Question

Create a UML diagram describing a collection of classes for use in an automatic exam grading software.

• The software should be usable by teachers and students.
• Teachers should be able to write and administer exams with the software.
• All exam questions will be multiple choice, with one correct answer. Each question may be worth a different number of points.
• Teachers may add, remove, and edit questions until they publish the exam.
• Teachers must set a deadline for the exam before publishing.  Hint: use a time_t struct from <ctime> to represent the deadline.
• Once the teacher publishes the exam, students need to connect to the exam session using a special code (a string) they receive from their teacher.
• After connecting, students enter their name and U#, then answer all of the questions on the test, in order.
• Once the deadline for the exam has passed, the teacher can to generate a report with all of the students' name, U#, and grades. Also, students can no longer answer questions.

Your design does not need to include the following:

• How the exam codes are generated, nor how the program finds the exam associated with a specific code
• User interface elements for the program; e.g., a login screen for students and teachers, menus to perform actions, etc.
• Login information for students or teachers
• How students are connecting to the exams; e.g., a website, network connection, etc.

Answer 1

As given in he problem the possible  of objects are

1)Teacher

2)Student

3)Exam

4)Question

so there is a requirement of four classes

1)Teacher

2)Student

3)Exam

4)Question

Assumption:- An Exam contains 50 questions.

So, there is a relation ship between exam and question

an exam is composed of 50 question.

exam is a aggregation of questions

one or more students can appear in one exam

exam is aggregation of students