IGCSE Computer Science (ALL) test exam
331questions and asnwers 100% correctly
verified answers 2025 RATED A+
What is the definition of an Input Device? - CORRECT ANSWERS Any device that allows a computer
to receive data from the outside world
How many types of scanners are there? - CORRECT ANSWERS 5
What type of scanner is used at airports to read passport pages? - CORRECT ANSWERS 2D Scanners
What type of scanner uses gamma rays? - CORRECT ANSWERS SPCET Scanners
What is the name of the input device that reads a series of dark and light lines of varying thickness? -
CORRECT ANSWERS Barcode Reader
What does the light line represent in a barcode? - CORRECT ANSWERS 0
Where is the most common place that Barcode Readers are used? - CORRECT ANSWERS
Supermarkets
What does QR stand for in QR Code? - CORRECT ANSWERS Quick Response
How many times more data (approximately) can a QR code hold compared to a barcode? - CORRECT
ANSWERS 200
What are 3 automatic adjustments that a microprocessor in a digital camera make? - CORRECT
ANSWERS Shutter speed, aperture size, size of image
,IGCSE Computer Science (ALL) test exam
331questions and asnwers 100% correctly
verified answers 2025 RATED A+
What is the name of the cell that light passes through the lens onto in a digital camera? - CORRECT
ANSWERS Light-sensitive cell
What determines the file size of a photograph? - CORRECT ANSWERS Number of pixels
What are two external factors that affect the quality of the photograph? - CORRECT ANSWERS
Type of lens and lighting
What is the name for the most common input device? - CORRECT ANSWERS Keyboard
What do most computer systems use to prevent the microprocessor waiting for keys to be pressed? -
CORRECT ANSWERS Keyboard buffer
What injury are users prone to who do a lot of typing? - CORRECT ANSWERS Repetitive Strain
Injury (RSI)
What are the two most common pointing devices? - CORRECT ANSWERS Mouse and trackerball
Which port connects the mouse to the computer? - CORRECT ANSWERS USB
What 3 common features do all mouses have? - CORRECT ANSWERS 2 buttons and a scroll wheel
What is the most common environment for where trackerballs are used? - CORRECT ANSWERS
Control rooms
,IGCSE Computer Science (ALL) test exam
331questions and asnwers 100% correctly
verified answers 2025 RATED A+
What is the name of the device that is used to input sound into a computer? - CORRECT ANSWERS
Microphone
What is the name of the device that converts analogue data to digital data? - CORRECT ANSWERS
Analogue to Digital Converter (ADC)
What are the 3 types of touchscreen? - CORRECT ANSWERS Capacitive, Infra-red, Resistive
What general type of touchscreen allows users to utilise whilst wearing gloves or using a stylus? -
CORRECT ANSWERS Resistive
What are the most common types of sensors? - CORRECT ANSWERS Monitoring and Control
What is the name of the device that converts digital data to analogue data? - CORRECT ANSWERS
Digital to Analogue Converter (DAC)
What component of a machine is responsible for controlling systems in control applications? - CORRECT
ANSWERS Actuators
How would monitoring sensors be used in a hospital? - CORRECT ANSWERS To monitor a patient's
vital signs
What are two ways that control sensors are used on the street? - CORRECT ANSWERS Street
lighting and traffic light control
, IGCSE Computer Science (ALL) test exam
331questions and asnwers 100% correctly
verified answers 2025 RATED A+
In street lighting, how long is a lamp left on or off for before readings are sampled again? - CORRECT
ANSWERS 30 minutes
Benefits of high level languages? - CORRECT ANSWERS Easier to read and understand as the
language is closer to human language, easier to write in a shorter time, easier to debug at the
development stage, easier to maintain once in use
Examples of high level languages? - CORRECT ANSWERS C++, Delphi, Java, Pascal, Python, Visual
basic.
Why do people use low level languages - CORRECT ANSWERS To make use of special hardware, to
make use of special machine-dependant instructions, to write code that doesn't take up a lot of space in
primary memory, to write code that performs tasks quickly
Advantages and disadvantages of machine code - CORRECT ANSWERS difficult to understand,
programmers don't usually write in it, in binary (instructions that a computer understands)
Define a compiler - CORRECT ANSWERS A program that translates a program written in high level
language into machine code, translates one line at a time, distributed for general use, compiled
programs are used without the compiler.
