CAPTCHA is used for:

NORCET 10 Prelims-2026

Health Information and Technology (Basic Computer)

Easy

Appeared in: NORCET 10 Prelims-2026

Explanation

CAPTCHA stands for 'Completely Automated Public Turing test to tell Computers and Humans Apart.'.
Its primary function is to act as a security check to verify that a user is a human and not an automated program, also known as a bot.
This is achieved by presenting a challenge (like reading distorted text or identifying images) that is easy for humans but difficult for bots to solve.
By ensuring a human user, CAPTCHA helps prevent spam, automated attacks, and unauthorized access to websites and online services.

Option B: CAPTCHA is a security measure that adds an extra step for the user. This process can slightly slow down the user's interaction with a website, rather than making the browser faster.
Option C: Clearing the cache is a browser maintenance function performed by the user to delete temporary internet files. It is completely unrelated to the CAPTCHA verification process.
Option D: CAPTCHA is a small piece of code that runs on a webpage and has a negligible impact on data usage. It does not affect the overall speed or bandwidth of a user's internet connection.

Visual 1: Infographic: Showing different types of CAPTCHA tests, such as text-based, image selection (reCAPTCHA), and simple checkboxes. The infographic can explain how each type works to block bots.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Purpose of CAPTCHA as background academic context rather than a clinical decision trigger.
While not a clinical topic, understanding basic cybersecurity concepts like CAPTCHA is crucial for nurses and all healthcare professionals in the digital age.
Nurses regularly interact with secure systems like Electronic Health Records (EHRs), patient portals, and hospital intranets. These systems often use security measures like CAPTCHA to protect sensitive patient data from unauthorized access and automated attacks.
What if? If a nurse is unable to log in to an EHR system because they repeatedly fail a CAPTCHA, they might be temporarily locked out. The correct action is not to keep trying indefinitely but to wait a few minutes, ensure they are following the instructions correctly, or contact the IT helpdesk for assistance to regain access promptly.

How to Approach the Question

First, identify the keyword in the question, which is 'CAPTCHA'.
This is a factual recall question from the domain of computer and internet literacy.
Recall the definition or purpose of CAPTCHA. The name itself is an acronym: Completely Automated Public Turing test to tell Computers and Humans Apart.
Evaluate each option based on this definition. The primary goal is to differentiate humans from computers.
Option A directly matches this purpose. Options B, C, and D relate to performance and maintenance, which are unrelated to the security function of CAPTCHA.

Concept Tested & Keywords

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