Computer Science for IGCSE & O level - Hardware (Section 12)
1
What does the CPU relate to inside an ergonomic keyboard?
คำตอบ(A)
Identifies the keys pressed
2
What is a key disadvantage of LCD projectors when compared to DLP projectors?
3
What is a potential security risk when using cloud storage?
4
In primary memory, what is the difference between RAM and ROM?
คำตอบ(C)
RAM is volatile, while ROM is non-volatile.
5
Which of the following is true of optical discs?
6
Which of the following is NOT an application of 3D printing mentioned in the text?
คำตอบ(B)
Producing high-volume consumer goods.
7
What does the term 'developing' refer to in the context of laser printing?
คำตอบ(C)
Applying the toner to the drum.
8
Which factor can cause a slowdown when using a virtual memory system?
9
What does the text state happens if the barcode is first read by a red laser or LED?
คำตอบ(B)
The laser reflects off the barcode.
10
What is the role of a lens in an LCD projector?
คำตอบ(C)
To focus the image onto the screen.
11
In an anti-lock braking system (ABS), what is the system designed to prevent?
คำตอบ(B)
The wheels from locking up during braking.
12
What is the function of the Instruction Register (IR)?
คำตอบ(B)
To hold the current instruction being executed.
13
How does the operating system use virtual memory?
คำตอบ(C)
To extend the RAM by using hard drive space.
14
How does a capacitive touchscreen detect touch?
คำตอบ(A)
By sensing the change in electrical capacitance when a finger touches the screen.
15
What is a key benefit that SSDs provide over HDDs?
16
Which type of storage media is most susceptible to physical damage from dropping a laptop?
17
What type of interface does an ergonomic keyboard help minimize the chance of?
คำตอบ(A)
Injuries to the hands and wrists.
18
What does the text mention is a use for the QR code?
คำตอบ(C)
To provide a link to a website.
19
In a Von Neumann architecture, what is the primary characteristic that distinguishes it?
คำตอบ(B)
Shared memory space for both instructions and data.
20
What does the term "word" refer to in computer architecture?
คำตอบ(B)
A group of bits that can be handled as a unit.
21
What type of memory is primarily used as working memory by the CPU?
22
What best describes the role of the print head in an ink-jet printer?
คำตอบ(D)
To spray ink droplets onto the paper.
23
Which of the following is a major application of sensors in automotive systems?
คำตอบ(D)
Controlling anti-lock brakes (ABS).
24
What is the role of a magnetic field sensor in an ABS system?
คำตอบ(A)
To monitor the speed of each wheel.
25
What is the function of 'tracks' and 'sectors' in a hard drive?
คำตอบ(C)
To organize data on the platters.
26
What is the advantage of a wired mouse?
27
What is the function of the ADC in the street lighting system?
คำตอบ(B)
To convert the light level to digital form.
28
How does SRAM store its data?
คำตอบ(B)
By using flip-flops to store each bit of memory.
29
Which of the following is used to help identify someone from a passport scan?
30
What is one of the advantages of a digital camera, as mentioned in the text?
คำตอบ(C)
The image is instantly available.
31
What component in a loudspeaker vibrates to produce sound?
32
What is the primary benefit of using IPv6 over IPv4?
33
In the process of producing sound via a microphone, what causes the copper coil to move?
คำตอบ(B)
The vibration of the diaphragm.
34
Which of the following is *not* a benefit of SSDs?
คำตอบ(C)
Higher storage capacity than HDDs
35
Which device converts the domain name to an IP address?
36
What are some things a greenhouse control system can manage?
37
Which type of storage is generally faster, SSD or HDD?
38
In a DLP projector, what are the primary colors used to create the image?
39
Which protocol is used for assigning dynamic IP addresses?
40
What is a characteristic of a static IP address?
41
What is the function of an actuator?
คำตอบ(A)
To convert an electrical signal into a physical action.
42
What is a major advantage of using an SSD over a traditional HDD for laptop usage?
คำตอบ(C)
Faster access times and lower power consumption.
43
What method is used by a washing machine for the purpose of human intervention?
44
What are the main components of a flash memory cell?
คำตอบ(A)
Transistors, a floating gate, and a control gate.
45
What are key advantages of an Infrared touchscreen?
46
Which type of memory is *non-volatile*?
47
In the context of central heating systems, what is the purpose of the microprocessor?
คำตอบ(C)
To compare the sensor data with a pre-set value and act accordingly.
48
What are some disadvantages of HDDs compared to SSDs?
49
Which characteristic is associated with a dynamic IP address?
50
What type of transistors are used in flash memory?
คำตอบ(C)
Floating gate transistors
