Href":"/gcse/computer-science/edexcel/questions","basePath":"/gcse/computer-science/edexcel/hardware/questions","formulaUrl":null,"initialIndex":87,"initialQuestionWindow":[{"id":"e0df6b6f-8d06-4106-aa7f-fd31224afad7","revisionId":"50337301-49bb-4319-a26c-05a1cf7b6eca","questionNumber":null,"questionType":"LA","specification":"To prevent disease transmission, a commercial poultry farm uses an automated bio-security disinfection portal at its entry boundary.\n\n![An automated vehicle disinfection portal.](https://assets.mathsgenie.co.uk/aqa-qb/bc8e38d1-e846-4d45-9343-59f025c4bbe5.png)\n\nThe portal control system consists of:\n* An ultrasonic distance sensor to detect an approaching vehicle.\n* An RFID transponder reader to read the unique ID tag mounted on the vehicle's windshield.\n* A local database of approved delivery contractors with valid sanitation clearance.\n* An actuator connected to a solenoid valve that controls the high-pressure disinfectant spray nozzles.","difficulty":4,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"cbfd2fa9-52db-4efd-bdb6-6d1a2cce041b","label":null,"content":"Describe what the control system does when the ultrasonic distance sensor detects an arriving vehicle.","markscheme":"- The activation of the ultrasonic sensor triggers the RFID reader to scan the windshield transponder to retrieve the vehicle's unique ID tag. B1\n- The control system queries the local database with this ID; if a matching cleared contractor is found, a signal is sent to the solenoid valve's actuator to open the valve and initiate the chemical spray. B1","marks":2,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"e265970b-0332-4697-8854-b11d0b7592b4","revisionId":"be9e5fed-6f78-430e-a785-fc608dcd5341","questionNumber":null,"questionType":"LA","specification":"An autonomous deep-sea research submersible utilizes an onboard microcontroller to manage its buoyancy and navigation systems.","difficulty":3,"difficultyBand":"easy","totalMarks":1,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"52e30990-3189-43c1-a45f-c3a1701127b6","label":null,"content":"State one reason why the submersible's primary initialization instructions (the bootstrap loader) must be stored in Read-Only Memory (ROM) rather than Random Access Memory (RAM).","markscheme":"- States that ROM is non-volatile (retaining its data when the submersible's power is switched off, unlike volatile RAM) OR that ROM is read-only (preventing the critical startup instructions from being accidentally overwritten, deleted, or corrupted by other software). B1","marks":1,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"f0dac690-47aa-47af-9874-bcf79345db65","revisionId":"73b1db8e-ba6b-4404-a7df-5629fda92607","questionNumber":null,"questionType":"LA","specification":"An autonomous marine research drone utilizes a dedicated micro-controller subsystem specifically to manage the inflation and deflation of its ballast tanks to maintain a constant depth.","difficulty":3,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"a8a81bd5-06d2-41da-a9de-19df0076e97c","label":null,"content":"State **two** hardware or operational characteristics of this buoyancy control subsystem that classify it as an embedded system rather than a general-purpose computer system.","markscheme":"- Designed to perform a single, highly specific task (managing buoyancy/depth) rather than running multiple general-purpose applications B1\n- Has minimal or no direct user interface (such as a keyboard, mouse, or standard operating system GUI), relying instead on sensor inputs and actuator outputs B1\n- Operates under strict power and physical space constraints, using low-power hardware to run continuously from battery/solar power B1\n- Program code is stor

Hardware

Question 54

Hardware Questions

Hardware

Question 54

Hardware Questions