The purpose of validation is to

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BlackTom AI · Accepted Answer

The question asks about the purpose of validation in data handling or systems.
Option a: 'check that the output is as expected.' While validation can involve ensuring outputs meet expectations, validation is more about ensuring the inputs and data are correct and usable before processing, not only about outputs.
Option b: 'reduce the chance of incorrect data being input.' This correctly captures the core purpose of validation: to verify and enforce data quality, formats, ranges, and constraints so that only valid data enter the system, thereby preventing errors downstream.
Option c: 'add comments to an application to explain the code.' Code comments are for readability and maintenance, not for validating data; this is a documentation practice, not validation.
Option d: 'show the design of an application in English.' Communicating design is about documentation or specification, not about validating data inputs or their correctness.
In summary, the most accurate statement about validation’s purpose is that it helps reduce the chance of accepting bad data by checking and enforcing correct input during data capture and processing.

The purpose of validation is to

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