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Both work together to form a complete computer system."},{"text":"A computer system combines hardware and data.","correct":false,"explanation":"Data is processed or stored by a computer, but it does not replace software. A computer system combines physical hardware with software containing programs and instructions."},{"text":"A computer system combines input and software.","correct":false,"explanation":"Input is information supplied to a system, not one of its two main component categories. A computer system combines hardware and software."},{"text":"A computer system combines firmware and networking.","correct":false,"explanation":"Firmware is a type of software, while networking is a way computers communicate. The two fundamental parts of a computer system are hardware and software."}]},{"id":"f4a90f1d-74a7-4f65-a08e-c447c18d270d","cardType":"basic","points":1,"front":"A processor, memory chip, sensor or motor is which type of computer-system component?","back":"A hardware component.","mcqOptions":[{"text":"A hardware component.","correct":true,"explanation":"Processors, memory chips, sensors and motors are physical parts that can be touched, so each is classified as a hardware component."},{"text":"A software component.","correct":false,"explanation":"Software consists of programs and instructions rather than physical parts. A processor, memory chip, sensor or motor is therefore a hardware component."},{"text":"A data component.","correct":false,"explanation":"Data is information that a computer stores or processes, not a physical component. These tangible electronic or mechanical parts are hardware components."},{"text":"A network component.","correct":false,"explanation":"Network components specifically enable communication between devices, whereas processors, memory chips, sensors and motors are classified more generally as hardware components."}]},{"id":"ad01c55e-1470-4c2f-b954-1a6572faf138","cardType":"cloze","points":null,"front":"A general-purpose computer is designed for [ ], not one fixed task.","back":"A general-purpose computer is designed for many different tasks, not one fixed task.","mcqOptions":[{"text":"many different tasks","correct":true,"explanation":"A general-purpose computer can run varied software and perform many different tasks, such as browsing, gaming, word processing and creating presentations."},{"text":"one fixed task","correct":false,"explanation":"Performing one fixed task describes a dedicated or embedded system. A general-purpose computer is designed to perform many different tasks by running different software."},{"text":"hardware control only","correct":false,"explanation":"General-purpose computers are not restricted to controlling hardware. They can run many kinds of software and are therefore designed for many different tasks."},{"text":"a single device","correct":false,"explanation":"A general-purpose computer is not defined by serving a single device. It is designed to run different programs and complete many different tasks."}]},{"id":"45515e5e-4b64-4cea-9fe7-9d75cfa1b8b0","cardType":"basic","points":1,"front":"A laptop can run browsers, games and office apps. What type of computer system is it?","back":"A general-purpose computer.","mcqOptions":[{"text":"A general-purpose computer.","correct":true,"explanation":"A laptop can run many different applications and perform varied tasks, so it is classified as a general-purpose computer rather than a dedicated system."},{"text":"An embedded system.","correct":false,"explanation":"An embedded system is built into another device for a specific task. A laptop runs many unrelated applications, making it a general-purpose computer."},{"text":"A dedicated computer.","correct":false,"explanation":"A dedicated computer is designed mainly for one particular function. A laptop performs many tasks by running different applications, so it is general-purpose."},{"text":"A control system.","correct":false,"explanation":"A control system manages the operation of another system or device. A laptop instead supports many unrelated applications, so it is a general-purpose computer."}]},{"id":"6943d321-79ef-47a1-b7d7-59eab01423a3","cardType":"cloze","points":null,"front":"An embedded system is [ ] and designed for a [ ].","back":"An embedded system is built into another device and designed for a specific task.","mcqOptions":[{"text":"An embedded system is built into another device and designed for a specific task.","correct":true,"explanation":"An embedded system forms part of a larger device and runs software intended for a particular function, rather than supporting many unrelated tasks."