What is the difference between sequential and random read/write storage?

Question

Options

• ASequential read/write is best for notebooks, while random read/write is best for desktops.
• BSequential read/write Is best for large file access, while random read/write Is best for
• CSequential read/write is best for desktops, wnile random read/writeisbest for notebooks.
• DSequential read/write is best for database access or small updates to large files, while

• A
  2% (1)
• B
  4% (2)
• C
  5% (3)
• D
  89% (50)

Explanation

Option D correctly distinguishes the use cases based on access patterns, not device type. Sequential read/write accesses data in contiguous blocks, making it ideal for large, uninterrupted file transfers - like streaming video, backups, or reading a large dataset from start to finish. Random read/write jumps to arbitrary storage locations, which is why it excels at database queries, OS operations, and small scattered updates where data is spread across a disk.

Why the distractors fail:

• A and C are both wrong for the same reason - desktop vs. notebook is a hardware form factor distinction that has nothing to do with sequential vs. random I/O patterns. Any device can use either access method depending on the workload.
• B appears to get the large-file/sequential relationship partially right, but D provides the more complete and precise pairing, specifically naming databases and small-update scenarios as the home of random access.

Memory tip: Think of sequential as a highway (fast, straight, uninterrupted - great for moving big loads) and random as city driving (frequent stops and turns - flexible, but speed depends on how fast you can navigate intersections). SSDs are the "sports car" that handles city driving far better than old HDDs ever could.

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