An example of input unit of computer system is

Appeared in: UPPSC 2022

Explanation

An input device is any hardware component that sends data to a computer, allowing a user to interact with and control it.
The Optical Mark Reader (OMR) is a scanner that captures data by detecting marks made on a specialized form.
Since the OMR's function is to feed data (the marks on the form) into the computer for processing (e.g., grading a test), it is classified as an input device.

Option B: A Visual Display Unit (VDU), or monitor, is an output device. Its function is to display information received from the computer, not to send information to it.
Option C: A plotter is a specialized type of printer, which is an output device. It receives data from the computer to create physical drawings or graphics.
Option D: A speaker is an output device. It receives audio signals from the computer and converts them into sound, presenting information to the user in an audible format.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Distinguishing between computer input and output devices as background academic context rather than a clinical decision trigger.
In modern healthcare, nurses constantly interact with computer systems. Understanding the difference between input and output devices is fundamental for effective use of Electronic Health Records (EHRs) and other clinical software.
Nurses use input devices like keyboards, mice, and barcode scanners to enter patient data, document care, and administer medications safely.
Output devices such as monitors (VDUs) are used to review patient charts, lab results, and physician orders, while printers are used for patient education materials and wristbands.

How to Approach the Question

First, identify the key term in the question: 'input unit'.
Define 'input unit' in the context of a computer system. An input device sends data to the computer for processing.
Evaluate each option against this definition.
Option A (OMR): Reads marks and sends the data to the computer. This is an input.
Option B (VDU/Monitor): Receives data from the computer to display. This is an output.
Option C (Plotter): Receives data from the computer to print. This is an output.

Concept Tested & Keywords

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E6 Textbook of Nursing Management and Leadership I. Clemen — Subpart C (pp 655-967 of 982) pp. 37-39, 36-38

E6 Essentials of Educational Technology Nursing EducationL Gopichandran C Kanniammal (pp 39-344 of 355) p. 209-211

Practise the full UPPSC 2022

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