Draw the context level and 1st level DFD 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 the context level and 1st level DFD 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.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Draw the context level and 1st level DFD
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.
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