Quiz # 2 Solutions
1. Software is to be developed to find the average marks of people in a class. The user interacts
with the software via a special panel that lets him enter the required information. Initially, the
software asks for number of students in the class by displaying a message on the panel
screen. Once this information is entered, the software displays a message to enter names of
students and marks. If negative marks or marks greater than 100 are entered, an error
message is displayed. If marks are correctly entered the software calculates the average
marks, stores them and also displays them on the screen.
Draw a Context Level DFD for the above said requirements.