Question 1

Do you know that it costs a lot of money to get a Certified Java Programmer certificate? It could cost you thousands of euros. Lets imagine we will develop a browser-based training system to help people prepare for such a certification exam. A user can request a quiz for the system. The system picks a set of questions from its database, and composes them together to make a quiz. It rates the users answers, and gives hints if the user requests it. Draw a use case diagram for this scenario.

Question 2

A company consists of departments. Departments are located in one or more offices. One office acts as headquarter. Each department has a manager who is recruited from the set of employees. Your task is to model the system for the company. Task: Draw a class diagram which consists of all the classes in your system, the attributes and operations, relations between the classes, multiplicity specifications, and other model elements that you find appropriate.

Question 3

A hotel room reservation management system. Draw a sequence diagram for the following scenario: when booking a room, members first log in to the system, query the room information and make a choice. Then fill in and submit the pre-order online. According to the reservation information, the system updates the member information, updates the room status to reserved, and prompts the member to book successfully.

Question 4

The automatic soft-drinks vending machine (SVM) is free and self checking every 10 minutes. After receiving the cash, the SVM waits for the user to select the desired drink. After the user makes a choice, the SVM checks whether the amount of cash entered by the customer is enough to buy the drink. If it is enough, the selected drink will be output; otherwise, it will wait for the user to continue to invest in cash. If the user does not make up the cash within one minute, the cash will be returned. During the purchase process, if the user presses the "Cancel" button, the cash will be returned. Task: draw a state chart diagram for the SVM.