A byte consists of?

Appeared in: PGIMS Rohtak NO - 2017

Explanation

A byte is a standard unit of digital information in computing and digital communications.
By definition, a byte consists of a sequence of eight bits.
This grouping of 8 bits allows for 256 (2^8) different possible values, which can be used to represent characters, numbers, or computer instructions.

Option A: A single bit is the smallest, most fundamental unit of data in computing, representing a binary 0 or 1. A byte is a collection of bits.
Option B: A group of four bits is known as a 'nibble'. It is exactly half of a byte.
Option D: A group of sixteen bits is equivalent to two bytes. In many computer systems, this is referred to as a 'word' or 'half-word', depending on the architecture.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Definition of a Byte in Computer Terminology as background academic context rather than a clinical decision trigger.
Understanding basic data units like bytes is fundamental in the age of digital health, as all electronic health records (EHRs), medical images (X-rays, CT scans), and lab reports are stored and transmitted as digital data.
The size of these files, measured in kilobytes (KB), megabytes (MB), or gigabytes (GB), impacts storage requirements on hospital servers and the speed of data transfer for telemedicine consultations.
What if? If a network's speed is measured in megabits per second (Mbps) and a patient's MRI file is 100 megabytes (MB), a nurse would need to understand the difference (1 byte = 8 bits) to estimate download times. A 100 MB file is 800 megabits, so on a 100 Mbps connection, it would take at least 8 seconds to download, not 1 second.

How to Approach the Question

This is a factual recall question from the subject of computer awareness.
Identify the key term in the question: 'byte'.
Recall the standard definition of this term in computing.
Evaluate the given options to find the one that matches the definition.
A byte is universally defined as consisting of 8 bits, which is a foundational concept in digital systems.

Concept Tested & Keywords

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Practise the full PGIMS Rohtak NO - 2017

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