A banks automatic teller machine (ATM) issues cash automatically to its customers through currency-dispensing machines. Data communication networks and databases are used to interconnect ATM subsystems. The validity check is one of the most important ATM edit checks. Validity checks include:

Select one:

a. A numerical amount in a record that is not to exceed a predetermined amount.

b. Comparison of identification numbers or transaction codes with those known to be legitimate.

c. Check whether the characters in a field belong to the class it's supposed to contain.

d. The logical consistency of relationships between the values of the data items on an input record and those in the file.

(auditing subject)