9626_s23_qp_13 - revisedeck

9626_s23_qp_13

A paper of Information Technology, 9626

Questions:

11

Year:

2023

Paper:

1

Variant:

3

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1

Describe what is involved in data logging.

1. Data processing and information → 1.1. Data and information

5. eSecurity → 5.1. Personal data

17. Data Analysis and Visualisation → 17.1. Data Analysis and Visualisation

Open

2

Explain the purpose of the SSL/TLS protocol.

1. Data processing and information → 1.3. Encryption

14. Communications technology → 14.6. Network protocols

Open

3

There are different types of processing including batch processing and real-time processing. Without referring to master files and transaction files, describe what is meant by batch processing. Rocket guidance systems are used in space exploration. Explain why a rocket guidance system is an example of the use of real-time processing.

1. Data processing and information → 1.5. Data processing

Open

4

One of the functions of an operating system is to maintain the security of a computer system. Describe the other functions of an operating system.

2. Hardware and software → 2.2. System software

10. Database and file concepts → 10.4. File and data management

Open

5

Justify the use of Information Technology for monitoring the environment.

3. Monitoring and control → 3.1. Monitoring and measurement technologies

12. IT in society → 12.4. The impact of IT

16. System life cycle → 16.7. Evaluation

Open

6

A computer-controlled traffic light system controls the flow of motor vehicles and pedestrians. Describe the inputs, processing and outputs involved in this system.

1. Data processing and information → 1.5. Data processing

3. Monitoring and control → 3.2. Control technologies

16. System life cycle → 16.3. Design

Open

7

Explain the reasons for the digital divide between the old and the young.

6. The digital divide → 6.1. The digital divide

Open

8

Spyware is a type of malware. Describe the consequences to the individual of the use of spyware on their computer.

5. eSecurity → 5.2. Malware

Open

9

Discuss the advantages and disadvantages of using a gesture-based user interface rather than a graphical user interface to control devices.

2. Hardware and software → 2.5. User interfaces

Open

10

An expert system is being trialled for use as part of a study on animal identification. It has been set the following task. The goal is to decide the colour of a bird named Hortense. Two facts are provided: • she sings • she is 15 cm tall. The rule base contains the following three rules: • IF X is an ostrich – THEN X has a long neck • IF X sings and X is 15 cm tall – THEN X is a canary • IF X is a canary – THEN X is yellow The inference engine has concluded that Hortense is yellow. It has taken the facts as data and used the rules base to decide: Hortense is a canary Hortense is yellow Identify which type of chaining the inference engine used. Explain the reasoning the inference engine used.

7. Expert systems → 7.1. Expert systems

Open

11

In Ruritania these are the tax rules. • People who earn up to $10 000 pay no tax. • People who earn between $10 000 and $40 000 pay 20% tax on their earnings above $10 000. • People who earn more than $40 000: pay $6 000 ($30 000 × 20%) and pay 40% tax on their earnings above $40 000. Complete this flowchart which shows how the net wage (the money earned after tax is paid) is calculated and is output for an individual in Ruritania.

Open