},{"text":"An embedded system is built into another device and designed for a range of tasks.","correct":false,"explanation":"Being built into another device is correct, but performing a range of tasks describes a general-purpose computer. An embedded system performs a specific task."},{"text":"An embedded system is connected to another device and designed for a specific task.","correct":false,"explanation":"Merely connecting to another device does not make a system embedded. It must be built into another device and designed for a specific task."},{"text":"An embedded system is built as a separate computer and designed for a range of tasks.","correct":false,"explanation":"A separate computer performing varied tasks is general-purpose, not embedded. An embedded system is built into another device to carry out a specific task."}]},{"id":"09d10507-e621-4237-bed9-2191b2e1ec99","cardType":"basic","points":2,"front":"Why is a microwave oven an embedded system?","back":"It has a built-in computer system that controls cooking.","mcqOptions":[{"text":"It has a built-in computer system that controls cooking.","correct":true,"explanation":"The microwave contains a computer system that processes user inputs and sensor data to control cooking time, power and other specific functions."},{"text":"It has a built-in computer system that only displays the time.","correct":false,"explanation":"Displaying the time alone does not explain the microwave’s embedded control function. Its built-in computer processes inputs and controls the cooking process."},{"text":"It has a mechanical timer system that requires manual control.","correct":false,"explanation":"A purely mechanical timer would not make the microwave an embedded system. It is embedded because a built-in computer system automatically controls cooking."},{"text":"It has an internet connection that runs many applications.","correct":false,"explanation":"Internet access and varied applications are not required for an embedded system. A microwave qualifies because its built-in computer controls the specific task of cooking."}]},{"id":"e09a50c5-3ca7-4731-9532-c727c4cda873","cardType":"basic","points":2,"front":"Why are buttons and a display alone not enough to prove a device is embedded?","back":"It must process input and control output for a specific purpose.","mcqOptions":[{"text":"It must process input and control output for a specific purpose.","correct":true,"explanation":"Buttons and displays are merely interface components. An embedded system must process inputs and use the results to control outputs for its intended purpose."},{"text":"It must receive electrical power and show information to the user.","correct":false,"explanation":"Many ordinary electronic devices receive power and display information without containing an embedded computer. The system must process input and control output for a specific purpose."},{"text":"It must contain a screen and use electronic buttons for control.","correct":false,"explanation":"Screens and electronic buttons do not prove that a computer is processing information. An embedded system processes input and controls output for a specific purpose."},{"text":"It must connect to the internet and store user files for later use.","correct":false,"explanation":"Internet access and file storage are not defining features of embedded systems. The key requirement is processing input and controlling output for a specific purpose."}]},{"id":"71c95be8-1ce4-4f61-8142-8526fc4da093","cardType":"basic","points":1,"front":"What specific job does an embedded system in traffic lights perform?","back":"It controls the sequence of lights.","mcqOptions":[{"text":"It controls the sequence of lights.","correct":true,"explanation":"The embedded system switches the red, amber and green lights in a programmed sequence, coordinating traffic flow and helping road users move safely."},{"text":"It controls the speed of vehicles.","correct":false,"explanation":"Traffic lights signal when vehicles should stop or proceed, but they do not directly control vehicle speed. Their embedded system controls the sequence of lights."},{"text":"It provides power to street lights.","correct":false,"explanation":"Supplying electricity to street lighting is not the traffic-light controller’s job. Its embedded system times and controls the sequence of traffic signals."},{"text":"It calculates drivers’ journey routes.","correct":false,"explanation":"Route calculation is performed by navigation systems, not the embedded controller in traffic lights. The controller’s specific task is sequencing the lights."