9626_w22_qp_32 - revisedeck

9626_w22_qp_32

A paper of Information Technology, 9626

Questions:

10

Year:

2022

Paper:

3

Variant:

2

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1

Data can be sent over computer networks and the internet using tunneling. Give two reasons why tunneling is used for sending data. Describe how tunneling transfers data over the internet.

14. Communications technology → 14.5. Data transmission across networks

14. Communications technology → 14.6. Network protocols

Open

2

Data mining is used by health care organisations to analyse large amounts of patient data. Explain why health care organisations use data mining to analyse their patient data.

12. IT in society → 12.2. Data mining

Open

3

Explain how an FTP server carries out its role in a computer network.

14. Communications technology → 14.3. Network servers

14. Communications technology → 14.6. Network protocols

Open

4

Mobile devices can use Near Field Communication (NFC) and Bluetooth to exchange data. Describe three uses of NFC in mobile devices. Discuss the differences between NFC and Bluetooth when used for exchanging data between mobile devices.

14. Communications technology → 14.7. Wireless technology

14. Communications technology → 14.8. Mobile communication systems

Open

5

A scientist requires a new computer system to help with her research into climate change. A systems analyst will use document analysis to investigate the existing computer system. Evaluate the use of document analysis in this scenario.

16. System life cycle → 16.2. Analysis

16. System life cycle → 16.7. Evaluation

2. Hardware and software → 2.2. System software

Open

6

A company designs and manages the construction of buildings. It has a client-server network for use by its designers and project managers so that they have access to the software resources they require. Justify the use of the client-server model of networking in the company.

14. Communications technology → 14.3. Network servers

14. Communications technology → 14.1. Networks

Open

7

A software developer uses prototyping when creating a new app for smartphones. Describe the use of prototyping during the development of the app. Compare throw-away prototyping with evolutionary prototyping for creating the new app.

16. System life cycle → 16.9. Prototyping

16. System life cycle → 16.4. Development and testing

Open

8

Draw the correct symbol around each of the elements shown in the DFD in . One element, Teacher, has been done for you. Draw the correct symbols on this DFD: Teacher Student Administrator Calculate College Grade Calculate Class Grade Class Grade files Student files

16. System life cycle → 16.3. Design

Open

9

A programmer is writing some JavaScript code to display this text on a web page: This is “Cambridge International IT 9626 Paper 3” The programmer uses strings in the code. Describe the purpose of strings in JavaScript. The programmer’s first attempt at the HTML and JavaScript code is shown in . Line numbers are shown only for your use when referring to the code. This is "Cambridge Assessment International Education" var x = "This is "Cambridge International IT 9626 Paper 3""; document.getElementById("string").innerHTML = x; When run in a web browser the HTML code outputs the heading in line 5 on the page. The browser executes the JavaScript code shown in lines 9 to 12. The expected output of the code on the web page is shown in but the actual output is shown in . Explain why the error in line 10 prevents the JavaScript code from outputting: This is “Cambridge International IT 9626 Paper 3” JavaScript programmers often wish to control when sections of their code are executed. Compare the use of setTimeout() and setInterval() for delaying the execution of JavaScript code. Please turn over for Question 10.

21. Programming for the web → 21.1. Programming for the web

Open

10

Image editing software has tools for altering digital images. Explain why a graphic designer might use each of the following tools to alter a digital image. layer tool flatten tool

19. Graphics creation → 19.1. Common graphics skills

19. Graphics creation → 19.3. Bitmap images

Open