Computer Science for IGCSE & O level - Hardware (Section 16)
1
Which of the following is NOT a key difference between IPv4 and IPv6?
উত্তর
(D)
The maximum transmission unit (MTU).
2
What technology allows for greater storage capacity on optical discs?
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(D)
All of the above
3
What is one of the advantages of using cache memory?
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(B)
Faster access times than main memory.
4
In 3D printing, which process involves applying material in layers?
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(B)
Additive manufacturing
5
Which of the following are types of touch screen technologies?
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A
B
D
6
What type of signal is used to describe the brightness level?
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(A)
Analog
7
Which items are often used as a backup system? (Select two)
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A
D
8
What is the function of an LED in an optical mouse?
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(B)
To emit light onto the surface.
9
Which of the following is used to convert a 3D model into instructions that a 3D printer can understand?
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(A)
Slicing software
10
When using a QR code, what determines the number of characters that can be encoded?
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(C)
The level of error correction.
11
What is the role of a micro-mirror on a DMD (Digital Micromirror Device) chip in a DLP projector?
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(C)
To reflect light towards or away from the projection lens.
12
What is the role of the fuser unit in laser printing?
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(B)
To fuse the toner to the paper.
13
What is the primary function of a digital-to-analog converter (DAC)?
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(C)
To convert digital data into analog signals.
14
Which component in a computer system is primarily responsible for translating logical memory addresses into physical memory addresses?
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(C)
The Memory Management Unit (MMU).
15
Which memory type is known for its non-volatility, meaning it retains data even when power is removed?
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(D)
Flash memory (in SSDs)
16
In the context of Blu-ray discs, what does a shorter wavelength of the laser light allow for?
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(B)
Increased storage capacity.
17
What is the difference between S-RAM (static random access memory) and D-RAM (dynamic random access memory)?
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(B)
D-RAM has a higher memory capacity.
18
Which of the following is a security concern associated with using cloud storage? (Select two)
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A
B
19
Which of the following is a benefit of using cloud storage?
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(C)
Accessibility from anywhere with Internet
20
Which of the following is a function of an ergonomic keyboard?
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(A)
To prevent repetitive strain injuries.
21
Which of the following is NOT a typical output device?
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(D)
Webcam
22
What kind of images do 3D scanners produce?
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(A)
Three dimensional
23
What is the role of the read/write heads in a hard drive?
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(C)
To read and write data to the disk.
24
What is the function of a Network Interface Card (NIC)?
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(B)
To allow a device to connect to a network.
25
What is the role of a switch in a network?
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(C)
To forward data packets within a network based on MAC addresses.
26
What technology makes SSDs more durable and less susceptible to damage from physical shocks compared to HDDs?
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(C)
Flash memory
27
In the street lighting example, what does the ADC do?
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(C)
Converts analog signals from the sensor to digital signals.
28
In a greenhouse environmental control system, what information does the computer typically receive to control the climate?
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A
B
D
29
What is 'refresh' in the context of DRAM?
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(B)
Recharging the capacitors.
30
What is the primary advantage of increasing the clock speed of a CPU?
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(C)
It allows the CPU to process instructions faster.
31
Which cloud model is the best fit for a company looking to maintain high levels of data security and control while also taking advantage of cloud scalability and cost-effectiveness?
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(C)
Hybrid Cloud
32
Which of the following are advantages of using virtual memory? (Select all that apply)
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A
B
D
33
What component in a digital camera converts light into an electrical signal?
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(B)
The image sensor
34
What is the typical function performed by an embedded system in a microwave?
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(B)
To control the cooking time and power level.
35
What is the primary purpose of the voice coil within a loudspeaker?
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(B)
To vibrate the cone.
36
What is the potential consequence of excessive
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(C)
Slower system performance.
37
What is a key advantage of SSDs over HDDs regarding access time?
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(B)
Faster access times due to no moving parts.
38
Which component is responsible for providing a wireless connection to a computer?
উত্তর
(B)
Wireless router
39
Which of the following describes the process in a laser printer after the laser beam scans the drum?
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(B)
Toner is attracted to the charged areas of the drum.
40
What is the primary function of a dielectric in flash memory?
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(B)
To store the charge.
41
What determines the quality of the final printed image in a laser printer?
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(C)
The resolution (DPI).
42
Which of the following is a primary function of an SSD controller?
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(B)
To manage the flash memory and perform wear leveling.
43
In the context of street lighting control, what is the primary goal of the system?
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(B)
To automatically control the lights based on ambient light.
44
In a digital camera, which component controls the amount of time light falls on the sensor?
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(B)
The shutter.
45
Compared to a standard DVD, what is the primary advantage of a Blu-ray disc?
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(C)
Higher storage capacity.
46
What does the phrase "a number of images occur when scanning a document" means?
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(C)
The scanner creates a single image of the document.
47
What technology does the barcode scanner typically use?
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(B)
Light reflection
48
What does the acronym DMD stand for in the context of projectors?
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(A)
Digital Micro Mirror Device
49
How do 2D scanners create images?
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(B)
By converting a document into an electronic form.
50
In a 3D printer, what process immediately follows creating a CAD model?
