IGCSE Computer Science Paper 1 Word Scramble: 3.2 Input and Output Devices and 3.3 Data Storage (Modules 293–303)
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Word scramble
Unscramble the letters and write each key term on the line.
1
BCKEAEFD OPLO
A sensor sends readings to a microprocessor, which compares them with a stored value and signals an actuator, such as a heater, to act. This repeats continuously.
2
AATD ITSFR, HTEN ESRONS
Each sensor captures one type of data, so identify the data first (e.g. moisture in soil, humidity in air), then name the sensor that measures it.
3
UIBLSEAT RSSENO
The sensor that measures the physical quantity a system needs, e.g. light for street lamps or pressure for a car park. Justify it with 'because'.
4
SPITNU DNA TOUTUSP
A complete system uses input devices or sensors to capture data and output devices or actuators to deliver results, each chosen to suit the task.
5
AYMPRRI AGEORST
Memory the CPU can access directly, so it is fast. It is made up of RAM (temporary, holds running programs and data) and ROM (permanent, holds start-up instructions).
6
EOLILATV OMEYRM
Memory that loses its contents when the power is off, like RAM. Non-______, like ROM and SSDs, keeps its data without power.
7
MOR
Read only memory: non-volatile primary storage whose contents are fixed. It keeps the start-up (boot) instructions, so data stays when power is off. Also used in embedded devices.
8
MAR SV ORM
RAM is volatile, read/write and holds running programs; ROM is non-volatile, read only and holds start-up instructions. RAM is larger.
9
MAR NDA MOR
ROM holds the start-up instructions that survive power-off. RAM holds the changing operating system, programs and data in use. A computer needs both to start up and to run.
10
OYSCDRNEA EROTAGS
Non-volatile storage the CPU cannot access directly. It keeps data permanently, even when power is off. Data is copied to RAM before use. Types: magnetic, optical, solid-state.
Answer Key
IGCSE Computer Science Paper 1 · Modules 293–303
1BCKEAEFD OPLO → feedback loop — A sensor sends readings to a microprocessor, which compares them with a stored value and signals an actuator, such as a heater, to act. This repeats continuously.
2AATD ITSFR, HTEN ESRONS → data first, then sensor — Each sensor captures one type of data, so identify the data first (e.g. moisture in soil, humidity in air), then name the sensor that measures it.
3UIBLSEAT RSSENO → suitable sensor — The sensor that measures the physical quantity a system needs, e.g. light for street lamps or pressure for a car park. Justify it with 'because'.
4SPITNU DNA TOUTUSP → inputs and outputs — A complete system uses input devices or sensors to capture data and output devices or actuators to deliver results, each chosen to suit the task.
5AYMPRRI AGEORST → primary storage — Memory the CPU can access directly, so it is fast. It is made up of RAM (temporary, holds running programs and data) and ROM (permanent, holds start-up instructions).
6EOLILATV OMEYRM → volatile memory — Memory that loses its contents when the power is off, like RAM. Non-volatile memory, like ROM and SSDs, keeps its data without power.
7MOR → ROM — Read only memory: non-volatile primary storage whose contents are fixed. It keeps the start-up (boot) instructions, so data stays when power is off. Also used in embedded devices.
8MAR SV ORM → RAM vs ROM — RAM is volatile, read/write and holds running programs; ROM is non-volatile, read only and holds start-up instructions. RAM is larger.
9MAR NDA MOR → RAM and ROM — ROM holds the start-up instructions that survive power-off. RAM holds the changing operating system, programs and data in use. A computer needs both to start up and to run.
10OYSCDRNEA EROTAGS → secondary storage — Non-volatile storage the CPU cannot access directly. It keeps data permanently, even when power is off. Data is copied to RAM before use. Types: magnetic, optical, solid-state.