Which of the following is a volatile memory?

Appeared in: UPPSC 2023

Explanation

RAM (Random Access Memory) is a type of volatile memory.
Volatile memory requires a continuous supply of power to retain data; its contents are erased when the device is powered off.
It serves as the computer's primary 'working' memory, providing high-speed access to data and applications currently in use by the CPU.
Because of its temporary nature, it is not suitable for long-term data storage.

Option A: ROM (Read-Only Memory) is a type of non-volatile memory. It stores firmware and essential startup instructions for the computer that must be preserved when the power is off.
Option B: A CD (Compact Disc) is a form of non-volatile optical storage. Data is physically 'burned' onto the disc's surface and remains permanently, regardless of power status.
Option C: A Pendrive, also known as a USB flash drive, uses flash memory, which is non-volatile. It is designed for portable, long-term storage and retains data without needing a power source.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Types of computer memory (Volatile vs. Non-Volatile) as background academic context rather than a clinical decision trigger.
In healthcare settings, understanding memory types is vital for data integrity. A patient's bedside monitor uses volatile RAM to display real-time vital signs, which are temporary and constantly updated.
Conversely, Electronic Health Record (EHR) systems store patient data on non-volatile storage (like servers or hard drives) to ensure a permanent, secure medical history is maintained even when devices are off.
What if? If a medical imaging device like an MRI machine used only volatile memory to store patient scans, a brief power outage would erase the images. This would necessitate repeating the scan, exposing the patient to unnecessary procedures and delaying diagnosis, highlighting the critical need for non-volatile storage for patient data.

How to Approach the Question

First, identify and define the key term in the question: 'volatile memory'.
Recall that 'volatile' means temporary and that the memory's contents are lost when power is removed.
Evaluate each option against this definition.
Consider ROM: It holds permanent startup instructions, so it is non-volatile.
Consider CD and Pendrive: These are used to store and transport files, which remain intact without power, so they are non-volatile.
Consider RAM: It is the computer's active workspace that clears when the computer is shut down. This matches the definition of volatile memory.

Concept Tested & Keywords

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E6 Essentials of Educational Technology Nursing EducationL Gopichandran C Kanniammal (pp 39-344 of 355) p. 201-203

Practise the full UPPSC 2023

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