AS & A Level Information Technology (9626) — October–November 2024, Paper 11

Utility software is needed to maintain a computer system. Explain why each of the following tasks is needed and how utility software performs each task: disk formatting.

Describe the following characteristics of mainframe computers: volume of input, output and throughput.

Describe how a company can use management information system (MIS) software to help run its business.

Relationships are used in relational databases. Describe the following database relationships: (i) one-to-one; (ii) one-to-many.

A scientist is going to use direct and indirect data sources to study the effects pollution is having on farmland. Explain what is meant by direct data sources. Your answer must…

Explain the need for both validation and verification to ensure data is accurate.

Discuss the benefits and drawbacks of the use of a compiler to convert a computer program in a high level language into a low level language.

Describe the purpose of three sensors that are needed in a microprocessor-controlled burglar alarm system.

A computerised system will be used to collect and monitor environmental data in mountainous areas. Evaluate the use of monitoring technologies in this scenario.

A garage uses an expert system to diagnose faults in car engines. Describe the components of this expert system.

Describe the effects of the different methods of compression on audio quality.