CD-ROM is a ______.

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NTPC CBT 2 2016 Previous Paper 2 (Held On: 17 Jan 2017 Shift 2)
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  1. MP3 file
  2. Microprocessor
  3. Magnetic disk
  4. Storage medium

Answer (Detailed Solution Below)

Option 4 : Storage medium
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Detailed Solution

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The correct answer is  Storage medium.

Key Points

  • CD-ROM, an abbreviation of compact disc read-only memory, type of computer memory in the form of a compact disc that is read by optical means.
  • A CD-ROM drive uses a low-power laser beam to read digitized (binary) data that has been encoded in the form of tiny pits on an optical disk.
  • The drive then feeds the data to a computer for processing.
  • With a storage capacity of 680 megabytes, the CD-ROM found rapid commercial acceptance as an alternative to so-called floppy disks.
  • Unlike conventional magnetic storage technologies (e.g., tapes, floppy disks, and hard disks), CDs and CD-ROMs are not recordable hence the tag “read-only.”

Additional Information

  • MP3 File:
    • MP3 (MPEG-1 Audio Layer-3) is a standard technology and format for compressing a sound sequence into a very small file while preserving the original level of sound quality when it is played.
    • MP3 provides near CD-quality audio.
    • It is one of the most common music file types.
  • Microprocessor:
    • A microprocessor is an electronic component that is used by a computer to do its work.
    • It is a central processing unit on a single integrated circuit chip containing millions of very small components including transistors, resistors, and diodes that work together.
  • Magnetic Disk:
    •  A magnetic disk is a storage device that uses a magnetization process to write, rewrite, and access data.
    • It is covered with a magnetic coating and stores data in the form of tracks, spots, and sectors.
    • Hard disks, zip disks, and floppy disks are common examples of magnetic disks.
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