Define an interpreter - CORRECT ANSWERS A program that reads a statement from a program in a
high-level language, performs the action specified and then does the same with the next statement over
and over, doesn't produce a translated program, used when a program is being developed, interpreted
programs cant be used without the interpreter
What does an assembler do? - CORRECT ANSWERS Translates a program in assembly language or
machine code so that it can be used by a computer to perform a required task, distributed for general
use, assembled program can be used without the assembler
331questions and asnwers 100% correctly
verified answers 2025 RATED A+
What is the definition of an Input Device? - CORRECT ANSWERS Any device that allows a computer
to receive data from the outside world
How many types of scanners are there? - CORRECT ANSWERS 5
What type of scanner is used at airports to read passport pages? - CORRECT ANSWERS 2D Scanners
What type of scanner uses gamma rays? - CORRECT ANSWERS SPCET Scanners
What is the name of the input device that reads a series of dark and light lines of varying thickness? -
CORRECT ANSWERS Barcode Reader
What does the light line represent in a barcode? - CORRECT ANSWERS 0
Where is the most common place that Barcode Readers are used? - CORRECT ANSWERS
Supermarkets
What does QR stand for in QR Code? - CORRECT ANSWERS Quick Response
How many times more data (approximately) can a QR code hold compared to a barcode? - CORRECT
ANSWERS 200
What are 3 automatic adjustments that a microprocessor in a digital camera make? - CORRECT
ANSWERS Shutter speed, aperture size, size of image
,IGCSE Computer Science (ALL) test exam
331questions and asnwers 100% correctly
verified answers 2025 RATED A+
What is the name of the cell that light passes through the lens onto in a digital camera? - CORRECT
ANSWERS Light-sensitive cell
What determines the file size of a photograph? - CORRECT ANSWERS Number of pixels
What are two external factors that affect the quality of the photograph? - CORRECT ANSWERS
Type of lens and lighting
What is the name for the most common input device? - CORRECT ANSWERS Keyboard
What do most computer systems use to prevent the microprocessor waiting for keys to be pressed? -
CORRECT ANSWERS Keyboard buffer
What injury are users prone to who do a lot of typing? - CORRECT ANSWERS Repetitive Strain
Injury (RSI)
What are the two most common pointing devices? - CORRECT ANSWERS Mouse and trackerball
Which port connects the mouse to the computer? - CORRECT ANSWERS USB
What 3 common features do all mouses have? - CORRECT ANSWERS 2 buttons and a scroll wheel
What is the most common environment for where trackerballs are used? - CORRECT ANSWERS
Control rooms
,IGCSE Computer Science (ALL) test exam
331questions and asnwers 100% correctly
verified answers 2025 RATED A+
What is the name of the device that is used to input sound into a computer? - CORRECT ANSWERS
Microphone
What is the name of the device that converts analogue data to digital data? - CORRECT ANSWERS
Analogue to Digital Converter (ADC)
What are the 3 types of touchscreen? - CORRECT ANSWERS Capacitive, Infra-red, Resistive
What general type of touchscreen allows users to utilise whilst wearing gloves or using a stylus? -
CORRECT ANSWERS Resistive
What are the most common types of sensors? - CORRECT ANSWERS Monitoring and Control
What is the name of the device that converts digital data to analogue data? - CORRECT ANSWERS
Digital to Analogue Converter (DAC)
What component of a machine is responsible for controlling systems in control applications? - CORRECT
ANSWERS Actuators
How would monitoring sensors be used in a hospital? - CORRECT ANSWERS To monitor a patient's
vital signs
What are two ways that control sensors are used on the street? - CORRECT ANSWERS Street
lighting and traffic light control
, IGCSE Computer Science (ALL) test exam
331questions and asnwers 100% correctly
verified answers 2025 RATED A+
In street lighting, how long is a lamp left on or off for before readings are sampled again? - CORRECT
ANSWERS 30 minutes
Benefits of high level languages? - CORRECT ANSWERS Easier to read and understand as the
language is closer to human language, easier to write in a shorter time, easier to debug at the
development stage, easier to maintain once in use
Examples of high level languages? - CORRECT ANSWERS C++, Delphi, Java, Pascal, Python, Visual
basic.
Why do people use low level languages - CORRECT ANSWERS To make use of special hardware, to
make use of special machine-dependant instructions, to write code that doesn't take up a lot of space in
primary memory, to write code that performs tasks quickly
Advantages and disadvantages of machine code - CORRECT ANSWERS difficult to understand,
programmers don't usually write in it, in binary (instructions that a computer understands)
Define a compiler - CORRECT ANSWERS A program that translates a program written in high level
language into machine code, translates one line at a time, distributed for general use, compiled
programs are used without the compiler.
Define an interpreter - CORRECT ANSWERS A program that reads a statement from a program in a
high-level language, performs the action specified and then does the same with the next statement over
and over, doesn't produce a translated program, used when a program is being developed, interpreted
programs cant be used without the interpreter
What does an assembler do? - CORRECT ANSWERS Translates a program in assembly language or
machine code so that it can be used by a computer to perform a required task, distributed for general
use, assembled program can be used without the assembler
