Computer Science for IGCSE & O level - Hardware (Section 21)
1
What are the key advantages of SSDs compared to HDDs? (Select all that apply)
คำตอบ
A
C
D
2
In the context of network communications, what is the primary purpose of an IP address?
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(B)
To route data packets between different networks.
3
What is a crucial advantage of DRAM over SRAM regarding cost?
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(C)
DRAM is less expensive.
4
Which of these are examples of output devices?
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A
C
5
What is a key characteristic of embedded systems?
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(C)
They are often designed to perform a specific task or set of tasks.
6
Which of the following is an advantage of using QR codes compared to traditional barcodes, as mentioned in the text?
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(A)
QR codes are less likely to get damaged.
7
In a computer, what are the components used to manage the execution of instructions?
คำตอบ
A
B
C
8
Which part of the CPU performs arithmetic operations?
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(C)
ALU
9
What is the function of the Memory Data Register (MDR) during a write operation?
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(B)
To hold the data that is to be written to memory.
10
What are key characteristics of Ethernet networks?
คำตอบ
A
B
D
11
What does the term 'latency' refer to in the context of computer storage?
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(B)
The time it takes to access a specific piece of data.
12
What is the function of the clock speed?
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(B)
To synchronize and determine how many instructions the CPU can execute per second.
13
What technology is often used to make a touchscreen?
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(C)
Capacitive
14
Which term describes the process of a CPU retrieving an instruction from memory?
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(C)
Fetching
15
What is the main function of a Memory Management Unit (MMU)?
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(B)
To convert logical addresses to physical addresses.
16
Which stage occurs after the paper passes through a fuser (in laser printing)?
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(B)
The paper is ejected from the printer.
17
What kind of display technology uses organic compounds that emit light when electricity is applied?
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(C)
OLED
18
Which type of memory retains its data even when the power is turned off?
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(D)
SSD
19
In a microphone, what happens to the vibrations of the diaphragm?
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(C)
They are converted into electrical signals.
20
What type of radiation is used by CT scanners to create images?
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(B)
X-rays
21
What is a benefit of using a USB 3.0 port compared to a USB 2.0 port?
คำตอบ
(A)
USB 3.0 ports have faster data transfer rates.
22
Which of the following are used by a router to connect devices together?
คำตอบ
A
B
D
23
In a laser printer, what process is used to apply the toner to the paper?
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(C)
Electrostatically charged toner.
24
Which 3D printing method involves using a liquid resin that is solidified by light?
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(B)
Stereolithography (SLA)
25
Which of the following correctly describes the role of a sensor?
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A
D
26
Which type of memory is generally used for temporary storage during processing?
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(C)
Random Access Memory (RAM)
27
What are some benefits of using embedded systems?
คำตอบ
A
B
28
What are some potential advantages of using multi-core processors?
คำตอบ
A
D
29
What is a primary function of the Central Processing Unit (CPU)?
คำตอบ
(B)
To execute instructions.
30
Which of these are advantages of OLED technology compared to LED?
คำตอบ
A
C
D
31
Which of the following is true regarding the relationship between the CPU and Virtual Memory?
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(A)
Virtual memory allows the CPU to address more memory than is physically available.
32
What does the abbreviation 'ALU' stand for?
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(B)
Arithmetic Logic Unit
33
In a greenhouse environment control system, the computer receives signals from various sensors. Which sensor is NOT explicitly mentioned in the context of controlling the greenhouse environment?
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(D)
Wind Speed
34
What is the main advantage of a dual-layer Blu-ray disc over a single-layer Blu-ray disc?
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(B)
Increased storage capacity.
35
What term describes the process of building an object layer by layer in 3D printing?
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(B)
Additive manufacturing
36
What is a significant security risk associated with cloud storage?
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(B)
Data breaches and unauthorized access.
37
What distinguishes Blu-ray technology from DVD technology?
คำตอบ
A
B
38
What happens once a barcode has been read and the stock item is found in the database?
คำตอบ
A
C
39
What is the role of the Memory Management Unit (MMU) in a computer's memory system?
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(B)
To translate logical addresses into physical addresses.
40
In the example of the central heating system, what does the system utilize to ensure the temperature stays at a comfortable level?
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(C)
A thermostat
41
What is the function of a network interface card (NIC)?
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(B)
To allow a device to connect to a network.
42
In the context of laser printing, which component is responsible for creating the latent image on the drum?
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(B)
The laser
43
What determines how long it takes for a specific piece of data to be retrieved from a hard drive?
คำตอบ
A
B
C
44
What are some examples of monitoring applications that use sensors?
คำตอบ
A
B
D
45
Which bus transmits the address of a memory location?
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(C)
Address bus
46
What type of technology is used in CT scanners?
คำตอบ
(A)
X-rays
47
Which is an output of a digital camera's analog to digital conversion process?
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(D)
A file format that contains a digital representation of an image.
48
Which type of network cable is generally faster than twisted pair cable?
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(B)
Fiber optic cable
49
What components are typically found in embedded systems?
คำตอบ
A
B
C
50
What is the purpose of the 'execute' phase in the Fetch-Decode-Execute cycle?
