Computer Science for IGCSE & O level - Hardware (Section 30)
1
Which of the following is an example of a control application using sensors?
Одговорити(C)
Turning on streetlights at dusk.
2
What type of memory is used for the temporary storage of data that the CPU actively uses?
3
What device applies the toner to the paper in a laser printer?
4
Where are the barcodes most commonly used?
5
How is the picture taken when the photograph is taken?
Одговорити(B)
The light passes through the lens.
6
Which of the following statements is true about OLED technology?
7
In the context of a computer system, what does 'word' refer to?
Одговорити(B)
A group of bits that can be transported as a single unit.
8
In a microphone, what is the purpose of the copper coil?
Одговорити(C)
To create an electric current when it moves within a magnetic field.
9
What is the role of the ALU in the Fetch-Decode-Execute cycle?
Одговорити(C)
Performing calculations and logical operations.
10
What are the steps in printing an image?
11
What is the primary purpose of an IP address?
Одговорити(B)
To route data packets between networks.
12
What type of signal is used to drive a loudspeaker?
13
What determines the storage capacity of a DVD?
14
Which type of memory allows faster access to frequently used data and instructions?
15
What is a key characteristic that differentiates an IPv6 address from an IPv4 address?
Одговорити(C)
IPv6 provides a larger address space.
16
What are some characteristics that define embedded systems?
17
What is the role of the Memory Data Register (MDR)?
Одговорити(B)
Holds the data that is being read from or written to memory.
18
In a greenhouse environment control system, what sensors are used to measure the climate condition?
19
What are some applications of 3D scanners mentioned in the text?
20
What is an advantage of using SSDs over HDDs?
21
What is the key difference between inkjet and laser printers?
Одговорити(C)
Inkjet uses ink; laser uses toner and heat.
22
What are some advantages of using a wired network connection?
23
What is the role of the current instruction register (CIR)?
Одговорити(B)
To store the instruction being currently decoded.
24
In 3D printing, what is the purpose of 'support structures'?
Одговорити(D)
To provide a base for overhanging features.
25
Which of the following is a type of sensor?
26
What happens during the 'execute' stage of the Fetch-Decode-Execute cycle?
Одговорити(C)
The instruction is carried out by the CPU.
27
What type of printing technology uses nozzles to spray ink?
28
What is a key disadvantage of QR codes?
Одговорити(B)
They can transmit malicious code.
29
What is the primary purpose of the control gate in a flash memory cell?
Одговорити(B)
To control the movement of electrons in the floating gate.
30
What type of display uses organic light emitting diodes?
31
What is a key advantage of SSDs over traditional HDDs?
Одговорити(C)
Faster data access times.
32
Which of the following best describes the role of the DAC in a sound system?
Одговорити(B)
To convert a digital signal into an analog signal.
33
In the context of barcodes, what is represented by the number of dark elements?
34
In an anti-lock braking system (ABS), what happens if the wheels are locking up?
35
What is the main difference between a switch and a router?
Одговорити(A)
A switch connects devices within a network; a router connects networks.
36
Which type of display technology relies on self-emissive organic compounds?
37
How is a character converted into a digital signal in a keyboard?
Одговорити(B)
Each character is assigned to a unique ASCII value which represents the digital signal.
38
What happens to stock levels when a barcode is scanned?
Одговорити(C)
The number of stock items is reduced.
40
What is the purpose of the Memory Address Register (MAR) during a write operation?
Одговорити(B)
To hold the address of the memory location where data will be written.
41
In a central heating system, what is the role of the gas valve?
Одговорити(B)
To regulate the flow of gas to the heater.
42
What is one of the features of the barcode system, as it relates to stock?
Одговорити(C)
If it is at or below a pre-defined value, more stock is automatically ordered.
43
In the context of virtual memory, what is the role of the hard drive or SSD?
Одговорити(B)
To store inactive data, acting as an extension of RAM.
44
What is the main benefit of the shorter wavelength blue laser in Blu-ray discs?
45
What is the primary function of the control gate in a flash memory cell?
Одговорити(B)
To control the flow of electrons.
46
What is the main disadvantage of resistive touchscreens?
Одговорити(B)
They have lower touch sensitivity.
47
What is the purpose of the actuator arm in a hard drive?
Одговорити(C)
To position the read/write heads over the correct track
48
What are the components involved in writing to a flash memory cell?
49
What is a significant advantage of Blu-ray over DVD?
Одговорити(C)
Blu-ray discs have a higher storage capacity.
50
What is the primary security concern when using cloud storage?
Одговорити(B)
Data breaches and unauthorized access.
