Computer Science for IGCSE & O level - Hardware (Section 22)
1
Which feature is an advantage of DLP projectors?
отговор
(C)
Higher contrast.
2
What type of signal is used to read information from the memory?
отговор
(C)
Read Signal
3
What is an operand in the context of an instruction set?
отговор
(B)
The data or the location of the data the operation acts upon.
4
Which component of the CPU is responsible for fetching instructions?
отговор
(B)
Control Unit
5
What is the primary function of the DMD chip in a DLP projector?
отговор
(A)
To generate the image.
6
What is the primary method used by a 2D scanner?
отговор
(B)
Reading a paper document and converting it to an electronic format.
7
What is the main advantage of using a blue laser in Blu-ray discs compared to a red laser in DVDs?
отговор
(B)
Higher storage capacity.
8
Which device acts as a gateway between a LAN and the Internet?
отговор
(C)
Router
9
Which of the following are typically found in a CPU?
отговор
A
B
C
10
What is the main purpose of a router in a network?
отговор
(C)
To forward data packets between different networks.
11
What are the functions of a Router?
отговор
A
B
D
12
In the context of an embedded system in a vending machine, which component typically *outputs* information?
отговор
(C)
The LED display.
13
Which of the following best describes virtual memory?
отговор
(B)
A portion of the hard drive that is used as an extension of RAM.
14
What technology is used in 2D scanners to produce electronic forms?
отговор
(B)
Reading paper document and converting it to an electronic format
15
What is the function of the drum in a laser printer?
отговор
(B)
To apply an electrical charge that attracts toner.
16
Which term refers to the number of bits that a processor can process at one time?
отговор
(B)
Word size
17
In a barcode, what is the meaning of the width variations between the lines and spaces?
отговор
(B)
Representing different digits.
18
What is the primary difference between SRAM and DRAM?
отговор
(A)
SRAM uses flip-flops, DRAM does not.
19
In an optical mouse, which element emits light onto the surface?
отговор
(C)
LED
20
Which part of a loudspeaker vibrates to create sound?
отговор
(C)
The cone
21
Which of the following components is responsible for converting light into electrical charges in a digital camera?
отговор
(C)
The image sensor.
22
What is one advantage of OLED technology over traditional LED screens?
отговор
(C)
Can be made thinner and more flexible.
23
What happens to the ink when using thermal bubble technology?
отговор
(B)
It is heated to create a bubble, then ejected.
24
In a central heating system, what is the role of the thermostat?
отговор
(B)
To measure and set the desired temperature.
25
What is the relationship between the MAC address and the IP address?
отговор
(C)
MAC addresses are physical addresses and IP addresses are logical addresses used for network routing.
26
Which component is involved in both reading from and writing to memory?
отговор
(B)
Data bus
27
What is the primary advantage of SSDs compared to traditional HDDs in terms of data access?
отговор
(B)
They offer faster access times.
28
How does an inkjet printer apply colorant to the paper?
отговор
(C)
By spraying ink droplets.
29
What is a primary advantage of an SSD over an HDD, related to data access?
отговор
(C)
Faster read/write speeds
30
What is the primary function of the 'fuser' in a laser printer?
отговор
(B)
To melt the toner onto the paper
31
What is the purpose of a face recognition system?
отговор
(B)
To identify a person's face.
32
What is the purpose of the red LED in an optical mouse?
отговор
(A)
To illuminate the surface.
33
What is a potential consequence of overheating a CPU?
отговор
(B)
System instability.
34
Which components of a digital camera are responsible for image capturing?
отговор
A
B
D
35
What are the advantages of using QR codes?
отговор
A
B
C
36
What is the key function of the amplifier in an audio system?
отговор
(C)
To increase the signal strength.
37
What is a common application of embedded systems?
отговор
(C)
Security systems.
38
In the context of flash memory, what is the purpose of the floating gate?
отговор
(A)
To store the charge representing a bit's value.
39
What are the main advantages of capacitive touchscreens?
отговор
A
D
40
What are the three main types of cables mentioned in the text?
отговор
A
C
D
41
What type of signal does a microphone typically output?
отговор
(B)
Analog
42
What is the function of cache memory?
отговор
(A)
To store frequently used data and instructions, speeding up access.
43
In the context of laser printers, which component applies a charge to the paper that attracts toner?
отговор
(A)
The drum
44
Which material is typically used to make the cone of a loudspeaker?
отговор
(B)
Paper or synthetic material
45
Which of the following is a common benefit of using cache memory?
отговор
(B)
Faster access to data and instructions.
46
What are some examples of features used in face recognition?
отговор
A
B
D
47
What is the function of a DHCP server?
отговор
(C)
To automatically assign IP addresses to devices.
48
In a hard drive, what does seek time refer to?
отговор
(B)
The time for the read/write head to move to the correct track.
49
What happens to the paper after the toner is applied in a laser printer?
отговор
(B)
It is sent to the fuser unit.
50
In what order are the steps taken by a printer as it prints a document?
отговор
(A)
The data from the document is sent to the printer driver; the printer driver interprets the data, a sheet of paper is fed into the printer; the printer applies the colorant to the paper, and the page is printed.
