Computer Science for IGCSE & O level - Hardware (Section 24)
1
In the context of data transmission speed, what is 'bandwidth' primarily referring to?
إجابة(B)
The maximum rate of data transfer over a network or connection.
2
Which part of an inkjet printer sprays the ink?
3
Which of the following is NOT a function of the Control Unit?
إجابة(D)
Performing arithmetic calculations.
4
How does an SSD typically store data?
5
Which physical components store data on a traditional hard drive (HDD)?
6
Which component is responsible for the 'boot-up' instructions in a computer?
7
In a lighting system with an embedded system, what are the inputs that influence the lighting control?
8
Which of the following is NOT a touch screen technology mentioned?
9
Which of the following is NOT a typical input device?
10
In a security system, what type of sensor might be used to detect a broken window?
11
What is converted into electrical signals in a microphone?
12
What is the primary disadvantage associated with the use of virtual memory?
إجابة(B)
Slowdowns due to excessive swapping (thrashing).
13
Which component of a digital camera processes information from the image sensor?
14
Which of the following is used in the 3D scanning process?
15
What is the minimum storage capacity of a dual layer blu-ray disc?
16
Which of the following are advantages of using a static IP address?
إجابة(A)
Easier to manage for servers and websites
17
What component in a loudspeaker generates the magnetic field?
18
Which of the following is a feature of the Von Neumann architecture?
إجابة(B)
Instructions and data stored in the same memory space.
19
In the central heating system example, what does the temperature sensor provide?
إجابة(C)
Data on the current temperature.
20
What are some disadvantages of static IP addresses?
21
What are some disadvantages of an LCD projector?
إجابة(A)
Lower native contrast ratio than DLP projectors.
22
In an SSD, which component is responsible for managing the data storage and retrieval on the flash memory?
23
What are the primary components involved in storing data on an HDD?
إجابة(B)
Platters and read/write heads.
24
In a digital camera, what happens to the analog electric charges?
إجابة(B)
They are converted to binary information to be stored.
25
Which of the following best describes 'slicing' in the context of 3D printing?
إجابة(B)
Dividing the 3D model into thin horizontal layers.
26
What is the difference between twisted pair and fiber optic cables?
إجابة(D)
Twisted pair uses electrical signals, fiber optic uses light signals and is less susceptible to interference.
27
What component in a modern computer converts a logical address into a physical memory address?
إجابة(C)
Memory Management Unit (MMU)
28
What is the function of a floating gate in flash memory?
إجابة(B)
To store the charge that represents data.
29
What is the main risk associated with using cloud storage?
30
Which of the following is considered primary memory?
31
What is the primary function of the Program Counter (PC)?
إجابة(B)
To hold the address of the next instruction.
32
In central heating systems, what action is taken if the temperature reading is below the preset value?
إجابة(C)
A signal is sent to the heater.
33
Which of the following components physically stores data on a traditional HDD?
34
How does a network interface card (NIC) allow a computer to connect to a network?
إجابة(B)
By assigning a MAC address.
35
If the barcode is not read, what does the checkout system check for?
إجابة(B)
The product code is entered manually.
36
What is the main advantage of using fiber optic cables over copper cables?
إجابة(C)
Higher bandwidth and less interference
37
What are the advantages of using a QR code?
38
In a microphone, what does the electric current output resemble?
39
What is the primary function of RAM (Random Access Memory)?
إجابة(C)
To store the data and instructions that the CPU is actively using.
40
Which of the following best describes a 'word' in a computer system?
إجابة(B)
A group of bits processed as a unit.
41
What is a disadvantage of capacitive touchscreens?
إجابة(C)
They can be affected by electromagnetic radiation.
42
What is a disadvantage of a hybrid cloud?
إجابة(B)
It's more expensive to manage and maintain.
43
Which of the following is a characteristic of OLED technology?
44
What type of bus transmits control signals within a computer system?
45
What is the primary function of the transfer roller in a laser printer?
إجابة(B)
To transfer the toner from the drum to the paper.
46
How does a resistive touch screen work?
47
In a laser printer, what step occurs immediately after the toner is transferred to the paper?
إجابة(B)
The paper is heated by the fuser.
48
What type of printing process builds objects layer by layer, using a laser to fuse powdered material?
إجابة(C)
Selective Laser Sintering (SLS)
49
What type of code is the quick response (QR) code?
50
Which printer technology uses nozzles?
