Computer Science for IGCSE & O level - Hardware (Section 13)
1
Which is an example of a file transfer protocol?
2
Which of the following is an advantage of using a wired mouse over a wireless mouse?
คำตอบ(D)
Avoids the need for batteries.
3
What is the function of the sensor in a central heating system?
คำตอบ(B)
To measure the room's temperature.
4
Which of the following storage types utilize magnetic platters?
5
What is the role of the membrane or circuit board in an ergonomic keyboard?
คำตอบ(B)
Identifies which key has been pressed.
6
What is the main difference between a CD and a DVD?
คำตอบ(B)
DVDs have a larger storage capacity.
7
Which of the following is a characteristic of Blu-ray discs compared to DVDs?
คำตอบ(C)
Blu-ray discs typically use a thinner laser beam, allowing for more data storage.
8
In the context of a microphone, which component converts sound vibrations into electrical signals?
9
What is the benefit of having a dual-layer Blu-ray disc?
10
What is the role of the 'tunnel oxide' layer in flash memory?
คำตอบ(B)
To allow electrons to pass into and out of the floating gate.
11
What is a key advantage of a DLP projector over an LCD projector in terms of image quality?
12
What type of sensor is used to detect the presence of an intruder in a building?
13
What do vending machines use to control many of their functions?
14
In an ink-jet printer, the ink is fed through what component to form letters on the paper?
15
What is the purpose of the laser in a laser printer?
คำตอบ(B)
To create an electrostatic image on the drum.
16
In a central heating system, what action does the microprocessor take if the sensor detects the temperature is below the pre-set value?
17
In a central heating system, what happens when the sensor data indicates the temperature is below the pre-set value?
คำตอบ(B)
The gas valve opens to provide more heat.
18
Which of the following is a significant advantage of using SSDs compared to HDDs in a laptop?
คำตอบ(C)
Increased durability and faster access times
19
In the street lighting system, what component receives the digital signal from the ADC?
20
What is a key advantage of SSDs compared to HDDs regarding data access?
คำตอบ(B)
Faster read/write speeds due to no moving parts
21
In a chemical process control system, what is the signal type the computer sends to the DAC?
22
What type of technology is used by modern SSDs?
23
What type of screen technology uses organic compounds that emit light when electricity is applied?
24
In the context of digital cameras, the text describes how light interacts with a light-sensitive cell. What is the result of this interaction?
คำตอบ(B)
The creation of an electrical charge.
25
What type of input device does a touchscreen represent?
26
In computer architecture, what is the purpose of an operand?
คำตอบ(B)
To provide the data or the address of the data to be used by an instruction.
27
What is used by the embedded system to determine the time of day or day of the week for lighting systems?
28
What is the difference between a CD-R and a CD-RW?
คำตอบ(A)
CD-R is read-only; CD-RW can be re-written.
29
What determines the storage capacity of a hard drive?
คำตอบ(B)
The number of platters and the density of data storage on each platter.
30
What does the 'transferring' stage accomplish in the laser printing process?
คำตอบ(C)
The toner is moved from the drum to the paper.
31
What is the function of a NIC?
คำตอบ(B)
Connect a device to a network
32
What is the main function of an ALU?
คำตอบ(B)
To perform arithmetic and logical operations
33
What is the significance of a shorter wavelength laser in Blu-ray technology compared to DVDs?
คำตอบ(B)
More data can be stored on a disc
34
What is a key feature that distinguishes Blu-ray discs from DVDs?
35
What is the key characteristic of OLED technology that differentiates it from LED and LCD?
คำตอบ(B)
OLEDs produce their own light.
36
Which type of optical disc has the smallest storage capacity?
37
What are some of the potential security risks associated with using cloud storage?
38
Which of the following is a critical step in the process of 3D printing?
คำตอบ(B)
Using CAD software to design the object.
39
In a street lighting system, what does the microprocessor do with the information it receives from the light sensor?
40
Which of the following is a benefit of cloud storage?
41
What is the purpose of a MAC address?
คำตอบ(A)
To identify a device on a local network.
42
What type of scanner is used to convert physical documents to a digital form?
43
What is the main purpose of a switch in a network?
คำตอบ(C)
To connect multiple devices within a local area network.
44
What technology can be used to interface with the home lighting systems?
45
Which is an advantage of a wired mouse?
46
What are the two main parts of an instruction?
47
What device is used to read a barcode?
48
What is the primary function of an anti-lock braking system (ABS)?
คำตอบ(B)
To prevent the wheels from locking up during heavy braking.
49
Which of the following features is most significant in increasing the storage capacity of Blu-ray discs compared to DVDs?
คำตอบ(C)
A shorter wavelength laser.
50
What is the function of the 'charging' step in a laser printer?
คำตอบ(B)
To create a static charge on the drum.
