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i m going to pay for air reservation online and i m paying
through credit card supose i give credit card no 123456.how
u chk this is valid or not.wat validation u put for kind of
fields
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Answer Posted / vikas pujar
There will be two level of verifications:
1. Front End - Where first we will check whether user has
entered valid card number or not. Normally in India Credit
Card is 16 digit Numeric. So front end need to check if
digit entered is 16 digit and its numeric only, if its not
throw error there only invalid number.
2. Back end - If number entered is 16 digits, we will be
verifying it against the database of bank. so if its correct
then continue with transaction or else throw error Credit
Card Number not found.
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