Unit 1- Credit Card/UPC Code Validity

Front

What verifies an identification number has been entered correctly into a system?

Back

Check digit: A digit added to a number to ensure its validity and correctness.

Front

Calculate the check digit for the UPC Code: 7-22252-11004-?

Back

Check digit: 2. The check digit is calculated using a specific algorithm based on the preceding digits.

Front

How do you verify if the check digit for a credit card is correct?

Back

To verify, use the Luhn algorithm, which checks the validity of the credit card number.

Front

Is the UPC code 7-22252-11004-6 valid?

Back

Yes, it is valid. The check digit confirms the integrity of the UPC code.

Front

What is the check digit for the following credit card: 4551 6546 7890 468d?

Back

Check digit: 9. This is determined using the Luhn algorithm.

Front

Define UPC Code.

Back

Universal Product Code (UPC): A barcode symbology used for tracking trade items in stores.

Front

What is the purpose of a check digit?

Back

The purpose of a check digit is to detect errors in identification numbers.

Front

Explain the Luhn algorithm.

Back

The Luhn algorithm is a simple checksum formula used to validate various identification numbers, including credit card numbers.

Front

What is a credit card number composed of?

Back

A credit card number is composed of a series of digits that include the issuer identification number, account number, and check digit.

Front

How is the check digit calculated for a UPC code?

Back

The check digit is calculated by summing the digits in odd positions, multiplying by 3, adding the sum of the digits in even positions, and finding the modulo 10.