Computer Science for IGCSE & O level - Hardware (Section 16)
1
Which of the following is NOT a key difference between IPv4 and IPv6?
Trả lời
(D)
The maximum transmission unit (MTU).
2
What technology allows for greater storage capacity on optical discs?
Trả lời
(D)
All of the above
3
What is one of the advantages of using cache memory?
Trả lời
(B)
Faster access times than main memory.
4
In 3D printing, which process involves applying material in layers?
Trả lời
(B)
Additive manufacturing
5
Which of the following are types of touch screen technologies?
Trả lời
A
B
D
6
What type of signal is used to describe the brightness level?
Trả lời
(A)
Analog
7
Which items are often used as a backup system? (Select two)
Trả lời
A
D
8
What is the function of an LED in an optical mouse?
Trả lời
(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?
Trả lời
(A)
Slicing software
10
When using a QR code, what determines the number of characters that can be encoded?
Trả lời
(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?
Trả lời
(C)
To reflect light towards or away from the projection lens.
12
What is the role of the fuser unit in laser printing?
Trả lời
(B)
To fuse the toner to the paper.
13
What is the primary function of a digital-to-analog converter (DAC)?
Trả lời
(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?
Trả lời
(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?
Trả lời
(D)
Flash memory (in SSDs)
16
In the context of Blu-ray discs, what does a shorter wavelength of the laser light allow for?
Trả lời
(B)
Increased storage capacity.
17
What is the difference between S-RAM (static random access memory) and D-RAM (dynamic random access memory)?
Trả lời
(B)
D-RAM has a higher memory capacity.
18
Which of the following is a security concern associated with using cloud storage? (Select two)
Trả lời
A
B
19
Which of the following is a benefit of using cloud storage?
Trả lời
(C)
Accessibility from anywhere with Internet
20
Which of the following is a function of an ergonomic keyboard?
Trả lời
(A)
To prevent repetitive strain injuries.
21
Which of the following is NOT a typical output device?
Trả lời
(D)
Webcam
22
What kind of images do 3D scanners produce?
Trả lời
(A)
Three dimensional
23
What is the role of the read/write heads in a hard drive?
Trả lời
(C)
To read and write data to the disk.
24
What is the function of a Network Interface Card (NIC)?
Trả lời
(B)
To allow a device to connect to a network.
25
What is the role of a switch in a network?
Trả lời
(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?
Trả lời
(C)
Flash memory
27
In the street lighting example, what does the ADC do?
Trả lời
(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?
Trả lời
A
B
D
29
What is 'refresh' in the context of DRAM?
Trả lời
(B)
Recharging the capacitors.
30
What is the primary advantage of increasing the clock speed of a CPU?
Trả lời
(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?
Trả lời
(C)
Hybrid Cloud
32
Which of the following are advantages of using virtual memory? (Select all that apply)
Trả lời
A
B
D
33
What component in a digital camera converts light into an electrical signal?
Trả lời
(B)
The image sensor
34
What is the typical function performed by an embedded system in a microwave?
Trả lời
(B)
To control the cooking time and power level.
35
What is the primary purpose of the voice coil within a loudspeaker?
Trả lời
(B)
To vibrate the cone.
36
What is the potential consequence of excessive
Trả lời
(C)
Slower system performance.
37
What is a key advantage of SSDs over HDDs regarding access time?
Trả lời
(B)
Faster access times due to no moving parts.
38
Which component is responsible for providing a wireless connection to a computer?
Trả lời
(B)
Wireless router
39
Which of the following describes the process in a laser printer after the laser beam scans the drum?
Trả lời
(B)
Toner is attracted to the charged areas of the drum.
40
What is the primary function of a dielectric in flash memory?
Trả lời
(B)
To store the charge.
41
What determines the quality of the final printed image in a laser printer?
Trả lời
(C)
The resolution (DPI).
42
Which of the following is a primary function of an SSD controller?
Trả lời
(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?
Trả lời
(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?
Trả lời
(B)
The shutter.
45
Compared to a standard DVD, what is the primary advantage of a Blu-ray disc?
Trả lời
(C)
Higher storage capacity.
46
What does the phrase "a number of images occur when scanning a document" means?
Trả lời
(C)
The scanner creates a single image of the document.
47
What technology does the barcode scanner typically use?
Trả lời
(B)
Light reflection
48
What does the acronym DMD stand for in the context of projectors?
Trả lời
(A)
Digital Micro Mirror Device
49
How do 2D scanners create images?
Trả lời
(B)
By converting a document into an electronic form.
50
In a 3D printer, what process immediately follows creating a CAD model?
