Cambridge IGCSE ICT: Input and Output Devices (0417)

This guide covers Topic 2 Input and Output Devices, the second of 21 named topics in Cambridge IGCSE Information and Communication Technology (0417), 2026-2028 series. Where Topic 1 introduced the components of a computer system in general terms, Topic 2 looks in detail at the hardware that gets data into a system and results out of it – a set of devices candidates are expected to recognise, name and compare rather than just list.

This topic is dense with named devices but light on abstract theory, which means the fastest revision route is repetition against real scenarios rather than rote memorisation of a device list in the order the syllabus presents it.

Where this fits in 0417

Topic 2 is examined mainly through Paper 1 (Theory), which regularly asks candidates to select or justify an appropriate device for a given scenario – a supermarket checkout, a hospital ward, a school register – rather than simply define what a device does. It builds directly on Topic 1’s overview of computer systems and feeds into later topics on ICT applications (Topic 6), where these same devices reappear in specific real-world contexts such as banking and manufacturing.

Syllabus coverage

CAMBRIDGE IGCSE ICT (0417) — TOPIC 2 INPUT AND OUTPUT DEVICES

2.1 Input devices and their uses

• The characteristics, uses, advantages and disadvantages of: keyboard, numeric keypad, pointing devices, remote control, joystick/driving wheel, touch screen (as an input device), scanners, camera, microphone, sensors, and light pen

2.2 Direct data entry and associated devices

• The characteristics, uses, advantages and disadvantages of direct data entry devices, which read data automatically rather than relying on a person typing or clicking: magnetic stripe reader, chip and PIN reader, Radio Frequency Identification (RFID) reader, Optical Mark Recognition/Reader (OMR), Optical Character Recognition/Reader (OCR), bar code reader, and QR scanner

2.3 Output devices and their uses

• The characteristics, uses, advantages and disadvantages of: monitors, touch screen (as an output device), multimedia projector, laser printer, inkjet printer, dot matrix printer, plotter, 3D printers, speaker, and actuator

The three sub-topics fall naturally into a data journey: 2.1 covers the general-purpose devices a person actively uses to put data in (typing on a keyboard, clicking with a mouse, speaking into a microphone); 2.2 covers devices that capture data automatically from a card, tag, mark or code without a person re-typing it; and 2.3 covers the devices that turn processed data back into something a person can see, hear or physically use. Keeping this journey – input, direct entry, output – in mind makes it easier to place an unfamiliar device correctly under exam pressure, since Cambridge sometimes introduces devices candidates have not seen named before and expects them to reason about the category from the description given.

A worked comparison illustrates how the topic is actually examined. A library issuing books could use a keyboard to type each book’s ID number, but a barcode reader is faster and less error-prone because it removes manual transcription; a hospital tagging patient wristbands might prefer an RFID reader over a barcode reader because RFID does not require a direct line of sight and can be read at a short distance, which matters when a patient is moving or the tag is concealed. On the output side, a graphic designer proofing a poster at full size needs a plotter rather than an inkjet printer, because plotters are built for large-format, high-precision line work, while a school library printing everyday worksheets is better served by a cheaper inkjet or laser printer. These trade-offs – speed, accuracy, cost, size, line of sight, durability – are exactly what “advantages and disadvantages” questions in Paper 1 are testing.

How to approach it

The recurring exam pattern for this topic is “identify the most suitable device and justify your choice”, so the most efficient way to revise it is device-by-scenario rather than device-by-definition. Build a simple table with three columns – device, one key advantage, one key disadvantage – for every device in 2.1 to 2.3, then practise applying it: a supermarket needs a bar code reader for speed and accuracy at the till but a chip and PIN reader for secure payment; a school taking attendance is better served by an RFID reader than a keyboard because it removes manual entry; a delivery company scanning parcels needs a bar code or QR scanner rather than OCR, because OCR is suited to reading printed or handwritten text, not printed codes. Note that some devices genuinely belong in more than one category – a touch screen is both an input and an output device, and this distinction (input when used to make a selection, output when displaying an image) is a common point tested directly. Direct data entry devices (2.2) are also worth learning as a group distinct from 2.1, since exam questions sometimes ask candidates to explain why a direct data entry method is preferred over manual input for a given task – typically speed, reduced error rate, and no need for a person to read or interpret the data before it is entered.

Actuators are worth a specific mention, since they are the output device candidates most often forget: an actuator converts an electrical signal into physical movement (opening a valve, moving a robot arm, triggering a motor), which makes it the correct answer whenever a scenario describes a computer system causing something to move or operate physically rather than displaying, printing or sounding an output.

Official syllabus

Cambridge IGCSE Information and Communication Technology (0417) syllabus for exams in 2026, 2027 and 2028 — cambridgeinternational.org.