41. Unit testing is

A. running the system with line data by the actual user
B. making sure that the new programs do in fact process certain transactions according to Specifications
C. is checking the logic of one or more programs in the candidate system
D. testing changes made in an existing or a new program
E. None of the above

42. A checksum digit is used for detecting Errors in

A. Data transmission
B. Arithmetic operations
C. Logical operations
D. All of the above
E. None of the above

43. Which of the following is used to derive the address, of a record from the record key

A. comma
B. hashing
C. variable
D. field
E. None of the above

44. The records in a file on magnetic tape

A. can only be accessed serially
B. are meant for backup
C. cannot be transformed to a disk file
D. have to be arranged in a key sequence
E. None of the above

45. Data structuring is refined through a process called

A. structuring process
B. hierarchical structure
C. normalization
D. Relation structure
E. None of the above