Which of the following is the smallest unit of storage?

Appeared in: NIA - 29 January 2023

Explanation

A Kilobyte (KB) is the smallest unit of data storage among the given options.
The hierarchy of data storage units, from smallest to largest, is Kilobyte (KB), Megabyte (MB), Gigabyte (GB), Terabyte (TB), and Petabyte (PB).
Each subsequent unit is 1024 times larger than the previous one (e.g., 1 GB = 1024 MB).

Option A: A Terabyte (TB) is a much larger unit than a Kilobyte (KB); 1 TB is equal to 1,024 GB or approximately one trillion bytes.
Option B: A Petabyte (PB) is the largest unit among the options, representing an extremely large amount of data (1,024 TB).
Option C: A Gigabyte (GB) is larger than a Kilobyte (KB) but smaller than a Terabyte (TB); 1 GB is equal to 1,024 MB.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Hierarchy of digital data storage units as background academic context rather than a clinical decision trigger.
In nursing informatics, understanding storage units is essential for managing Electronic Health Records (EHRs), where patient data, lab reports (KB), and medical images (MB/GB) have different storage requirements.
What if? If a nurse needs to transfer a patient's entire folder of high-resolution MRI scans to a specialist, knowing the total size is in Gigabytes (GB) helps determine the appropriate transfer method (e.g., a secure network portal instead of email, which has small attachment size limits).

How to Approach the Question

First, identify the core of the question: it asks to find the 'smallest' unit of storage.
Next, recall the definitions of the abbreviations: KB (Kilobyte), GB (Gigabyte), TB (Terabyte), and PB (Petabyte).
Organize these units in order from smallest to largest based on their relationship (each is roughly 1024 times the previous one).
The correct order is KB < GB < TB < PB.
Select the unit that comes first in this ordered list, which is KB.

Concept Tested & Keywords

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Practise the full NIA - 29 January 2023

Attempt every question from this paper in a timed mock, then review the full solution for each one.