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iGCSE CS Topic 3 Quiz Flashcards | StudBud
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iGCSE CS Topic 3 Quiz
iGCSE CS Topic 3 Quiz
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1
Which of the following is an example of an embedded system in a car?
Cruise control.
The type of fuel it uses.
A paint job.
The car's brand logo.
2
What does storage redundancy in cloud storage imply?
Files are stored without backup.
A single copy of files is stored.
Multiple copies of files are stored in different locations.
Files are temporarily stored.
3
How does a thermal bubble inkjet printer work?
Vibrating to push ink through nozzles.
Applying pressure to the ink cartridge.
By heating ink to create a bubble that propels ink onto the paper.
Using static electricity to draw ink out.
4
Which of the following is an example of an input device?
Keyboard
Monitor
Printer
Speakers
5
How do speakers convert digital data into sound?
Through cloud processing.
Using solid-state drives.
Through a Digital-to-Analog Converter (DAC) and an amplifier.
By directly interpreting binary code.
6
Which of these is an example of an output device?
Keyboard
Mouse
Scanner
Monitor
7
What distinguishes 3D scanners from 2D scanners?
3D scanners are used exclusively for document scanning.
2D scanners can capture depth information.
3D scanners capture object shape & dimensions for digital modeling.
There is no difference; both terms are interchangeable.
8
How do DLP projectors create images?
By burning images onto a screen.
Using micro-mirrors and a light source.
Using liquid crystals.
Through laser etching.
9
How do digital cameras capture images?
By scanning documents.
By converting light into digital signals using a sensor.
Through inkjet printing techniques.
By projecting images onto surfaces.
10
What language do CPUs use to execute instructions?
Python.
Machine code or assembly language.
Java.
High-level programming languages.
11
What type of IP address changes each time a device connects to the internet?
MAC address.
Static IP address.
Dynamic IP address.
Local IP address.
12
What are common types of secondary storage?
CPU and GPU.
RAM and ROM.
HDD, SSD, and Optical Disks.
Cache and Registers.
13
What role does the Control Unit (CU) play in the CPU?
Holds the address of the next instruction.
Performs arithmetic and logic operations.
Coordinates and controls the activities within the CPU.
Stores temporary arithmetic and logic results.
14
How do infrared sensors contribute to home security systems?
By cooling the environment.
By increasing Wi-Fi signals.
By painting walls.
By detecting motion through heat signatures.
15
How does an optical mouse detect movement?
By shining light onto a surface and analyzing the reflected images.
By rolling a ball on a surface.
Using GPS to track its position.
Through sound waves.
16
What are the two major components of the CPU?
Hard Drive and Motherboard.
Control Unit and Arithmetic Logic Unit (ALU).
Cache and Registers.
RAM and ROM.
17
What advantage does piezoelectric crystal technology offer in inkjet printers?
It is cheaper to manufacture.
It uses thermal inkjet technology.
It produces larger ink droplets for faster printing.
It allows very precise control of ink droplet size.
18
How do 3D printers create objects?
Through high-speed impact printing.
By burning images onto surfaces.
Using inkjet technology on paper.
By layering material to build objects from a digital model.
19
What is the function of the address bus in a computer system?
Transfers control signals.
Carries data between the CPU and RAM.
Specifies the memory locations (addresses) for data transfer.
Supplies power to the CPU.
20
What directly impacts a CPU's performance?
Size of the hard drive.
Clock speed, number of cores, cache size.
Sound card quality.
Colour depth of the monitor.
21
What is one function of the modem in a home network?
Connects the local network to the internet
Acts as a firewall.
Provides additional RAM.
Serves as a backup storage.
22
What is secondary storage primarily used for?
To enhance the processing speed of the CPU.
To provide permanent storage of data.
To temporarily store data for processing.
To store data only while the computer is powered on.
23
How does increasing the CPU's clock speed affect its performance?
Decreases power consumption.
Reduces the overall system performance.
Increases the data storage capacity.
Increases the speed at which it processes instructions.
24
What best defines cloud storage?
Remote storage provided by a company and accessed over the Internet.
A method of storing data on local servers only.
A physical storage device located on-premises.
The use of USB drives for data storage.
25
What is the primary purpose of output devices?
To store data for future use.
To input data into a computer.
To enhance the computational speed of a computer.
To convert data into a human-perceptible form.
26
What distinguishes RAM from ROM?
ROM can store more data than RAM.
RAM is volatile; ROM is non-volatile.
RAM is non-volatile; ROM is volatile.
RAM is used for external storage.
27
How do data packets navigate through a network?
Through direct line-of-sight transmission.
They may take different routes through the network
By following a single, predetermined path.
By remaining static in the network.
28
In the Von Neumann architecture, what is stored together in the same memory?
The output data before it is sent to the output devices.
The addresses of the next instructions.
Only the data to be processed.
