Designing services

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Which of the following best describes a service in the context of software?

Software that listens to requests and/or sends back responses (correct)
Software that interacts directly with the user
Software that is installed on a device
Software that performs automated tasks

Where does a service live when it listens to requests from applications on the client-side or from other services on the server-side?

Neither server-side nor client-side
Client-side
Server-side (correct)
Both server-side and client-side

Which of the following is an example of a client application?

Billing service
Music application (correct)
Song service
Playlist service

What is a sign of tightly coupled services?

Updating one service requires changing the logic in another service (D) Signup and view all the answers

What is the concept of high cohesion?

The logic, methods, and classes of a single service should be functionally related and support a single purpose (C) Signup and view all the answers

Which diagram type is used to illustrate the static parts of a system, such as classes, interfaces, and relationships?

Structural diagrams (A) Signup and view all the answers

What is the artifact commonly produced during database modeling to show the relationship behavior of data entities in a database?

Entity-Relationship diagrams (A) Signup and view all the answers

Which one of the following is not a benefit of writing service interfaces in a self-documenting style?

Reduced complexity of system design (A) Signup and view all the answers

What is one of the challenges of system design when thinking about how services communicate, cooperate, and scale together?

Determining the functionality of each service (A) Signup and view all the answers

Which of the following is a disadvantage of using microservices?

Increased complexity (D) Signup and view all the answers

What is the advantage of using microservices over monoliths in terms of scalability?

Microservices have better scalability (C) Signup and view all the answers

What is the tradeoff between reusability and development cost when using microservices?

Microservices allow for greater reusability but have higher initial development costs (B) Signup and view all the answers

What is the concept of loose coupling in microservices?

Services have minimal dependency on each other (A) Signup and view all the answers

Which of the following best describes a monolithic design?

A monolithic design refers to software that is built and deployed as a single unit. (C) Signup and view all the answers

Which of the following is an advantage of a monolithic design?

Easy development and fast deployment (D) Signup and view all the answers

Which of the following is a disadvantage of a monolithic design?

Low agility (B) Signup and view all the answers

Which of the following best describes microservices?

Microservices are a software design style that emphasizes modular component-based services. (A) Signup and view all the answers

According to the text, why is the proposed updateShippingAddress method an example of low cohesion?

Because it is not related to the cart functionality (D) Signup and view all the answers

Which of the following best describes the request-response model?

A model that describes how a client interacts with a server, where the client sends a request and the server responds with a corresponding response (A) Signup and view all the answers

Which of the following is true about service interfaces?

A service interface is the published interface used to invoke the service methods (B) Signup and view all the answers

What is a message data structure used for in a service interface?

To describe the request and response messages that a service uses to communicate over a network (B) Signup and view all the answers

What is the purpose of the 'repeated' keyword in a message data structure?

To create a list of values within the message (C) Signup and view all the answers