AS & A Level Information Technology (9626) — October–November 2023, Paper 11

(a) Describe the features and the role of a primary key in a database.

Two methods of checking the accuracy of data are validation and verification. Describe the differences between validation and verification.

Companies have the choice of using custom written software or using off-the-shelf software. Explain the differences between custom written software and off-the-shelf software in…

Explain how HTTPS websites provide security of data.

Compare static parameter queries with dynamic parameter queries. You must include similarities and differences.

Most control technology systems use actuators and sensors. (a) Describe the purpose of an actuator.

A company employs workers as: - labourers who are paid $18 per hour - office workers who are paid $22 per hour - managers who are paid $30 per hour. A computer programmer has…

Explain what is meant by the term 'data driven' within the context of expert systems.

Computer models are often used to run simulations when designing a nuclear power plant. (a) Describe the benefits of using simulations in this scenario.

A school stores all the records of its students in alphabetical order. Records could be found using sequential access. (a) Explain what is meant by sequential access.

A company receives orders which are entered into a computer system. The company has decided to use online processing to process these orders so employees enter orders as they are…

Analyse the effectiveness of supercomputers.