An example of Contemporary abstract A., question is "This software checks the validity of a Postal Service money order number. Use it to verify that 39539881642 is valid".
Software validation is known to be the method setting up documented evidence that shows that a computer system has been installed rightly.
Note that If input is“39539881642” one can say that the output have to be the same with the input.
Since the input number in the above question is 39539881642, therefore, we can say that money order number is valid.
In another scenario, when input is“39539881632” and when it has one digit to be incorrect, Then we can say that your input number will be 39539881632 and thus, the number is not valid as a result of the the error that was detected.
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