}]},{"id":"d3ada8cd-76f4-4667-9484-24165f19f2c6","cardType":"basic","points":1,"front":"What specific job does an embedded system in a digital camera perform?","back":"It controls image capture and storage.","mcqOptions":[{"text":"It controls image capture and storage.","correct":true,"explanation":"The camera’s embedded system coordinates the image sensor, processor and storage so that photographs can be captured, processed and saved correctly."},{"text":"It stores images on photographic film.","correct":false,"explanation":"Photographic film is used by analogue cameras, not digital embedded systems. A digital camera’s embedded system controls image capture and electronic storage."},{"text":"It converts printed photographs into scans.","correct":false,"explanation":"Converting printed photographs into digital files is the function of a scanner. A digital camera’s embedded system controls image capture and storage."},{"text":"It routes internet traffic between computers.","correct":false,"explanation":"Routing network traffic is the specialised job of a router’s embedded system. In a digital camera, the system controls image capture and storage."}]},{"id":"c34b5c53-7cc8-4351-a55d-516ee5a80723","cardType":"cloze","points":null,"front":"In small embedded systems, the processor is often part of a [ ].","back":"In small embedded systems, the processor is often part of a microcontroller.","mcqOptions":[{"text":"microcontroller","correct":true,"explanation":"A microcontroller combines a processor, memory and input/output interfaces on one integrated circuit, making it suitable for small embedded systems."},{"text":"microprocessor","correct":false,"explanation":"A microprocessor is principally the processing unit and usually needs separate memory and interfaces. The combined component commonly used in small embedded systems is a microcontroller."},{"text":"graphics card","correct":false,"explanation":"A graphics card processes and displays visual data in a computer; it does not normally contain the main processor of a small embedded system. The correct term is microcontroller."},{"text":"hard disk","correct":false,"explanation":"A hard disk provides secondary storage rather than combining processing, memory and I/O. Small embedded systems commonly place the processor within a microcontroller."}]},{"id":"226c45d4-8d78-4b2f-a333-cce8aa3392d6","cardType":"basic","points":2,"front":"Why can a microcontroller control a small device without a desktop-style computer?","back":"It is a small computer on one chip with I/O.","mcqOptions":[{"text":"It is a small computer on one chip with I/O.","correct":true,"explanation":"A microcontroller integrates a processor, memory and input/output connections on one chip, allowing it to operate and control a small device independently."},{"text":"It is a storage device on one chip with I/O.","correct":false,"explanation":"Treating a microcontroller as storage overlooks its processor and control functions. It is a small computer on one chip, containing processing, memory and I/O."},{"text":"It is a desktop computer on one chip with I/O.","correct":false,"explanation":"A microcontroller does not provide the general-purpose features of a desktop computer. It is a small computer on one chip designed for dedicated control tasks."},{"text":"It is a network adapter on one chip with I/O.","correct":false,"explanation":"A network adapter provides communication rather than complete device control. A microcontroller is a small computer on one chip with processing, memory and I/O."}]},{"id":"20f2e42a-c8ce-4be2-83b4-6fb3df13a2fd","cardType":"cloze","points":null,"front":"[ ] is software stored permanently or semi-permanently in a device’s memory.","back":"Firmware is software stored permanently or semi-permanently in a device’s memory.","mcqOptions":[{"text":"Firmware","correct":true,"explanation":"Firmware is software kept permanently or semi-permanently in non-volatile device memory, where it provides the low-level instructions needed to operate the hardware."},{"text":"Middleware","correct":false,"explanation":"Middleware connects applications or software components rather than being defined by permanent device storage. Software stored to control a device at a low level is firmware."},{"text":"Shareware","correct":false,"explanation":"Shareware describes software distributed for trial or limited use, not software stored permanently in a device. The storage-based term required here is firmware."},{"text":"Utility software","correct":false,"explanation":"Utility software performs maintenance tasks such as backups or antivirus scanning. Software stored permanently or semi-permanently within a device’s memory is called firmware."}]},{"id":"a8c2147d-5699-4ab4-ad6f-aa6d99254e82","cardType":"basic","points":1,"front":"What type of component detects physical changes such as temperature or movement?","back":"A sensor.","mcqOptions":[{"text":"A sensor.","correct":true,"explanation":"A sensor detects a physical property or change, such as temperature, light, pressure or movement, and converts it into data for a system."