Information Technology Reference
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2. A legacy system consists of a database and a set of data entry, update
and query applications. It is necessary to upgrade it without interrupting
operation, moving to a new system with an object-based design and a richer
set of applications. The applications require transactional operation. Outline
the steps that might be taken to perform this transition in a phased way.
3. Two organizations need to interoperate but have commitments to different
kinds of middleware and different data formats. Indicate an approach that
they might take to establish interoperability, stating what agreements would
need to be established initially and how support for necessary protocol and
format transformations might be provided. Illustrate how this process might
be assisted if each of the partners used import and export naming domains and
they established suitable interceptors to provide the translation of structured
documents.
4. Avoiding unnecessary detail, but stating clearly the objects, interfaces,
operations and actions involved, outline how a design might use the idea of a
suitable binding to describe each of the following cases. Your answer should
cover both the initialization and the use of the configuration.
(a) A computational design in which errors in a client-server interaction are
signalled to a separate management object.
(b) A computational design in which a video multicast from a camera to
a number of displays is configured dynamically to vary the number of
displays and the quality of service provided.
(c) A computational and an engineering design in which a video binding is
created between a source and a sink in domains using different frame
rates for representing video.
5. What is a conformance point? Explain the main roles and activities in the
ODP conformance model, and describe how they can be used in the following
example.
A new computer games console is designed to have open interfaces and
to accept games produced by a wide variety of vendors. The console can
be connected to the Internet, or can load games from standard prerecorded
cartridges. Internally, its system provides a rich set of high-level graphics
methods that the game modules can use.
Discuss, with the aid of a functional block diagram of the system, the
different classes of conformance point that are likely to be involved in the
testing of the console and of the games that vendors supply to run on it.
