16. A database management system might consist of application programs and a software package called

A. FORTRAN
B. AUTOFLOW
C. BPL
D. TOTAL
E. None of the above

17. An audit trail

A. is used to make back-up copies
B. is the recorded history of operations performed on a file
C. can be used to restore lost information
D. All of the above
E. None of the above

18. A race condition occurs when

A. Two concurrent activities interact to cause a processing error
B. two users of the DBMS are interacting with different files at the same time
C. both (a) and (b)
D. All of the above
E. None of the above

19. An indexing operation

A. sorts a file using a single key
B. sorts file using two keys
C. establishes an index for a file
D. both (b) and (c)
E. None of the above

20. The on-line, softcopy display a customer’s charge account to respond to an inquiry is an examples of a

A. forecasting report
B. exception report
C. regularly scheduled report
D. on demand report
E. None of the above