},{"text":"An actuator.","correct":false,"explanation":"An actuator produces a physical change, such as moving a motor or opening a valve, rather than detecting one. Detection is performed by a sensor."},{"text":"A processor.","correct":false,"explanation":"A processor handles instructions and data but does not itself detect environmental changes. A sensor detects physical properties such as temperature or movement."},{"text":"A controller.","correct":false,"explanation":"A controller processes inputs and decides what outputs to produce; the component that detects the physical change and supplies the input is a sensor."}]},{"id":"e3ffbd05-938b-48ee-8c6f-5cabc0c5d1d9","cardType":"basic","points":1,"front":"In a thermostat, the signal that turns heating on or off is what part of input-process-output?","back":"An output.","mcqOptions":[{"text":"An output.","correct":true,"explanation":"The on or off signal is sent from the thermostat to control the heating, so it is an output produced after processing the temperature input."},{"text":"An input.","correct":false,"explanation":"The temperature reading from the thermostat’s sensor is the input. The signal sent to turn the heating on or off is the output."},{"text":"A process.","correct":false,"explanation":"Processing involves comparing the measured temperature with the set temperature. The resulting signal that switches the heating on or off is an output."},{"text":"A storage.","correct":false,"explanation":"Storage retains data or instructions and is not the control signal sent to the heating. That on or off signal is an output."}]},{"id":"0813c2e1-659d-4a3d-bc59-392088c5952f","cardType":"cloze","points":null,"front":"Most embedded systems receive [ ], process it, then produce [ ].","back":"Most embedded systems receive input, process it, then produce output.","mcqOptions":[{"text":"Most embedded systems receive input, process it, then produce output.","correct":true,"explanation":"Embedded systems follow the input-process-output model: they receive data from inputs, process it according to their instructions, and produce an output."},{"text":"Most embedded systems receive output, process it, then produce input.","correct":false,"explanation":"This reverses the input-process-output sequence. An embedded system receives input from sensors or controls, processes that data, and then produces output."},{"text":"Most embedded systems receive input, process it, then produce input.","correct":false,"explanation":"The first stage is correctly identified, but the result of processing is an output, not another input. The correct sequence is input, process, output."},{"text":"Most embedded systems receive output, process it, then produce output.","correct":false,"explanation":"The initial data supplied to an embedded system is called input, not output. After processing that input, the system produces an output."}]},{"id":"5aa5736c-b25c-42d1-8307-7a8c9567ce16","cardType":"basic","points":1,"front":"In the washing-machine example, what output happens if the water level is too low?","back":"The controller opens the water valve.","mcqOptions":[{"text":"The controller opens the water valve.","correct":true,"explanation":"When the sensor reports that the water level is too low, the controller opens the inlet valve so more water enters the washing machine."},{"text":"The controller closes the water valve.","correct":false,"explanation":"Closing the inlet valve would prevent the low water level from increasing. The controller must open the water valve to allow more water in."},{"text":"The controller starts the drum spinning.","correct":false,"explanation":"Starting the drum does not correct an insufficient water level. The controller first opens the water valve so the machine can fill appropriately."},{"text":"The controller activates the drainage pump.","correct":false,"explanation":"The drainage pump removes water and would make the low-level condition worse. The controller instead opens the water valve to add water."}]},{"id":"6c615ea9-1d3b-466c-87e8-ede5781fd239","cardType":"basic","points":1,"front":"A burglar alarm detects movement. Which embedded-system use is this?","back":"Monitoring.","mcqOptions":[{"text":"Monitoring.","correct":true,"explanation":"Movement sensors observe the environment and detect a change, so this is monitoring. The system checks for movement before the alarm responds."},{"text":"Controlling.","correct":false,"explanation":"Controlling means changing or regulating another device’s behaviour. Detecting movement is monitoring because the burglar alarm is sensing changes in its surroundings."