Information Technology 9626/12 March 2022 | Cambridge AS Level Past Papers With Mark Scheme

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### Key and Important Topics:
1. Data vs. Information | Defining data and explaining why a collection of raw values is not considered information until it is processed meaningfully.

2. System Software - Interpreters | How interpreters function in executing code, including line-by-line processing and error detection.

3. Mainframe Computers in Transaction Processing | Features of transaction processing systems and the advantages/disadvantages of using mainframe computers.

4. Weather Data Collection | Methods of collecting analog atmospheric variables, conversion to digital data, and processing for meteorological analysis.

5. Expert Systems and Forward Chaining | Explanation of forward chaining in artificial intelligence and its application in decision-making systems.

6. Database Validation and Verification | Different types of validation checks (e.g., format check, length check) and the necessity of verification for accuracy.

7. Pseudocode for Averaging a Set of Numbers | Writing a structured algorithm using `REPEAT...UNTIL` loops to compute the mean of a dataset.

8. Phishing Prevention Methods | Evaluating techniques such as email filtering, two-factor authentication, and user awareness training.

9. Spyware and Cyber Fraud | Understanding how spyware works, how hackers use stolen data, and preventive security measures.

10. Database Relationships | Defining one-to-one, one-to-many, and compound keys, and explaining how to implement many-to-many relationships in a database.

CIE AS & A Level Information Technology (9626) Mar 2022

Laura Bellini

Classification: Paper 1

Page count: 12

Viewed: 64

Last update: 2 months ago

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