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Computer Science for IGCSE & O level - Hardware (Section 27)

  • 1
    In the context of embedded systems in a car, which of the following functions is NOT typically handled by an embedded system?
    Відповідь
    (D)
    Providing weather updates via satellite communication
  • 2
    What does the MAC address uniquely identify?
    Відповідь
    (D)
    A network interface.
  • 3
    What is a common use of coaxial cable?
    Відповідь
    (B)
    Connecting to the internet via cable modem
  • 4
    Which of the following is NOT a key component of a typical laser printer?
    Відповідь
    (B)
    Ink cartridge
  • 5
    Which steps are involved when producing sound from digital data through a loudspeaker?
    Відповідь
    A
    B
    D
  • 6
    What is the function of the red light-emitting diode (LED) in an optical mouse?
    Відповідь
    (B)
    To illuminate the surface.
  • 7
    What is the main advantage of using flash memory in SSDs compared to traditional HDDs?
    Відповідь
    (A)
    Lower power consumption and faster access times.
  • 8
    Which of the following describes a characteristic of a static IP address?
    Відповідь
    (C)
    Does not change unless manually changed.
  • 9
    What is the function of the actuator arm in an HDD?
    Відповідь
    (B)
    To position the read/write heads.
  • 10
    Which component is responsible for converting the signal from the cable (e.g. coaxial or fiber optic) to a signal that computers can understand?
    Відповідь
    (C)
    Modem
  • 11
    In the greenhouse control example, the computer receives a signal if the humidity falls below a pre-set value. What is the computer likely to do in response?
    Відповідь
    (C)
    Spray water to increase humidity.
  • 12
    After light passes through the lens of a digital camera, what is the next step in image creation?
    Відповідь
    (B)
    The light hits the image sensor.
  • 13
    Which of these are applications for sensors?
    Відповідь
    A
    B
    C
  • 14
    In the Von Neumann architecture, what is the primary function of the Control Unit?
    Відповідь
    (C)
    To fetch instructions from memory and direct operations.
  • 15
    Which part of the keyboard helps to identify a character and send it to the CPU?
    Відповідь
    (A)
    The membrane or circuit board.
  • 16
    What type of device is used to record and output data for the vending machine?
    Відповідь
    (B)
    An LED display
  • 17
    When referring to a network interface, what is a MAC address primarily used for?
    Відповідь
    (B)
    Uniquely identifying a device on a local network.
  • 18
    In an embedded system, which of the following is NOT a typical component?
    Відповідь
    (D)
    A graphical user interface (GUI).
  • 19
    What is a key difference between IPv4 and IPv6 in terms of address length?
    Відповідь
    (C)
    IPv6 uses longer addresses.
  • 20
    What do the 3D coordinates from a 3D scanner represent?
    Відповідь
    (D)
    The location of a series of points.
  • 21
    Which component is primarily responsible for storing the operating system when a computer is turned off?
    Відповідь
    (D)
    Hard Drive
  • 22
    What does SSD stand for?
    Відповідь
    (A)
    Solid State Drive
  • 23
    In face recognition software, how is each face often analyzed?
    Відповідь
    (B)
    By comparing two digital images using face recognition software.
  • 24
    What is the primary function of a microphone diaphragm?
    Відповідь
    (C)
    To vibrate in response to sound waves.
  • 25
    Which component in an HDD is responsible for reading and writing data?
    Відповідь
    (C)
    Read/write head
  • 26
    Which of the following statements best describes the function of a router?
    Відповідь
    (C)
    Connects different networks and forwards data packets.
  • 27
    What is the function of a switch in a local area network (LAN)?
    Відповідь
    (C)
    To connect devices and forward data packets based on MAC addresses.
  • 28
    Which step in laser printing prepares the drum to receive the toner?
    Відповідь
    (C)
    Applying a uniform charge to the drum
  • 29
    What is a key function of a computer within a greenhouse environment control system?
    Відповідь
    (C)
    To monitor and adjust the greenhouse environment.
  • 30
    What is the primary advantage of solid-state drives (SSDs) over Hard Disk Drives (HDDs) in terms of performance?
    Відповідь
    (C)
    SSDs have significantly faster access times.
  • 31
    What are some examples of storage devices used to provide virtual memory?
    Відповідь
    (B)
    SSD/HDD
  • 32
    Which of the following protocols is used by DHCP to automatically assign IP addresses?
    Відповідь
    (C)
    DHCP
  • 33
    In the context of computer memory, what does the acronym 'MAR' stand for?
    Відповідь
    (B)
    Memory Address Register
  • 34
    What is meant by rotational latency in an HDD?
    Відповідь
    (C)
    The time it takes for the desired sector to rotate under the read/write head.
  • 35
    What kind of signals does the amplifier use to drive the loudspeaker?
    Відповідь
    (B)
    Analog signals
  • 36
    Which of the following storage media uses a shorter wavelength light to achieve higher storage density?
    Відповідь
    (C)
    Blu-ray
  • 37
    What component in a loudspeaker vibrates in response to electrical signals, creating sound waves?
    Відповідь
    (C)
    The cone
  • 38
    What are the key differences between SRAM and DRAM?
    Відповідь
    (C)
    SRAM is faster and more expensive than DRAM.
  • 39
    What is a key characteristic that distinguishes DVD-Rs from DVD+Rs?
    Відповідь
    (B)
    The way the data is written.
  • 40
    What happens after a sound goes to a microphone?
    Відповідь
    (B)
    The sound is converted to an electrical current.
  • 41
    What is the function of the print head in an inkjet printer?
    Відповідь
    (B)
    To spray the ink droplets onto the paper.
  • 42
    What is an advantage of embedded systems being dedicated to a specific task?
    Відповідь
    (B)
    They can be more energy-efficient and optimized for that task.
  • 43
    What type of memory is commonly used to store the operating system and applications when the computer is turned on?
    Відповідь
    (C)
    RAM
  • 44
    What are the inputs of the embedded system within the vending machine?
    Відповідь
    A
    B
    D
  • 45
    Which device is primarily used to convert a digital signal into an analog signal in an audio system?
    Відповідь
    (C)
    DAC
  • 46
    Which of the following is an advantage of using an SSD over a traditional HDD?
    Відповідь
    (C)
    Faster data access times.
  • 47
    Which type of memory is used for the temporary storage of data and instructions that the CPU needs to access quickly?
    Відповідь
    (C)
    RAM
  • 48
    What is the primary difference between a hard disk drive (HDD) and a solid-state drive (SSD) regarding data storage?
    Відповідь
    (C)
    HDDs use magnetic platters, while SSDs use flash memory.
  • 49
    What is a significant advantage of SSDs (Solid State Drives) over HDDs (Hard Disk Drives) in terms of performance?
    Відповідь
    (C)
    Faster access times.
  • 50
    Which of the following best describes a static IP address?
    Відповідь
    (C)
    An address manually configured and does not change unless updated.