},{"text":"Automation.","correct":false,"explanation":"Automation means completing a process with little or no human involvement. The specific use described is monitoring because the alarm is detecting movement."},{"text":"Data logging.","correct":false,"explanation":"Data logging involves recording readings for later use. Merely detecting movement is monitoring, even if the alarm may also store details of an incident."}]},{"id":"a606787c-0fd0-44ba-ad25-05fce9fa303a","cardType":"basic","points":1,"front":"A microwave makes its heating element behave as required. Which embedded-system use is this?","back":"Controlling.","mcqOptions":[{"text":"Controlling.","correct":true,"explanation":"The embedded system regulates the heating element so that it operates as required. Making another component behave in a specified way is controlling."},{"text":"Monitoring.","correct":false,"explanation":"Monitoring means observing conditions using sensors. Making the heating element operate as required is controlling because the system changes another component’s behaviour."},{"text":"Automation.","correct":false,"explanation":"The microwave may automate the overall cooking process, but regulating the heating element itself is controlling because the embedded system directs its operation."},{"text":"Data logging.","correct":false,"explanation":"Data logging means storing readings for later analysis. The microwave is controlling because it makes the heating element operate in the required way."}]},{"id":"6c0512c9-bdd3-4629-ae40-c98464c5b84f","cardType":"basic","points":1,"front":"A dishwasher runs a cleaning cycle with little or no human involvement. Which use is this?","back":"Automation.","mcqOptions":[{"text":"Automation.","correct":true,"explanation":"Running an entire cleaning cycle with little or no human involvement is automation. The embedded system carries out the sequence of washing tasks automatically."},{"text":"Monitoring.","correct":false,"explanation":"Monitoring involves detecting or measuring conditions. The key feature here is completing the cleaning cycle with little human involvement, which makes it automation."},{"text":"Controlling.","correct":false,"explanation":"A dishwasher controls individual components, but the description focuses on running a whole cycle without human involvement. That specific use is automation."},{"text":"Communication.","correct":false,"explanation":"Communication involves transferring data between devices or people. Independently carrying out a cleaning cycle is automation because the process needs little human involvement."}]},{"id":"6c3949ae-1bbf-4bd6-b287-dbe727015cba","cardType":"basic","points":2,"front":"Why can an embedded system make a microwave cheaper than using a laptop-style computer?","back":"It can use a small microcontroller instead of full computer components.","mcqOptions":[{"text":"It can use a small microcontroller instead of full computer components.","correct":true,"explanation":"A microcontroller combines the processing and control needed for one dedicated task in a small, inexpensive package, avoiding unnecessary laptop-style components."},{"text":"It can use a high-powered processor instead of full computer components.","correct":false,"explanation":"A high-powered processor would usually increase cost, power use and cooling requirements. A microwave can be cheaper because a small microcontroller provides sufficient processing."},{"text":"It can use a separate graphics card instead of full computer components.","correct":false,"explanation":"A graphics card is unnecessary for controlling a microwave and would add cost. A small microcontroller cheaply provides the limited processing the appliance requires."},{"text":"It can use a general-purpose motherboard instead of full computer components.","correct":false,"explanation":"A general-purpose motherboard includes unnecessary features and would make the system more expensive. A small microcontroller is cheaper because it supports the microwave’s specific task."}]},{"id":"93b272ad-4ded-4c2c-b73e-8ec68f7b4aa7","cardType":"basic","points":1,"front":"Why are embedded systems suitable for small devices like car key fobs?","back":"They can be small enough to fit inside the device.","mcqOptions":[{"text":"They can be small enough to fit inside the device.","correct":true,"explanation":"Embedded systems use compact components designed for a specific task, allowing the complete control system to fit inside a small device such as a key fob."},{"text":"They can be kept outside and wired to the device.","correct":false,"explanation":"An external wired computer would make a key fob impractical and no longer self-contained. Embedded systems are suitable because they can fit inside the device."