CSC 513
E-Commerce Technologies
H1
1/10/2007 (Write your name above)
Problem 1 2 3 4 5 Total
Points: 8 8 10 8 22 56
Score:
This homework assignment has 5 problems, for a total of 56 points.
1. (8 points) Of the following statements, identify all that hold about autonomy.
A. To get the components of an information system to correctly interoperate, we need to model the extent
of their autonomy
B. We try to avoid autonomy because systems with autonomous components are necessarily fragile
C. Autonomy arises because different components embody incompatible conceptual modeling assump-
tions
D. In large-scale information systems, autonomy often arises due to economic reasons
2. (8 points) Of the following statements, identify all that hold about Web technologies.
A. As the Web matures, we are able to accomplish more with static pages and thus can safely avoid dynamic
pages
B. Dynamic Web pages are produced with reference to a user request and backend processes or data
C. An advantage of JSP is that it helps separate the roles of user interface designers and application pro-
grammers
D. In typical e-commerce applications, a shopping cart maps to a stateless session bean
3. (10 points) Of the following statements, identify all that hold about architecture.
A. Protocols in the generic sense are off-the-shelf products
B. The important objective of enterprise architecture is to support business objectives in light of changing
needs
C. An IT architecture refers to the organization of IT resources in a business, and has little to do with the
organization of people in the business
D. An IT architecture should identify the dependencies and relationships among enterprise resources and
suborganizations
E. The best enterprise architectures couple the various components tightly so you know exactly what will
fit where, thus facilitating upgrading components as needed
4. (8 points) Of the following statements, identify all that hold about names, identifiers, and namespaces. (Recall
that a namespace is a set of symbols with some additional constraints.)
A. Two namespaces cannot include the same symbol
B. Two namespaces can include the same symbol, but this symbol refers to different names
C. Although it is allowed, it is not recommended for an XML document to refer to multiple namespaces
D. The main prerequisite for a unique identifier scheme is the existence of an architecture to resolve the
identifiers
5. (22 points) Of the following statements, identify all that hold about XML and XML Schema.
A. XML Schema is a language in which to specify the grammar of any XML document
B. XML Schema is the grammar of any XML document
C. XML Schema describes vocabularies built using XML
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