Computer Science for IGCSE & O level - Hardware (Section 27)
1
In the context of embedded systems in a car, which of the following functions is NOT typically handled by an embedded system?
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(D)
Providing weather updates via satellite communication
2
What does the MAC address uniquely identify?
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(D)
A network interface.
3
What is a common use of coaxial cable?
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(B)
Connecting to the internet via cable modem
4
Which of the following is NOT a key component of a typical laser printer?
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(B)
Ink cartridge
5
Which steps are involved when producing sound from digital data through a loudspeaker?
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A
B
D
6
What is the function of the red light-emitting diode (LED) in an optical mouse?
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(B)
To illuminate the surface.
7
What is the main advantage of using flash memory in SSDs compared to traditional HDDs?
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(A)
Lower power consumption and faster access times.
8
Which of the following describes a characteristic of a static IP address?
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(C)
Does not change unless manually changed.
9
What is the function of the actuator arm in an HDD?
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(B)
To position the read/write heads.
10
Which component is responsible for converting the signal from the cable (e.g. coaxial or fiber optic) to a signal that computers can understand?
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(C)
Modem
11
In the greenhouse control example, the computer receives a signal if the humidity falls below a pre-set value. What is the computer likely to do in response?
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(C)
Spray water to increase humidity.
12
After light passes through the lens of a digital camera, what is the next step in image creation?
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(B)
The light hits the image sensor.
13
Which of these are applications for sensors?
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A
B
C
14
In the Von Neumann architecture, what is the primary function of the Control Unit?
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(C)
To fetch instructions from memory and direct operations.
15
Which part of the keyboard helps to identify a character and send it to the CPU?
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(A)
The membrane or circuit board.
16
What type of device is used to record and output data for the vending machine?
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(B)
An LED display
17
When referring to a network interface, what is a MAC address primarily used for?
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(B)
Uniquely identifying a device on a local network.
18
In an embedded system, which of the following is NOT a typical component?
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(D)
A graphical user interface (GUI).
19
What is a key difference between IPv4 and IPv6 in terms of address length?
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(C)
IPv6 uses longer addresses.
20
What do the 3D coordinates from a 3D scanner represent?
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(D)
The location of a series of points.
21
Which component is primarily responsible for storing the operating system when a computer is turned off?
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(D)
Hard Drive
22
What does SSD stand for?
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(A)
Solid State Drive
23
In face recognition software, how is each face often analyzed?
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(B)
By comparing two digital images using face recognition software.
24
What is the primary function of a microphone diaphragm?
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(C)
To vibrate in response to sound waves.
25
Which component in an HDD is responsible for reading and writing data?
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(C)
Read/write head
26
Which of the following statements best describes the function of a router?
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(C)
Connects different networks and forwards data packets.
27
What is the function of a switch in a local area network (LAN)?
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(C)
To connect devices and forward data packets based on MAC addresses.
28
Which step in laser printing prepares the drum to receive the toner?
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(C)
Applying a uniform charge to the drum
29
What is a key function of a computer within a greenhouse environment control system?
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(C)
To monitor and adjust the greenhouse environment.
30
What is the primary advantage of solid-state drives (SSDs) over Hard Disk Drives (HDDs) in terms of performance?
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(C)
SSDs have significantly faster access times.
31
What are some examples of storage devices used to provide virtual memory?
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(B)
SSD/HDD
32
Which of the following protocols is used by DHCP to automatically assign IP addresses?
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(C)
DHCP
33
In the context of computer memory, what does the acronym 'MAR' stand for?
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(B)
Memory Address Register
34
What is meant by rotational latency in an HDD?
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(C)
The time it takes for the desired sector to rotate under the read/write head.
35
What kind of signals does the amplifier use to drive the loudspeaker?
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(B)
Analog signals
36
Which of the following storage media uses a shorter wavelength light to achieve higher storage density?
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(C)
Blu-ray
37
What component in a loudspeaker vibrates in response to electrical signals, creating sound waves?
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(C)
The cone
38
What are the key differences between SRAM and DRAM?
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(C)
SRAM is faster and more expensive than DRAM.
39
What is a key characteristic that distinguishes DVD-Rs from DVD+Rs?
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(B)
The way the data is written.
40
What happens after a sound goes to a microphone?
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(B)
The sound is converted to an electrical current.
41
What is the function of the print head in an inkjet printer?
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(B)
To spray the ink droplets onto the paper.
42
What is an advantage of embedded systems being dedicated to a specific task?
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(B)
They can be more energy-efficient and optimized for that task.
43
What type of memory is commonly used to store the operating system and applications when the computer is turned on?
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(C)
RAM
44
What are the inputs of the embedded system within the vending machine?
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A
B
D
45
Which device is primarily used to convert a digital signal into an analog signal in an audio system?
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(C)
DAC
46
Which of the following is an advantage of using an SSD over a traditional HDD?
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(C)
Faster data access times.
47
Which type of memory is used for the temporary storage of data and instructions that the CPU needs to access quickly?
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(C)
RAM
48
What is the primary difference between a hard disk drive (HDD) and a solid-state drive (SSD) regarding data storage?
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(C)
HDDs use magnetic platters, while SSDs use flash memory.
49
What is a significant advantage of SSDs (Solid State Drives) over HDDs (Hard Disk Drives) in terms of performance?
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(C)
Faster access times.
50
Which of the following best describes a static IP address?
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(C)
An address manually configured and does not change unless updated.
