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Which of the following are true statements? I: Primary storage units have faster access time and less storage capacity as compared to the secondary storage units. II: Primary storage units have sequential access. III: Secondary storage units are non-volatile storage.

Which of the following are true statements? I: Primary storage units have faster access time and less storage capacity as compared to the secondary storage units. II: Primary storage units have sequential access. III: Secondary storage units are non-volatile storage. Correct Answer <span style="">I and III only</span>

The correct answer is I and III only.

Key Points

  • Primary storage units have faster access time and less storage capacity as compared to secondary storage units.
    • Primary storage is faster and more expensive than secondary storage.
    • It is small in size, lightweight, but at the same time quite expensive.
  • Secondary storage units have sequential access.
    • In computing, sequential access memory (SAM) is a class of data storage devices that read stored data in a sequence.
    • This is in contrast to random access memory (RAM) where data can be accessed in any order.
    • Sequential access devices are usually a form of magnetic storage or optical storage.
  • Secondary storage units are non-volatile storage.
    • Secondary storage is non-volatile, long-term storage.
    • Without secondary storage, all programs and data will be lost as soon as the computer is turned off.
    • There are three main types of secondary storage in computer systems: solid-state storage devices, such as USB memory sticks.

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