Source documents generally help to improve accuracy in transaction processing
because
A) they specify which information to collect.
B) logically related data can be grouped in the same area of the document.
C) they provide directions and steps for completing the form.
D) All of the above are correct.
Which of the following statements is not true with regards to a correctly drawn
enterprise-wide REA diagram?
A) Every event must be linked to at least one resource.
B) Merging two transaction cycles on a common event may affect the minimum
cardinalities between the merged event and the other events.
C) Events can only be merged if they share the same resources and events.
D) Creating a set of tables from an REA diagram automatically results in a
well-structured relational database.
Encryption has a remarkably long and varied history. Spies have been using it to convey
secret messages ever since there were secret messages to convey. One powerful method
of encryption uses random digits. Two documents are prepared with the same random
sequence of numbers. The spy is sent out with one and the spy master retains the other.
The digits are used as follows. Suppose that the word to be encrypted is SPY and the
random digits are 352. Then S becomes V (three letters after S), P becomes U (five
letters after P), and Y becomes A (two letters after Y, restarting at A after Z). The spy
would encrypt a message and then destroy the document used to encrypt it. This is an