Architecture

Question 1

The ISO/OSI networking model best resembles which architecture style?

Answer 1

Layered

Question 2

With a sophisticated enough protocol between client and server, a client server architecture becomes a 3-tiered architecture.

Answer 2

False,

The mechanism for communication between components isn’t considered a layer, tier or component. The assumption you can view the communication protocol as a layer is false.

Question 3

One program may be structured using two or more architecture styles. In other words, a single program isn’t confined to a single architecture style.

Answer 3

True

Question 4

Pipe components in the pipes and filter architecture style are one-way. Data is not allowed to flow both ways through a pipe component.

Answer 4

True

Question 5

What are the 4 main views in Philippe Kruchten’s 4+1 views of software architecture?

Answer 5

Logical, Process, Physical, Development

Question 6

Philippe Kruchten’s 4+1 View Model of Software Architecture

Answer 6

The model offers 5 different views that capture different architectural perspectives on any software system.

Question 7

Philippe Kruchten’s 4+1 view model of software architecture includes a view that expresses the desired look and feel of the proposed software system.

Answer 7

False, Philip Krutchen’s model does include a use case view, but use cases generally don’t include user interface details.

Question 8

Philippe Kruchten’s 4+1 : Logical View

Answer 8

This view ensures that the functional requirements are all met. It will contain class and object diagrams

Question 9

Philippe Kruchten’s 4+1 : Process View

Answer 9

This view shows the allocation of functionality to tasks and threads within tasks.

Question 10

Philippe Kruchten’s 4+1 : Physical View

Answer 10

This view shows the mapping of software elements to the actual machines where the software elements will run

Question 11

Philippe Kruchten’s 4+1 : Development View

Answer 11

This view is concerned with how the solution is packaged into modules or libraries and how the work is divided between developers

Question 12

The Android operating system has components called broadcast recievers. A broadcast receiver doesn’t have a user interface. A broadcast receiver is a unit of code that respond to specific system-wide events. For example, you might write a broadcast receiver that executes every time the device is connected to a power source. When the Android operating system detects that the phone has been connected to a power source, it will issue an event

Answer 12

Publish/Subscribe

The Publish/Subscribe pattern, also known as pub/sub, is an architectural design pattern that provides a framework for exchanging messages between publishers and subscribers. This pattern involves the publisher and the subscriber relying on a message broker that relays messages from the publisher to the subscribers.

Question 13

Can the organizational structure of a company effect the architecture of the software it produces?

Answer 13

Yes, this is Conway’s Law

Question 14

The publish/subscribe architecture style is most similar to which design pattern?

Answer 14

Observer

Question 15

Which scales better, the Client/Server or Peer-to-Peer architecture style? Here scale means adding more clients.

Answer 15

Peer-to-Peer scales better because clients both consume and provide resources. Clients in a Client/Server architecture only consume resources.

Question 16

Which of the following is likely to have the greatest influence on the selection of an architecture?

Answer 16

non-functional requirements

Question 17

The 3-tiered architecture style divides a system into three components: UI Business Logic Database. The Model-View-Controller architecture is a particular instance of the 3-tiered architecture style where View = UI, Controller = Business Logic and Model = Database.

Answer 17

False,

They are two different architecture styles. Argument #1: draw the diagrams. MVC looks more like a triad. 3-tiered is horizontal. Argument #2: with MVC the BL is in the model along with the data/state. With the 3-tiered architecture style, business logic is in the middle tier between the UI and database.

With MVC, business logic is in the model or fourth component and the control component has event handling routines.