Program instructions and the data the programs use.
29
What sets laser printers apart from inkjet printers?
They are primarily used for 3D printing.
They print using wet ink.
They utilize screen printing technology.
hey use toner and static electricity to transfer images to paper.
30
Why might cloud storage not be suitable for large files needing quick access?
Due to potential delays in downloading or uploading large files.
Cloud services do not support large files.
Cloud storage offers faster access than local storage.
Large files are automatically compressed.
31
What advantage do SSDs have over HDDs?
Cheaper cost per gigabyte.
Lower storage capacity.
Faster read/write speeds.
More moving parts.
32
What advantage do LED screens have over fluorescent-backlit LCD screens?
They are heavier and larger.
LED screens have a shorter lifespan.
They use more power.
Sharper image and more vivid colours.
33
What is a unique feature of LED screens compared to LCD screens?
LED screens use light-emitting diodes for backlighting.
LED screens can only display black and white images.
LED screens are primarily used for text display.
LED screens do not use electricity.
34
What is the primary function of sensors in technology?
To increase device storage capacity.
To enhance device battery life.
To improve device aesthetics.
To measure physical properties from the environment.
35
How do moisture sensors benefit agriculture?
By changing the soil color.
By detecting pests in the soil.
By playing music to plants.
By monitoring soil dampness to control irrigation.
36
What is a primary concern with cloud storage privacy?
Data is always public.
Control over data security is managed by an external company.
Local storage is inherently less secure.
User encryption is not possible.
37
What does the Memory Data Register (MDR) do?
Holds the result of arithmetic operations.
Contains the address of the next instruction.
Decodes the current instruction.
Holds the actual instruction or the data fetched from memory.
38
What advantage does a 3D scanner offer over traditional imaging devices?
It can print images.
It uses less power.
It is more compact and portable.
It enables the conversion of physical objects into 3D digital models.
39
What role do actuators play in output devices?
They move or control mechanisms or systems.
They store data for output devices.
They process digital data.
They cool down output devices.
40
How do IP addresses function in a network?
Reduce data packet size.
Encrypt data packets.
Identify devices uniquely on a network
Increase data transfer speed.
41
What role do proximity sensors play in automobiles?
They assist in safe parking by detecting nearby objects.
They change the oil.
They control the vehicle's speed.
They play music when objects are near.
42
What is stored in ROM?
Temporary user data and documents.
The operating system and all installed applications.
Virtual memory files.
The bootstrap loader and BIOS.
43
What is a key feature of QR codes scanned by smartphones?
They can only store numeric data.
They are only readable by laser scanners.
They can contain links to websites or information.
They require a physical connection to be read.
44
How is an IPv6 address structured?
As eight groups of four hexadecimal digits.
Using dots to separate each octet.
In binary form.
As a single long number.
45
What technology do LCD screens use to display images?
Ink cartridges.
Plasma cells.
Liquid crystals to manipulate light
Mechanical shutters.
46
What is the primary purpose of an instruction set in a CPU?
To manage the computer's operating system.
To define all possible instructions the CPU can execute.
To enhance the graphical performance of the computer.
To increase the CPU's clock speed.
47
What role does the control bus play in the CPU's operation?
It directs signals between CPU & components for operation coordination.
It increases the CPU's clock speed.
It reduces power consumption by the CPU.
It stores data temporarily.
48
How does DHCP contribute to network management?
Filters harmful data packets.
Assigns IP addresses to devices
Encrypts network traffic.
Manages the storage of files.
49
How does magnetic storage, such as HDDs, store data?
By altering the state of liquid crystals.
Using pits and lands on a disc surface.
By storing data in integrated circuits.
Through magnetic encoding on platters.
50
How do multiple cores within a CPU affect its ability to perform tasks?
Limit the CPU to single-task operations.
Decrease the efficiency of cache memory.
They reduce the overall clock speed.
Allow for parallel processing, increasing efficiency with multiple tasks.
51
What are the advantages of IPv6 over IPv4?
Compatibility with older hardware.
Increased address space and improved security.
Smaller address space.
Easier to remember addresses.
52
What device provides wireless access to a network?
Modem
Switch
Router with a Wireless Access Point
Network Bridge
53
What primary function do scanners serve in digital imaging?
To display images on a screen.
To enhance the resolution of printed images.
To convert physical documents and images into digital format.
To store physical documents.
54
What characterises an embedded system?
A system designed for specific control functions within a larger system.
A system that can be easily modified.
It can run multiple operating systems.
It is primarily used for data analysis.
55
What is the purpose of the Program Counter (PC) in the CPU?
Holds the memory address of data.
Accumulates results of arithmetic operations.
Stores the current instruction being executed.
Holds the address of the next instruction to be executed.
56
How do barcode scanners work?
By capturing and analysing photographs.
Through thermal imaging.
By reading the visual pattern of bars and spaces to decode information.
