Fichas
Topic 4: Validation and Verification
Fichas del conjunto (10)
- 1Inaccurate data causes...Incorrect decisions, poor business practice, loss of goodwill and trust.
- 2Types of errors that can occur during data entry with examplesTranscription - typing in wrong character by accident e.g. 2 instead of 7
Transposition- keying in, in wrong order e.g. 56789 instead of 57689
Transmission - file attachment can become corrupt when being sent by email, requires a parity check.
Input errors- impossible to eliminate but reduced by no human involvement e.g. bar code beep when scanned
Processing errors e.g. programming error gone undetected - 3Define VerificationThe process of checking that data has been copied correctly from one media to another. It matches the original source.
- 4Give 3 examples of verification checks with an example for eachVisual check- e.g. comparing what has been typed with original- school secretary checking letter against managers handwritten draft
Double entry- e.g. online banking form requires password to be entered twice OR 2 people enter same data so they should match
Sending back printouts- e.g. original goods bought online checked against confirmation email received - 5Define ValidationThe process of restricting data to make sure it is sensible and reasonable (might still be incorrect)
- 6Give an explanation and example for a length checkThe number of characters is what is expected
E.g. Postcode allowing up to 8 characters - 7Give an example for a range checkAdmission Number must be between 1 and 999999999
- 8Name 3 different checks and describe their purposeAny three from:
Type check- data is the expected type e.g. phone number
Range check- Data is between stated ranges
Format checks- Forces a particular format e.g. dates/postcode
Length check- Number of characters is what is expected
Presence checks- there must be at least one character present in a particular place
Fixed Value- A specific criteria is expected or selection from a list
Check digits- Number added to a length of numbers calculated from the other numbers - 9Give an example for a presence checkEmail address on online form looking for the @ placeholder
- 10Give an example for a format checkFor a date you could have it: 12/04/03 or 12.04.03 or 04/12/03
Información
- Descripción
- AS IT Fichas sobre Topic 4: Validation and Verification, creado por lauramyates3 el 18/04/2014.
- Creado por
- lauramyates3 · abr 2014
- Actualizado
- 19 feb 2016
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- 18
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