Ch. 3 IGCSE ICT

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Ch. 3 IGCSE ICT - Quiz

Storage Devices and Media


Questions and Answers
  • 1. 

    Write an advantage of magnetic tape over magnetic disk.

  • 2. 

    Type of access used by Magnetic disk

    • A.

      Serial

    • B.

      Direct

    Correct Answer
    B. Direct
    Explanation
    The correct answer is "Direct" because magnetic disks allow direct access to data, meaning that any part of the disk can be accessed directly without having to read through all the preceding data. This is in contrast to serial access, where data is accessed sequentially in a linear fashion. Direct access is faster and more efficient for random access and retrieval of data from a magnetic disk.

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  • 3. 

    Which is not the advantage of blu ray disk over DVD?

    • A.

      It uses blue laser

    • B.

      Birefringence

    • C.

      Secure encryption

    • D.

      Relatively expensive

    Correct Answer
    D. Relatively expensive
    Explanation
    The correct answer is relatively expensive. Blu-ray disks are known to be more expensive compared to DVDs. This is because the technology used in Blu-ray disks, such as the blue laser, allows for higher storage capacity and better video and audio quality. However, this advanced technology comes at a higher cost, making Blu-ray disks relatively expensive compared to DVDs.

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  • 4. 

    Magnetic tapes cannot be used for real time processing as it's data .......................... time is very slow.

    Correct Answer
    access
    Explanation
    Data transfer is fast .

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  • 5. 

    .................................... Refers to the copying of files to a different medium incase of a problem with the main secondary storage device.

    Correct Answer
    Backing up
    Explanation
    Backing up refers to the process of creating copies of files and data from a main secondary storage device to a different medium. This is done as a precautionary measure in case there is a problem with the main storage device, such as data loss, corruption, or hardware failure. By regularly backing up files, individuals and organizations can ensure that their important data is safe and can be easily restored if needed.

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  • 6. 

    CD RW is the best media to distribute free software .

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    CD ROM should be used as CD RW is expensive .

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  • 7. 

    Which storage device should be used to store a high definition movie of two hours needing storage capacity of 25 GB.

    • A.

      Blu-ray disc

    • B.

      DVD

    • C.

      Hard Disk

    • D.

      CD

    Correct Answer
    A. Blu-ray disc
    Explanation
    A Blu-ray disc should be used to store a high definition movie of two hours needing a storage capacity of 25 GB. Blu-ray discs have a larger storage capacity compared to DVDs, CDs, and hard disks. They can hold up to 25 GB (single-layer) or 50 GB (dual-layer) of data, making them ideal for storing large files such as high definition movies.

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  • 8. 

    How does the laser wavelength  affect the storage capacity of a media?

    • A.

      Shorter the wavelength lesser the storage capacity

    • B.

      Shorter the wavelength greater the storage capacity

    • C.

      Does not matter

    Correct Answer
    B. Shorter the wavelength greater the storage capacity
    Explanation
    The laser wavelength affects the storage capacity of a media because shorter wavelengths allow for more data to be packed into a given space. This is because shorter wavelengths have a higher frequency and can therefore encode more information per unit of space. Therefore, shorter wavelengths result in greater storage capacity.

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