21. In Decision trees

A. nodes represent the conditions, with the right side of tree listing the actions to be taken
B. the root is drawn on the left and is the starting point on the decision sequence.
C. the branch depends on the condition and decisions to made
D. All of the above
E. None of the above

22. Which of the following is not a requirement of structured design?

A. It should use many GO TO statements
B. The code should be executed in a top-to-bottom fashion within each module
C. It should be made up of a hierarchy of modules
D. Each module should be as independent as possible of all other modules, except its parent
E. None of the above

23. The Data flow diagram (DFD) shows;

A. the flow of data
B. the processes
C. the areas where they are stored.
D. All of the above
E. None of the above

24. In data-flow diagrams, an originator or receiver of the data is usually designated by

A. a circle
B. an arrow
C. a square box
D. a rectangle

25. A data flow diagram is

A. the modern version of flowchart
B. mainly used at the systems specification stage.
C. the primary output of the systems design phase
D. All of the above
E. None of the above