By emitting a sound wave.
57
What is the role of RAM in a computer?
To act as external storage.
To store programs and data that are currently in use.
To permanently store system firmware.
To store the computer's BIOS settings.
58
What advantage does a multi-core CPU have over a single-core CPU?
Decreases the CPU's clock speed.
Consumes less energy.
Only increases the system's boot time.
Can execute more instructions at the same time.
59
What limitation is associated with IPv4 addresses?
They support too many devices.
They are only used in private networks.
hey are too long to remember.
There aren't enough addresses for all devices.
60
Which register holds the memory address of the current instruction or the data to be used?
Current Instruction Register (CIR).
Memory Address Register (MAR).
Program Counter (PC).
Accumulator (ACC).
61
What does the first half of a MAC address represent?
The network configuration settings.
The device's location code.
The manufacturer's identification number.
The device serial number.
62
In assembly language, what are opcodes and operands used for?
Opcodes signify instructions, operands are the data they work on.
To cool the CPU.
To define the CPU's architecture.
To increase data storage.
63
What are the main types of technologies used in inkjet printers?
Thermal bubble and piezoelectric crystal
Laser and thermal.
3D printing and digital.
Dot matrix and screen printing.
64
In what way do QR codes enhance user experience compared to traditional barcodes?
They can store more data and are easily scanned with mobile devices.
They are less secure.
They can only be printed on paper.
They are more expensive to produce.
65
What advantage do capacitive touchscreens have over resistive touchscreens?
They support multi-touch gestures
They are cheaper to manufacture.
They can detect pressure levels.
They use less power.
66
How does the data bus contribute to system operations?
Carries actual data between the CPU and other components.
Determines the clock speed of the CPU.
Specifies the memory addresses for data storage.
Controls the fan speed inside the CPU.
67
How is virtual memory used in a computer?
As a permanent storage for user data.
As the primary method of data storage.
To increase the processing speed of the CPU.
To extend RAM onto the hard drive when RAM is full.
68
Which of the following is a characteristic of secondary storage?
Direct access by the CPU.
Non-volatility.
Volatility.
Limited storage capacity.
69
What is the primary purpose of a MAC address?
To allocate dynamic IP addresses.
To provide a physical address for the device manufacturer.
To encrypt data transmissions.
To uniquely identify network hardware devices.
70
How does cache size influence CPU performance?
Reduces the number of cores needed.
A larger cache speeds up data access, boosting performance.
Increases the need for external storage.
Larger cache size slows down the CPU.
71
The Arithmetic Logic Unit (ALU) is responsible for which operations?
Storing program instructions.
Holding the address of the next instruction.
Performing arithmetic operations and logical operations.
Coordinating CPU activities.
72
What is the primary function of input devices in a computer system?
To process data within the computer.
To output data from the computer to the user.
To store data for long-term retrieval.
To transfer data from the external world to the computer.
73
How are MAC addresses represented?
As simple numeric sequences.
As binary numbers.
As hexadecimal digits
As decimal numbers.
74
How do embedded systems differ from general-purpose computers?
They have higher CPU speeds.
They allow for extensive software installations.
They are designed for specific tasks and cannot install new software.
They are primarily used for data storage.
75
What is the function of a Network Interface Card (NIC) in a computer?
Stores data for short-term access.
Connects the device to a network
Amplifies the signal strength.
Converts digital signals to analog.
76
Which feature is unique to cloud storage compared to local storage?
Limited access to stored data.
A lack of data redundancy.
Synchronisation of devices with the cloud storage.
Data is stored on internal hard drives.
77
What is the function of the Accumulator (ACC) in the CPU?
Decodes the fetched instruction.
Holds the memory address of the current instruction.
Stores the address of the next instruction.
Holds the result of an instruction before it is transferred to memory.
78
What is essential for a device like a tablet to connect to the Internet?
Ethernet Cable
HDMI Cable
Network Interface Card (NIC)
USB Port
79
How do capacitive touchscreens detect user input?
Using infrared beams.
By measuring temperature changes.
Through changes in the electrical field caused by touch.
By detecting pressure.
80
What technology do resistive touchscreens use to detect touch?
Heat sensitivity.
Sound waves.
Magnetic fields.
Pressure sensitivity between layers to complete a circuit
81
Why is virtual memory considered slower than RAM?
Virtual memory is not slower; it's faster than RAM.
It uses a more complex encryption method.
It has a faster data transfer rate.
It relies on the hard drive, which is slower than RAM.
82
How does optical storage, like CDs and DVDs, read data?
Laser beams interpreting pits and lands.
Electrical impulses.
Magnetic fields.
Physical contact with a read/write head.
83
How does cloud storage offer advantages in terms of management?
Users must manage and maintain the storage hardware.
Requires frequent manual updates by the user.
Decreases storage availability over time.
The cloud storage provider handles storage with redundancy & scalability
