure TForm1.Button1Click(Sender: TObject); 2. Var fName, cde : String; 3. len, mid, f,s : integer; 4. begin 5. fName := InputBox('Enter Name','Surname then firstname’,"); 6. len := Length(fName); 7. mid := len div 2; 8. if odd(len) then 9. begin 10. mid := mid + 4; 11. cde := copy(fName,1,1) + copy(fName,mid,1) + copy(fName,len-2); 12. end 13. else 14. cde := copy(fName,mid,1) + copy(fName,mid+1,1) + copy(fName,len-1); 15. f:=len div 10; 16. s:=len mod 10; 17. cde := IntToStr(f) + cde + IntToStr(s); 18, RichEdit1.Lines.Add(cde); 19. end; 4.1.1. Trace the code to determine the registration number formed when the input is: (N.B. No trace table is required as marks will only be awarded for output) a) Jonathan Francis (2) b) Hlakanipho Duma (2) c) Tony Cho (2) 4.1.2. Describe in not more than SEVEN steps exactly what is being done with the input to obtain the desired registration code. (7) 4.1.3, You need to modify the program so that it removes spaces found in the reg no. formed. Write the Delphi statements to solve this problem. At which line would you insert the new statements. (6)

Downloaded from hlayiso.com: age 6 of 4.2. The Library needs to create a database in order to store the details of all members. Software developers have agreed on the details necessary to construct the respective record. Your task is to continue with the completion of the a software as specified by the questions that may follow: THE RECORD STRUCTURE Here is a list of fields that constitutes the record. The record represents the details of all library members. . 1. A Boolean variable (Learner) to represent whether a member is a learner or not. If not a learner, the member could be an educator or any other staff member in the school. 2. A string variable called RegNo that will store a code generated by the members full name. 3. A real variable called fines, that stores the total fines, if any, owed by the member. 4, A String variable, fName, that stores the full name of the member. 4.2.1, Declare the object type for the class variables above. To do this you must only write’ the segment of the code that defines the instance variables. The name of the object type is LibMem. : : (3) ( ) 4.3. Study the class diagram which represents the object class for the record structure above and answer the questions based on it. CLASS DIAGRAM LibMem - Learner : Booleanr; ~ Rego: string fines: real; Lname : String; Constructor Create; Overloaded: Constructor Create(pL: char; pName:String:); Overloaded; getLearner : Boolean; getLName : Real setName(pn:String;); calcAmtOwing(amnt : real; days: integer; charge:real): toString : string: C i tee EHH Sl 4.3.1. Clearly distinguish between a class and an object. ‘ (2) 4.3.2. The class diagram has various methods. Identify the three different types of methods from the class and give an example of each from the diagram. (6) 4.3.3, From the class diagram identify the following: ~~ =~ ay The parametrised constructor, = eg b) A Mutator method (1) c) An Accessor method (1)

Downloaded from hlayiso.com Page 7 of 7 4.4, Discuss the prupose of accessors and mutators. (2) 4.5. How do procedures differ from functions? (2) 4.6, List the two auxillary methods methods from the class diagram. {2) 4.7. You need to redefine the auxillary method below : calcAmtOwing(amnt : real; days: integer; charge:real); So that the value of amnt changes in the calling statement of the method. (1) e 4.7.1, What kind of parameter have you transformed amt into in 4.7.? (1) 4.7.2. What is the name given to the parameters found in the: a) Method calling statement e.g. calcAmtOwing(a,d,c); (1) b) Method definition e.g. calcAmtOwing(Var amnt : real; days: integer; charge:real); (1) [43] FINAL TOTAL : 90 +3 x 2 = 60

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Downloaded from hlayiso.com Page 3 of 4 JUIESTION FOUR 41.1. 2) inisé b) 1HpumaS ©) Oy ho& 4.1.2. Step 1—the length of the full is found and checked if it is odd or even. Step 2—if odd, then the first letter, middle letter and the last 3 letters are joined Step 3 - if even, the 2 middle chars and the last 2 letters are joined Step 4—then the digits of ‘the length of the string is separated 4.1.3. ..newCde =”, for i:=1to length{cde) do Begin If not (cde[i} =‘) then newCde := newCde + cdefi] End; Cde := newCde; 4.2.4, Type LibMem = Class(TObject) Private Learner : Boolean; RegNo : String; ies : real; fName : String; Public End; | if Page 4.0f4 | 1 i | 431 | Aclass is subprogram that contains methods objects and variables. I conteins attributes that pertain to a particular object. An object is an instance of a class. It inherits class attributes and member variables. 4.3.2. Constructor : Constructor Create; Overloaded; Constructor Create(pL: char; pName:: String; ; Overloaded; i Accessor : getlearner , getLName i Mutator - setName. Auxillary methods : calcAmtCwing , toString 4,3.3, a) Constructor Create(pL: char; pName:String;); Overloaded; b) setName | c) getLearner , GetLName 4.4. Accessors — gets values out of the class. | Mutators — sets the values of the class attributes or changes the class variables. 4.5. Procedures does not return any values back to the calling statement. Functions are of a specific type and they return values back'to the cal g statements. 4.6. toString and calcAmtOwing 4,7, calcAmtOwing(Var amnt : real; days: integer; charge:real}; \ 4.7.1. A reference parameter or a variable parameter i 4.7.2. a) Actual parameters or arguments b) Formal Parameters. i