Computer Science for IGCSE & O level - Hardware (Section 25)
1
Which component is used in a loudspeaker to convert electrical signals into sound?
2
In a lighting system with an embedded system, which of the following is an example of an *output*?
Απάντηση(D)
The lights turning on or off.
3
Which of these components are present in a Resistive touchscreen?
Απάντηση(C)
A layer of transparent electrode layer.
4
In the context of street lighting control, the light sensor provides data that changes based on:
5
Which technology allows a computer to run more applications or handle larger data sets than its physical RAM would otherwise permit?
6
What is a MAC address used for?
Απάντηση(B)
Uniquely identifying a device on a local network.
7
What type of memory is best for storing the operating system when the computer is turned off?
8
What is the significance of the MAC address?
Απάντηση(D)
It is unique to each device and used on a local network.
9
In the context of cloud storage, what is meant by the term 'redundancy'?
Απάντηση(A)
The duplication of data across multiple servers.
10
In the context of 3D printing, what does the term "additive manufacturing" primarily refer to?
Απάντηση(B)
Building an object layer by layer.
11
What is the type of printing technology that uses nozzles?
12
What is the purpose of the actuator arm in a hard drive?
Απάντηση(B)
To position the read/write heads
13
What is the primary purpose of the embedded system in a security system?
Απάντηση(C)
To receive information from sensors and react accordingly.
14
What does 'LAN' stand for in networking?
15
What is the primary function of an SSD's controller?
Απάντηση(C)
To manage flash memory and the file system.
16
What is the primary advantage of SRAM over DRAM?
17
How does the use of virtual memory benefit a computer system?
18
Which of the following best describes a hybrid cloud?
Απάντηση(C)
A combination of public and private cloud environments.
19
What are the advantages of storing your data in the cloud? (Select two)
20
Which of the following is an example of an I/O interface?
21
What is a potential advantage of using a laser printer over an inkjet printer?
22
Which of the following factors does NOT influence how lighting is controlled by an embedded system in a lighting system?
Απάντηση(D)
The type of light bulbs used.
23
What does the microphone convert sounds into?
24
What is the primary function of a capacitor in a DRAM chip?
Απάντηση(A)
To store bits of information (0 or 1).
25
What is the function of a network interface card (NIC)?
Απάντηση(B)
To connect a device to a network.
26
What type of scanner is best suited for creating 3D models?
27
Which of the following are key advantages of OLED over LED technology?
28
What is the purpose of the accumulator?
Απάντηση(C)
To store the results of calculations.
29
In computer systems, what is the function of virtual memory?
Απάντηση(B)
To allow more programs to run than physical RAM allows.
30
What does the barcode system do when an item runs low?
Απάντηση(B)
The product is reordered.
31
What does the term MAC address refer to?
Απάντηση(A)
Media Access Control address
32
Which component manages the flow of data within the CPU?
33
What happens in a thermal bubble (used in inkjet printers)?
Απάντηση(A)
Ink is heated and vaporized creating a bubble that ejects ink
34
What is the role of the Instruction Set Architecture (ISA)?
Απάντηση(B)
To define the instructions that a CPU can execute.
35
What are two main types of wired network cables?
36
What happens to the electric current produced by a microphone?
Απάντηση(A)
It is amplified and sent to a recording device.
37
Which of the following is a benefit of an optical mouse over a mechanical mouse?
38
What is the role of the red light in the optical mouse?
Απάντηση(C)
To illuminate the surface.
39
What type of memory is used to store the BIOS (Basic Input/Output System)?
40
What are the two main types of RAM technology?
41
What is the purpose of a DNS server?
Απάντηση(B)
To translate domain names into IP addresses.
42
What are some of the functions of an embedded system in a car?
43
What are some advantages of using cache memory?
44
What is the function of the diaphragm in a microphone?
Απάντηση(B)
To convert sound waves into electrical signals.
45
What is an example of a disadvantage of cloud storage?
46
What are two benefits of cloud storage? (Select two)
47
What is the purpose of the 'refresh' process in DRAM?
Απάντηση(B)
To prevent data loss by re-charging the capacitors.
48
Which layer is the conductive layer in the capacitive touch screen composed of?
Απάντηση(B)
A flexible transparent coating.
49
What key component is responsible for translating logical addresses into physical addresses in a computer's memory system?
50
Which types of storage are classified as secondary storage?
