fy;tpg; nghjj; juhjug; gj;jpu (cah; ju ) Kd;Ndhbg; gupl;ir> 2013 A+iy General Certificate of Education (Advanced Level)Pre Examination, 2013 July

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1 L/2013/20-E-II KOg;gjpg;GupikilaJ] ll Rights Reserved] khfhzf; fy;tpj; jpizf;fsk;>tlkhfhzk; Provincial Department of Education, Northern Province khfhzf; fy;tpj; Provincial Department of Education, Northern Province khfhzf; fy;tpj jpizf;fsk;>tlkhfhzk; Provincial Department of Education, Northern Province khfhzf; fy;tpj; Provincial Department of Education, Northern Province khfhzf; fy;tpj jpizf;fsk;>tlkhfhzk; khfhzf; fy;tpj; Provincial Department of Education, Northern Province khfhzf; jpizf;fsk;>tlkhfhzk; fy;tpj; jpizf;fsk;>tlkhfhzk; Provincial Department of Education, Northern Province khfhzf; fy;tpj jpizf;fsk;>tlkhfhzk; Provincial Department of Education, Northern Province khfhzf; fy;tpj; jpizf;fsk;>tlkhfhzk; Provincial Department of Education, Northern Province khfhzf; fy;tpj jpizf;fsk;>tlkhfhzk; Provincial Provincial Department of Education, Department Northern Provincekhfhzf; of fy;tpj; Education, jpizf;fsk;>tlkhfhzk; Northern Provincial Department Province 20 E II of Education, Northern Province khfhzf; fy;tpj jpizf;fsk;>tlkhfhzk; Provincial Department of Education, Northern Province khfhzf; fy;tpj; jpizf;fsk;>tlkhfhzk; Provincial Department of Education, Northern Province khfhzf; fy;tpj fy;tpg; nghjj; juhjug; gj;jpu (cah; ju ) Kd;Ndhbg; gupl;ir> iy General Certificate of Education (dvanced Level)Pre Examination, 2013 July jfty; njhlh;ghly; njhopdl;gtpay; II Information & Communication Technology II %d;wkzpj;jpahyk; Three Hours jfty; njhlh;ghly; njhopdl;gtpay; II Index No: Important: This question paper comprises of two parts, Part and Part B. The time allotted for Both parts is three hours. Use of calculators is not allowed. PRT Structured Essay: nswer all the questions on this paper itself. Write your answers in the space provided for each question. Note that the space provided is sufficient for your answers and that ex extensive answers are not expected. PRT B Essay: For Examiner s Use Only For the second paper Part Question Nos. Marks warded B Total This part contains six questions, of which, four are to be answered. Use the papers supplied for this purpose. t the end of the time allotted for this paper, tie the two parts together so that Part is on top of Part B before handing them over to the Supervisor. You are permitted to remove only Part B of the question paper from the Examination Hall. In numbers In words Marking Examiner 1 Marking Examiner 2 Marks checked by Supervised by Final Marks Code Numbers [ see page two 1

2 Part Structured Essay nswer all the four questions on this paper itself 01. a) Describe the term Single user-single task operating system and give one example for it b) Define the term Garbage collection in memory management of the operating system. c) State the technological differences between 2 nd and 4 th generation computers and mention two advantages of 4 th generation computers. d) What do you mean by the terms Copyright and Plagiarism? 02. a) What does CSM/CD protocol do in the context of Local rea Network? 2 [ see page three

3 b) Compare the protocols such as TCP and UDP according to reliability and connection. Protocol Reliability Connection TCP UDP c) Tick the appropriate cell(s) in the table given in the answer box according to the layer in which the services indicated in the first column operate. (Layer1 & Layer7 represent respectively physical layer & application layer of OSI network reference model). Services Layer1 Layer2 Layer3 Layer4 Layer5 Layer6 Layer7 1. Hub 2. FTP 3. Error detection & correction 4. Hardware addressing 5. IP addressing d) Consider School as a system. Write down for the followings. Content Explanation Goal Inputs Processing Outputs 03. Consider the following XML document. <?xml version= 1.0?> <address> </address > <name> Nimal </name> <no> 24</no> <street>1st Lane </street> <city> Colombo </city> <country> Sri Lanka </country> a) Write down the XML declaration in this document. b) Write down the name of the root element of this XML document? 3 [ see page four

4 c) What does XML do? d) The purposes of HTML and XML are different in web development. Write down one similarity between them. 04. a) relational database stores data about examination results. n extract from the database is shown below. StudentID StudentName ExamID ExamName ExamBoard ExamBoard Grade S111 Vimal C12 P14 Chemistry Physics BC BC C S333 Najeem B12 P14 ICT Physics E02 XYZ BC B S222 Pieris B12 P14 C12 ICT Physics Chemistry E02 XYZ BC BC B b) Explain what is meant by: i. primary key ii. composite key iii. foreign key. c) Identify two benefits of database normalization. d) Normalize the data in the table given above to 3NF, and write down the relationships among relations in schema form. 4 [ see page five

