REQUIREMENTS ENGINEERING
REQUIREMENTS VALIDATION AND VERIFICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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To make sure the data entered is sensible.
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To make sure that only the correct options are selected.
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To make sure that all numbers are in correct length.
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To make sure that data is entered where required.
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Detailed explanation-1: -A presence check is used to make sure that a value has actually been entered in a field. In some database files entering data in certain fields can be optional. Other fields, such as key fields for example, are compulsory and must have values entered in them.
Detailed explanation-2: -Methods for data verification include double data entry, proofreading and automated verification of data. Proofreading data involves someone checking the data entered against the original document. This is also time consuming and costly.
Detailed explanation-3: -For example, a school will always want to know an emergency contact number, a video rental store might always want to know a customer’s address, a wedding dress shop might always want a record of the brides wedding date. A presence check makes sure that a critical field cannot be left blank, it must be filled in.