Computer Science for IGCSE & O level - Hardware (Section 23)
1
In cloud computing, what is the main advantage of redundancy?
คำตอบ(C)
Ensuring data availability and fault tolerance.
2
What is the purpose of 'slicing' in 3D printing?
คำตอบ(B)
To convert the 3D model into printable layers.
3
What does a computer use to recognize a scanned face?
คำตอบ(C)
Distance between the eyes
4
Which of the following is a major advantage of SSDs compared to HDDs?
5
What is the advantage of using barcodes?
6
In a laser printer, which step usually comes *after* the toner is transferred to the paper by the transfer roller?
คำตอบ(B)
The paper passes through the fuser.
7
What is an example of an input device that the image highlights?
8
Which of the following is typically used to store the operating system's core files?
คำตอบ(B)
Hard Disk Drive (HDD) or Solid State Drive (SSD)
9
What is the role of the control unit in a computer system?
คำตอบ(B)
To manage the flow of data and instructions within the CPU.
10
What is the final process performed on the electrical current of a microphone to make it ready to be processed by a computer?
คำตอบ(B)
Conversion to a digital format.
11
What is the key to the function of a DLP projector?
12
What is the purpose of the Radio Access Layer (MAC) address in an NIC?
คำตอบ(B)
To uniquely identify the device on a network.
13
In the context of greenhouse control, what action might the system take if the humidity is below a certain level?
14
In the context of 3D printing, what does FDM stand for?
คำตอบ(A)
Fused Deposition Modeling
15
What does the 3D printing process mainly consist of?
16
What is the name of the process to change light into a digital image in a camera?
คำตอบ(A)
ADC (Analog to digital conversion).
17
What is a disadvantage of resistive touchscreens?
18
What is the primary function of a firewall?
คำตอบ(D)
To filter network traffic and prevent unauthorized access.
19
What is the purpose of the Interrupts?
คำตอบ(B)
To signal the CPU to stop the current process to handle a request.
20
In a DVD, what is the primary function of the spiral track?
21
What is a key advantage of DLP projectors over LCD projectors?
คำตอบ(B)
They offer higher contrast ratios.
22
What is the role of the Memory Data Register (MDR) in the read operation from memory?
คำตอบ(B)
To store the data being read from memory.
23
What are some advantages of using cloud storage? (Select two)
24
Where are the barcodes commonly used?
25
What is the purpose of the address bus?
คำตอบ(A)
To carry the address of the memory location being accessed.
26
What is the main function of a computer tomography scanner?
คำตอบ(A)
To create a 3D image of a solid object.
27
Which technology is most closely associated with the instruction set architecture?
คำตอบ(B)
Central Processing Unit (CPU)
28
What is a benefit of an ergonomic keyboard?
คำตอบ(C)
It helps prevent repetitive strain injuries.
29
What is the function of the diaphragm inside a microphone?
คำตอบ(A)
To create an electrical current.
30
What does a microphone transform sound waves into?
31
What type of technology does Bluetooth utilize for communication?
32
How is the resolution of an image determined in a DLP projector?
คำตอบ(C)
The number of micro-mirrors on the DMD chip.
33
Which element in a microphone is responsible for converting sound to electrical signals?
34
In the car embedded system example, what is an example of an *input*?
คำตอบ(D)
The interface panel buttons.
35
What is the key technology used in SSDs to store data?
36
What is the function of a sensor in a system?
คำตอบ(D)
To measure a physical property.
37
What is the primary advantage of projective capacitive touchscreens?
38
What is the significance of a MAC address?
คำตอบ(B)
It's the unique physical address of a network interface card.
39
What is the purpose of a DNS server?
คำตอบ(B)
To translate domain names into IP addresses.
40
The Central Processing Unit (CPU) is best described as:
คำตอบ(C)
The primary component responsible for executing instructions.
41
What technology is used in OLED displays to create their own light?
42
In a laser printer, how is the image formed?
คำตอบ(C)
A laser beam draws the image onto a drum.
43
What is an advantage of an ergonomic keyboard?
คำตอบ(B)
Prevents repetitive strain injuries.
44
What are the stages involved in printing using a laser printer?
45
What is the unique identifier assigned to a network interface card (NIC)?
46
What is the primary function of the Memory Management Unit (MMU)?
คำตอบ(B)
To translate logical addresses to physical addresses.
47
What type of information can be extracted from a scanned 3D image?
48
In a digital camera, what are the cells of an image sensor made of?
คำตอบ(B)
Photosensitive materials.
49
Which technology is generally associated with more vibrant colors and deeper blacks in display screens?
50
What does the fuser unit in a laser printer do?
คำตอบ(B)
Melts the toner and bonds it to the paper.
