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