An employee in the receiving department keyed in a shipment to the accounts payable system and inadvertently omitted the purchase order number. The best systems control to detect this error is:
Answer(s): A
A completeness test checks that all data elements are entered before processing. An interactive system can be programmed to notify the user to enter the number before accepting the receiving report.
A manufacturer is considering using bar code identification for recording information on parts used by the manufacturer. A reason to use bar codes rather than other means of identification is to ensure that:
Answer(s): B
Bar code scanning is a form of optical character recognition. Bar codes are a series of bars of different widths that represent critical information about the item. They can be read and the information can be instantly recorded using a scanner. Thus, bar coding records the movement of parts with minimal labor costs.
To avoid invalid data input, a bank added an extra number at the end of each account number and subjected the new number to an algorithm. This technique is known as:
Self-checking digits may be used to detect incorrect identification numbers. A check digit is an extra reference number that follows an identification code and bears a mathematical relationship to the other digits. The extra digit is input with the data. The identification code can be subjected to an algorithm and compared to the check digit.
What technique could be used to prevent the input of alphabetic characters into an all numeric identification number?
Answer(s): D
With a format check, the computer checks the characteristics of the character content length, or sign of the individual data fields. Field checks, sign checks, and range checks are examples of format checks.
Which of the following actions would best address a concern that data uploaded from a desktop computer may be erroneous?
Answer(s): C
The same edits and validation routines used for online data entry should be applied to data uploaded from a desktop computer. This could help prevent data errors.
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