5 Part B -Essay nswer any four questions only 01. a) i. Computer storage devices can be categorized into three types based on the medium used to store/retrieve data. State the three types of media and give an example for each type. ii. SRM is most suitable to be used for register and cache memories. Give reasons. b) Consider the following scenario. You are given the task of designing a flame detection logic circuit for a toxic waste incinerator. The intense heat of the fire is intended to neutralize the toxicity of the waste introduced into the incinerator. Thermal (detection of high temperature) flame detection system and three sensors are used. Each sensor comes equipped with a normally-open contact (open if no flame, closed if flame detected), which you will use to activate the inputs of a logic system. Your task is to design the circuitry of the logic system to open the waste valve if and only if there is good flame proven by the sensors. strategy that would meet both needs would be a two out of three sensor logic, whereby the waste valve is opened if at least two out of the three sensors show good flame. The following table assigns Boolean values for the above scenario. Condition / functionality Boolean value Sensors show good flame 1 Sensors do not show good flame 0 Waste valve opened 1 Waste valve closed 0 i. Construct a truth table for this system ii. Write down the standard SOP Boolean expression from the truth table obtained in (i) iii. Draw a combined gates to represent the truth table obtained in (i) (Use only ND, OR, and NOT gates). iv. Simplify the Boolean expression obtained in (ii) by using Karnaugh map or Boolean Laws. 5 [ see page six

02. a) Write down the explanation of the following HTML elements. i. br ii. img iii. a b) Consider the following figure which shows a section of a web page of Wasgamuwa National Park.

6 02. a) Write down the explanation of the following HTML elements. i. br ii. img iii. a b) Consider the following figure which shows a section of a web page of Wasgamuwa National Park. Write down full HTML / CSS code to produce the above web page. ssume that the name of the image file is bird.jpg. The link Wasgamuwa National Park should link to the site and Border mentioned by is defined by CSS. 03. a) Suppose you have been asked to design a computer network with Internet services to an office of 50 staff with the following limitations: ll the staffs have individual desktop PCs. Only the executive staff of 10 will have access to both and web services. ll the staffs need access to . Mail and web services are provided by an ISP. The system must provide an adequate level of networks security from external threats. i) State the basic network devices that you will require for the network and briefly explain the major functions of these devices. ii) Draw a diagram to show the interconnectivity among devices. iii) Suggest a technique by which you can provide a few of the staff with both and web access while all the others are served with only. 6 [ see page seven

7 b) ssume that you are given a full block of IP addresses from to You are required to subnet this block into at least 5 subnets each able to support a maximum number of hosts. i) What is the subnet mask of this network? ii) Give the start and the end IP address of each subnet. 04. Consider the following scenario. company manages many projects. project contains ProjectNumber, and ProjectName. Each project requires the services of many employees. n employee may be assigned to several different projects. Employee contains EmployeeNumber, First Name,Last Name, and JobClassification. n employee is assigned to a project for specified hours. This job classification determines the hourly billing rate. The hourly billing rate is dependent on the employee s position. Many employees can have the same job classification. The administration wants to maintain these particulars in a digital database. a) Identify all the entities identified in this scenario. b) Draw an E-R diagram for this scenario (mark all the relationship types on the diagram). c) n employee is assigned to a project for specified hours. What is descriptive attribute? Explain your answer by using the E-R diagram drawn in (b). d) Briefly explain how many-to-many relationship, in this scenario, can be removed. e) Convert all the relations in 3 rd Normal Form (3NF) and state the answer in the form of schema. 05. a) Write down the short notes on the followings i) Compiler ii) Third Generation computer programming language b) Consider the following python program. def test(alist, item): first = 0 last = len(alist)-1 found = false while first<=last and not found: midpoint = (first + last)//2 if alist[midpoint] == item: found = True else: if item <alist[midpoint]: last = midpoint-1 else: first = midpoint+1 return found testlist = [1,4,6,3,7] print (test(testlist, 3)) 7 [ see page eight

8 i) Write down the control structures used in the given program ii) What is the searching technique used in this program? iii) Write down the output after executing this program. iv) If the line print (test(testlist,3)) is changed to print (test(testlist,5)), write down the output. 06. a) What is the difference between business-to-business (B2B) and business-to-consumer (B2C) electronic commerce? b) What are two advantages of electronic commerce for a customer over traditional commerce? c) Write down two possible drawbacks of electronic commerce. d) Give two advantages of using shopping cart software in e-commerce web site. e) Define the term Web portal. *** 8 [ End

G.C.E. (A/L) Examination June 2015 Conducted by Field Work Center, Thondaimanaru.

G.C.E. (A/L) Examination June 2015 Conducted by Field Work Center, Thondaimanaru. In Collaboration with the Zonal Education Office, Jaffna Information & Communication Technology (ICT) Grade - 13 (A/L)