O-LevelComputer ScienceAutomated and emerging technologies2210/11 · May/June 2023 · Q57 Marks

A farm has an automated drinking system for its animals. The drinking system has a water bowl that contains the water. When the water bowl is empty, it is automatically refilled. The system uses a sensor and a microprocessor.

(a)Identify the most appropriate sensor for this system.[1]
(b)Describe how the sensor and the microprocessor are used to automatically refill the water bowl.[6]

Mark scheme

Marking points from the official mark scheme (May/June 2023). The mark or mark type is shown in brackets.

[1] Any one from: • Level • Pressure • Moisture
[6] Any Six from: • Sensor continually sends digitised data to microprocessor • Microprocessor compares data to stored value(s) • If value is outside range / matches microprocessor sends signal to release water to refill water bowl • ... bowl filled by set amount // bowl filled for certain time • Actuator used to release water • Whole process repeats until turned off/stopped

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Topic: Automated and emerging technologies, O-Level Computer Science (syllabus 2210). Structured question, 7 marks.
Source: O-Level Computer Science, May/June 2023 Paper 1 Variant 1, question 5.

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