How many nibbles are in 128 bytes?

Appeared in: NORCET 5 Prelims - Sept 2023 (Shift-1)

Explanation

A byte is a fundamental unit of digital information that consists of 8 bits.
A nibble is a smaller unit, consisting of 4 bits.
Therefore, one byte contains exactly two nibbles (8 bits / 4 bits = 2).
To find the total number of nibbles in 128 bytes, you multiply 128 by the conversion factor of 2.
The calculation is: 128 bytes × 2 nibbles/byte = 256 nibbles.

Option A: This is the result of multiplying 128 by 8. This calculation correctly finds the total number of bits in 128 bytes, but the question asks for nibbles.
Option B: This is the result of multiplying 128 by 4. This might occur from confusing the bit-to-nibble ratio (4) with the nibble-to-byte ratio (2).
Option D: This is the result of dividing 128 by 2. This incorrectly reverses the conversion, dividing by the conversion factor instead of multiplying.

Visual 1: Infographic: A simple chart illustrating the hierarchy of digital data units: Bit -> Nibble (4 bits) -> Byte (8 bits / 2 nibbles) -> Kilobyte (1024 bytes).

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Data storage unit conversion (Bytes to Nibbles) as background academic context rather than a clinical decision trigger.
While not a direct clinical skill, basic computer literacy is essential for nurses using Electronic Health Records (EHRs), medical devices, and telehealth platforms.
Understanding data units is foundational knowledge for navigating the digital aspects of modern healthcare and ensuring accurate data handling.
What if the question asked for bits instead of nibbles? The calculation would be 128 bytes * 8 bits/byte = 1024 bits, making option A correct in that context.

How to Approach the Question

First, identify the two units in the question: 'nibbles' and 'bytes'.
Recall the relationship between these units. Remember that a 'byte' is the larger unit.
Establish the conversion factor: 1 byte = 8 bits, and 1 nibble = 4 bits. Therefore, 1 byte = 2 nibbles.
Apply the conversion factor to the given value: 128 bytes × 2 nibbles/byte.
Calculate the final answer (256) and match it to the correct option.

Concept Tested & Keywords

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Practise the full NORCET 5 Prelims - Sept 2023 (Shift-1)

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