},{"text":"They can be built from full-sized computer parts inside the device.","correct":false,"explanation":"Full-sized computer parts would not fit inside a key fob. Embedded systems use compact, dedicated components, making them small enough to fit within the device."},{"text":"They can be larger than the casing around the device.","correct":false,"explanation":"Components larger than the casing could not form a practical key fob. Embedded systems are suitable because their compact hardware can fit inside the device."}]},{"id":"73523a08-c66e-4800-ab92-5fc3b8d04e01","cardType":"basic","points":1,"front":"Why is low power use important in fitness trackers, wireless sensors or remote controls?","back":"They are usually battery-powered.","mcqOptions":[{"text":"They are usually battery-powered.","correct":true,"explanation":"These portable or remote devices rely on batteries with limited stored energy. Low power consumption extends the time between recharging or replacing those batteries."},{"text":"They are usually mains-powered.","correct":false,"explanation":"Mains-powered equipment has a continuous external electricity supply, unlike these portable devices. Low power is especially important because they are usually battery-powered."},{"text":"They are usually mechanically powered.","correct":false,"explanation":"Fitness trackers, wireless sensors and remote controls normally use electrical batteries rather than mechanical power. Efficient operation preserves their limited battery energy."},{"text":"They are usually permanently plugged in.","correct":false,"explanation":"Being permanently plugged in would remove the portability these devices require. They are usually battery-powered, so low consumption increases their operating time."}]},{"id":"1b8e0e9d-46ce-46eb-acc0-63fea6b8f8ee","cardType":"basic","points":2,"front":"Why can an embedded system be more reliable in a washing machine?","back":"It has a specific purpose, so users have fewer ways to interfere.","mcqOptions":[{"text":"It has a specific purpose, so users have fewer ways to interfere.","correct":true,"explanation":"A dedicated washing-machine controller runs a limited set of intended functions. Fewer programs and user-controlled settings reduce opportunities for errors or unwanted changes."},{"text":"It has a general-purpose design, so users have fewer ways to interfere.","correct":false,"explanation":"General-purpose systems allow many programs and configurations, creating more opportunities for interference. Reliability comes from having a specific purpose and limited user control."},{"text":"It has a complex operating system, so users have fewer ways to interfere.","correct":false,"explanation":"A complex operating system introduces extra software and possible failure points. A dedicated embedded system is reliable because its specific purpose limits unnecessary features and interference."},{"text":"It has a wide range of applications, so users have fewer ways to interfere.","correct":false,"explanation":"Supporting many applications would create more settings and possible conflicts. A washing-machine embedded system is more reliable because it performs a specific, restricted purpose."}]},{"id":"4f9c96df-d6cf-4984-8cab-9dbb242447be","cardType":"basic","points":2,"front":"Why do anti-lock braking systems need fast embedded systems?","back":"They must react quickly to braking changes for safety.","mcqOptions":[{"text":"They must react quickly to braking changes for safety.","correct":true,"explanation":"An anti-lock braking system must rapidly detect wheel locking and adjust braking pressure. A delayed response could reduce steering control and increase accident risk."},{"text":"They must save braking data for drivers to review later.","correct":false,"explanation":"Reviewing saved data later cannot prevent a wheel from locking during braking. The system needs speed so it can react immediately to braking changes."},{"text":"They must connect to the internet before changing the brakes.","correct":false,"explanation":"An internet connection would introduce dangerous delays and is unnecessary for braking control. The embedded system must react quickly using local sensor data."},{"text":"They must wait for user input before adjusting braking pressure.","correct":false,"explanation":"Waiting for the driver to respond would be too slow when wheels begin to lock. The system must react quickly and adjust braking pressure automatically."}]}]}],"examCountdown":{"examDate":"2027-05-10","paperLabel":"Paper 1"},"heading":"Embedded systems","title":"Embedded systems Flashcards","topbar":{"backHref":"/gcse/computer-science/edexcel/flashcards"},"topicSidebar":"$L38"}]}],"topicId":"b74ceef8-3747-5342-9df4-c30ba9da7a78","walled":"$L39"}],"$L3a","$L3b"]