Tutorial / Structure charts

Question 1

Define the following terms for structure charts and give examples: module, sub-module, and flag.

Question 2

Use a table to compare DFDs and structure charts.

Question 3

Discuss the nested hierarchy of structure charts.

Questions 4-9 are based on the structure chart below for an email application.

Question 4

List the main modules and submodules shown in the structure chart of the email system.

Question 5

Describe the process sequence that occurs when a user logs into their email account and views their messages. Include any decision points involved.

Question 6

How does the verify login details module interact with the other components of the system?

Question 7

Explain the decision-making process represented by the diamond symbol. What choices are available, and how does the system proceed based on the decision made?

Question 8

Outline the sequence of events that occurs when a user sends a message. How do the 'compose email' and 'send email' modules interact, and what happens once the message is sent?

Question 9

How does the system handle login verification? Describe the interaction between the enter login details, verify login details, and authentication modules, including what happens if the login details are incorrect.