9626_w21_qp_31 - revisedeck

9626_w21_qp_31

A paper of Information Technology, 9626

Questions:

12

Year:

2021

Paper:

3

Variant:

1

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1

A company wants to use an online questionnaire to get feedback from customers about the medicine it makes. Describe the features of online questionnaires that make them suitable for gathering feedback from customers. Describe two drawbacks of using online questionnaires to gather feedback.

16. System life cycle → 16.7. Evaluation

2. Hardware and software → 2.4. Custom-written software and off-the-shelf software

Open

2

QR codes are two-dimensional bar codes (matrix bar codes) representing information about items to which they are attached. An example of a QR code is shown: Describe the functional elements of a QR code. Explain why damaged QR codes may still be read while damaged one-dimensional bar codes often cannot be read.

Open

3

Peer-to-peer networking can account for a large percentage of all internet traffic. It is often used to transfer large files. Describe how peer-to-peer networking uses BitTorrent to transfer large data files between several users. Describe how the use of BitTorrent for peer-to-peer networking can cause security issues to arise.

14. Communications technology → 14.5. Data transmission across networks

14. Communications technology → 14.1. Networks

Open

4

A car manufacturer is using computer-aided design (CAD) to design the engine for its new electric car. Discuss the benefits and drawbacks of the use of CAD for this process.

16. System life cycle → 16.9. Prototyping

13. New and emerging technologies → 13.1. New and emerging technologies

Open

5

Discuss the advantages and disadvantages of using satellite communication systems to provide data transfer connections.

14. Communications technology → 14.8. Mobile communication systems

14. Communications technology → 14.5. Data transmission across networks

14. Communications technology → 14.1. Networks

Open

6

Digital currencies, such as Bitcoin and Litecoin, can be used to pay for goods and services. Analyse the effectiveness of digital currencies as a method of payment.

12. IT in society → 12.1. Digital currencies

Open

7

Web-conferencing is used to enable people to work together to produce documents. Describe, in detail, the hardware that is required for web-conferencing. Describe the features of web-conferencing software.

14. Communications technology → 14.6. Network protocols

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

Open

8

A new software application, which consists of many modules, is being developed. Testing is an important stage in the development of new software. Compare and contrast alpha testing and beta testing.

16. System life cycle → 16.4. Development and testing

Open

9

Gantt charts are used in project management. Describe the features of a Gantt chart.

15. Project management → 15.3. Tools and techniques for project management tasks

8. Spreadsheets → 8.4. Graphs and charts

Open

10

JavaScript is an interpreted language that can be used on web pages. Runtime errors, called exceptions, can occur during the execution of JavaScript code. Explain how exceptions can be handled during the execution of JavaScript code.

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

Open

11

Images of the faces of people can be manipulated and changed by morphing. Describe how morphing could be used to change an image of a sad face into a smiling face.

Open

12

Describe how augmented reality could be used by firefighters.

Open