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16. 

Positive 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
17. 

Data Definition Language (DDL)
A. describes how data are structured in the data base
B. specifies for the DBMS what is required; the techniques used to process data
C. determine how data must be structured to produce the user's view
D. All of the above
18. 

In phase 1 of the system development life cycle, which of the following aspects are usually analyzed?
A. outputs
B. input (transactions)
C. controls
D. All of the above
E. None of the above
19. 

During the maintenance phase
A. System requirements are established
B. System analysis is carried out
C. Programs are tested
D. All of the above
E. None of the above
20. 

To run the old system and the new system at the same time for a specified period, the system implementation approach used is
A. pilot
B. phased
C. parallel
D. direct
E. None of the above