Course content Course content
Modelling object-oriented software – an introduction
Modelling object-oriented software – an introduction

Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available.

Free course

Modelling object-oriented software – an introduction

4.2.1 System domain

The DVD Library holds DVDs of a number of films. It may have any number of copies of each film. The system should, for each film , hold the film's title; no two films have the same title.

A library member can borrow any DVD of a film that is not currently on loan. However, no member can have more than six DVDs on loan at once. A borrowed DVD must be returned within three days. When a library member returns a DVD it immediately becomes available for loan to other members.

Each DVD has a unique identifying number.

Each member of the library has a unique membership number; the system also holds each member's name.

M256_1
Print Print

Take your learning further

Making the decision to study can be a big step, which is why you'll want a trusted University. The Open University has 50 years’ experience delivering flexible learning and 170,000 students are studying with us right now. Take a look at all Open University courses.

If you are new to University-level study, we offer two introductory routes to our qualifications. You could either choose to start with an Access module, or a module which allows you to count your previous learning towards an Open University qualification. Read our guide on Where to take your learning next for more information.

Not ready for formal University study? Then browse over 1000 free courses on OpenLearn and sign up to our newsletter to hear about new free courses as they are released.

Every year, thousands of students decide to study with The Open University. With over 120 qualifications, we’ve got the right course for you.

Request an Open University prospectus371