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