Software Architectures

How many architectural layers does a layered application usually have (amount of standard layers)?

• 3
• 4
• 5
• 6

Which architectural layers can be combined into one layer in small applications?

• Presentation & Business layers
• Business & Persistence layers
• Persistence & Database layers
• Business & Database layers
• Presentation & Persistence layers

What is the difference between an 'open' and a 'closed' architectural layer?

• Open layers can be modified, closed layers can not be modified.
• Open layers can interact with any other architectural layer, closed layers can only interact with the layer below.
• Open layers can be bypassed by the layer above, while closed layers can not be bypassed.
• Open layers are separate from the normal request flow, closed layers are always directly in this flow.

What is NOT a correct statement about the layered architecture?

• Each layer forms an abstraction and thus does not know the details about other layers.
• It has separation of concerns among components.
• It is standard practice to combine multiple layers.
• It has well-defined component interfaces.
• Each component has a limited scope.

Which sentence describes the event-driven architecture pattern best?

• The event-driven architecture pattern is a popular distributed asynchronous architecture pattern used to produce highly scalable applications.
• The event-driven architecture pattern is a natural pattern for implementing product-based applications.
• The event-driven architecture pattern does have an outstanding support for applications that are based on complex transactions (transactional units of work).
• The event-driven architecture pattern closely matches the traditional IT communication and organizational structures found in most companies.

Which are the four main types of architecture components in the mediator topology?

• Event queues, an event mediator, event channels, and event processors.
• Event queues, an event mediator, event clients, and event products.
• Event lines, an event negotiator, event channels, and event processors.
• Event queues, an event negotiator, event clients, and event processors.

What are the two types of events in the event-driven architecture mediator topology?

• Initial event and processing event.
• Initial event and channel event.
• Mediator event and processing event.
• Client event and queue event.

Broker topology is useful when:

• you have a relatively complex processing flow and you do not want (or need) central event orchestration
• you have a relatively simple event processing flow and you want (or need) central event orchestration
• you have a relatively complex event processing flow and you want (or need) central event orchestration
• you have a relatively simple event processing flow and you do not want (or need) central event orchestration

What is the component in the middle called?

• Event Queue
• Event Mediator
• Event Broker
• Event Channel

Which ratings fit to the event-driven architecure pattern?

• Agility: High, Testability: Low, Ease of Development: Low
• Agility: Low, Testability: High, Ease of Development: High
• Agility: Low, Testability: Low, Ease of Development: Low
• Agility: High Testability: High, Ease of Development: High
• Agility: Low, Testability: High, Ease of Development: Low