Software Architecture and Design Practice Test 5

1. Which of the following is false for broker pattern?

A broker may sometimes be able to provide some services to clients more cheaply than if the clients interacted directly with the suppliers

Brokers always damage performance

None of the mentioned

Broker classes mediate communications between clients and suppliers, and in doing so they may slow this interaction, causing a performance penalty

2. What is a Reference denoted by?

A dot represents the null pointer

They to memory cells are represented by pointer arrows originating in the memory cell rectangles

They are represented by connecting disjoint collections of arrays or records with pointer arrows

They to memory cells are represented by pointer arrows originating in the memory cell rectangles & dot represents the null pointer

3. What is Class Invariant?

A class invariant is an assertion that must be true of any class instance between calls of its exported operations

All of the mentioned

Class invariants must be established by class constructors

Class invariants must be preserved by every exported operation in the class

4. What is Onion diagram illustrates?

It illustrates the connection between the layers in communications protocols, such as the International Standards Organization Open Systems Interconnection (ISO OSI) model,or the layers in user interface and windowing systems, such as the X Window System

All of the mentioned

It often illustrates operating system layers, with the kernel at the core

None of the mentioned

5. In particular, layers have which of the following characteristics?

All of the mentioned

Layers are by definition highly cohesive, thus satisfying the Principle of Cohesion

Layers doesn't support information hiding

Layers are constrained to use only above layers

6. Data structures generally employ which of the following implementation strategies?

None of the mentioned

All of the mentioned

Contiguous Implementation

Linked Implementation

7. What are stand-ins for objects not yet created are called?

virtual proxies

remote proxies

access proxies

none of the mentioned

8. Which of the pattern all the classes coupling is reduced?

Iterator

Mediator

Facade

Proxy

9. What should Designers ensure during Design finalization?

Design is Adequate

All of the mentioned

Design document does a good Job of documenting the design

None of the mentioned

10. What benefits does patterns provide?

None of the mentioned

Expert designers can benefit from studying patterns too: They can broaden their repertoire of patterns and deepen their understanding of the patterns they already know

Novice designers can benefit from learning solution patterns that experts use, without needing design experience

All of the mentioned