SWD8

When designing an entity class as a relational table, which of the following is NOT true?

• (a) The relational table has multiple primary keys.

• (b) The relational table has multiple foreign keys.

• (c) The relational table has a primary key.

• (d) The relational table has a concatenated primary key.

When mapping an aggregation hierarchy to a relational table, which of the following is NOT true?

• (a) The aggregate and part tables have different primary keys.

• (b) The aggregate and part tables have the same primary key.

• (c) The primary key of the aggregate table is a foreign key of the part table.

• (d) The primary key of the part table is a foreign key of the aggregate table.

When mapping a generalization/specialization relationship to a relational database, which of the following is NOT possible?

• (a) The superclass and each subclass are designed as relational tables.

• (b) Only subclasses are designed as relational tables.

• (c) The aggregate and part classes are designed as relational tables.

• (d) Only the superclass is designed as a relational table.

What is a service-oriented architecture (SOA)?

• (a) A distributed software architecture consisting of multiple related services

• (b) A distributed software architecture consisting of multiple autonomous
  services

• (c) A distributed client/service architecture

• (d) A distributed software architecture

Which of the following properties DOES NOT apply to a service?

• (a) Reusable

• (b) Discoverable

• (c) Fixed

• (d) Autonomous

In a SOA, which of the following is NOT true?

• (a) A client communicates with a specific service provided on a fixed server configuration.

• (b) A client discovers and links to a service.

• (c) Multiple clients communicate with a service.

• (d) Standard protocols are provided to allow clients to communicate with services

What is an object broker?

• (a) An object that breaks into a system

• (b) An object that sends requests to other objects

• (c) An object that handles requests sent by other objects

• (d) An object that mediates interactions between clients and services

Why does a service register with a broker?

• (a) So that service requesters can discover it

• (b) So that a service can interrogate the broker

• (c) So that the registry is up to date

• (d) So that the service can relocate

When is it particularly useful to use the Broker Handle pattern in place of the Broker Forwarding pattern?

• (a) If the client only communicates with the service once

• (b) If the client needs to have a dialog with the service

• (c) If the client knows the type of service required but not the specific service

• (d) If the client needs to provide the broker with a handle

Yellow pages brokering is useful when a service requester:

• (a) Needs to discover the location of the service

• (b) Knows the type of service required but not the specific service

• (c) Knows the specific service required but not the type of service

• (d) Needs to discover the broker