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Worksheets63.Create the Services Layer
Total questions: 38
Worksheet time: 19mins
Name
Class
Date
1.
What is the service layer in Java?
a)
The service layer consists of a collection of Java classes that implement business logic through high-level methods.
b)
The service layer is an additional layer in an ASP.NET MVC application that contains business logic and validation logic.
c)
The service layer is a conceptual layer within a network service provider architecture that serves third-party value-added services.
d)
The service layer provides logic to operate on the data sent to and from the DAO and the client.
2.
Why do we create a service layer?
a)
To implement business logic in an ASP.NET MVC application.
b)
To provide middleware for third-party value-added services.
c)
To mediate communication between a controller and repository layer and contain validation logic.
d)
To perform operations based on incoming requests from individual microservices.
3.
What is the service layer?
a)
The conceptual layer within a network service provider architecture.
b)
The layer that provides a set of operations/transactions for entities in microservices.
c)
The architectural pattern for organizing services into logical layers.
d)
The layer that facilitates communication between the controller and the persistence layer.
4.
What is the service layer and DAO layer?
a)
DAO is closer to the storage systems, while the service layer operates on data between the DAO and the client.
b)
The service layer is responsible for communication with the database, while the DAO layer contains business logic.
c)
The DAO layer provides a connection to the database, while the service layer operates on data between the DAO and the client.
d)
The service layer and DAO layer have the same functionality and purpose.
5.
What are the three as service layers?
a)
SaaS, PaaS, IaaS
b)
Presentation layer, Application layer, Data layer
c)
Data Link Layer, Network Layer, Transport Layer
d)
Controller layer, Service layer, Repository layer
6.
What is the Service Layer in Microservices?
a)
The layer that provides a set of operations/transactions for entities in microservices.
b)
The layer that performs operations based on incoming requests from individual microservices.
c)
The layer that communicates between the controller and the persistence layer in a microservices architecture.
d)
The layer that contains business logic and validation logic in a microservices architecture.
7.
Do I need a service layer?
a)
Yes, for all APIs, even simple CRUD operations.
b)
No, unless the API involves complex logic or calculations.
c)
Yes, to separate business logic from the repository layer.
d)
No, if the repository layer handles all the necessary operations.
8.
What is the service layer in Spring?
a)
The layer that facilitates communication between the controller and the persistence layer.
b)
The layer that contains validation logic in an ASP.NET MVC application.
c)
The layer that serves third-party value-added services in a network service provider architecture.
d)
The layer that communicates between the model state and the controller in Spring.
9.
What is the service layer structure?
a)
The architectural pattern for organizing services into logical layers.
b)
The layer that encapsulates the application's business logic and controls transactions.
c)
The layer that provides a set of available operations and coordinates the application's response.
d)
The layer that defines an application's boundary and available operations from the perspective of interfacing client layers.
10.
How does the service layer work?
a)
It defines the application's boundary and available operations.
b)
It encapsulates business logic and controls transactions.
c)
It communicates with the controller and persistence layer.
d)
It performs operations based on incoming requests from individual microservices.
11.
What is service layer code?
a)
An abstraction over domain logic that defines available operations.
b)
The layer that mediates communication between the controller and repository layer.
c)
The code that performs operations based on incoming requests.
d)
The code that contains business logic and validation logic.
12.
Is a service layer an API?
a)
Yes, it contains abstract and generic methods for communicating with the ECS.
b)
No, a service layer and an API are separate concepts.
c)
Yes, it communicates between the user interface and the ECS.
d)
No, an API is a broader category that includes web services.
13.
Why is the service layer an interface?
a)
It allows a class to become more formal about the behavior it promises to provide.
b)
It forms a contract between the class and the outside world, enforced by the compiler.
c)
It enforces the communication protocol between the service layer and other layers.
d)
It allows the service layer to communicate with different applications.
14.
What is the difference between an API and a service layer?
a)
An API is a broader category that includes all software components that act as intermediaries, while the service layer is specific to communication between layers in an application.
b)
An API is a type of service layer, and all service layers are APIs.
c)
An API is specific to web services, while a service layer is a general concept in software architecture.
d)
An API is responsible for communication with the database, while the service layer contains business logic.
15.
Is DAO the same as the service layer?
a)
Yes, they have the same functionality and purpose.
b)
No, the DAO layer provides a connection to the database, while the service layer operates on data between the DAO and the client.
c)
No, the DAO layer contains business logic, while the service layer handles data persistence.
d)
No, the DAO layer is specific to Java, while the service layer is a general concept in software architecture.
16.
What is a service layer in web development?
a)
It's an integration gateway that allows direct interaction with resources.
b)
It's responsible for processing data in the application tier.
c)
It's an abstraction between presentation and business logic that works like an API.
d)
It's a physical computing tier in three-tier architecture.
17.
What is a three-layer structure?
a)
It refers to the physical media of the network.
b)
It organizes applications into logical and physical computing tiers.
c)
It represents services such as identity management and communication services.
d)
It includes the databases for data storage.
18.
What is application and service layer?
a)
It represents the functionality for accessing the database.
b)
It includes the databases for data storage.
c)
It represents services such as identity management and communication services.
d)
It incorporates business logic and resources accessible through an interface.
19.
What is service layer testing?
a)
It is used to verify a certain business logic or a specific API call.
b)
It tests the physical media of the network.
c)
It tests the communication services in the application.
d)
It tests the functionality for accessing the database.
20.
What is a layer 1 service?
a)
It refers to the physical media of the network.
b)
It processes and transmits data across great distances.
c)
It handles logical data packets in the network.
d)
It is a software service that works at the application layer.
21.
Is a service layer mandatory in Spring Boot?
a)
Yes, it is a mandatory concept in Spring Boot applications.
b)
No, it is not specific to Spring Boot and can be skipped in simple applications.
c)
It depends on the complexity of the application's business logic.
d)
It is optional but recommended for better code organization.
22.
Why do we create a service in Spring Boot?
a)
To separate business logic from the controller class.
b)
To incorporate communication services in the application.
c)
To handle data transformations before sending a response.
d)
To access and manipulate data in the database.
23.
What should the service layer return?
a)
Domain model objects from the repository.
b)
DTO (Data Transfer Object) to the MVC controller.
c)
Raw data directly from the database.
d)
No specific return type is required.
24.
What is a service layer in Node.js?
a)
It handles the main logic of an app.
b)
It provides access to database functionalities.
c)
It is responsible for creating, updating, or deleting data.
d)
It is a layer that processes HTTP requests.
25.
How many layers are in Spring Boot?
a)
Three layers
b)
Four layers
c)
Five layers
d)
Six layers
26.
What is a service pattern?
a)
It refers to the basic building blocks of services, such as identity verification and payment processing.
b)
It is a design pattern specific to service-oriented architectures.
c)
It is a pattern for creating APIs in web development.
d)
It is a pattern for implementing business logic in the service layer.
27.
Which of the following is an example of a layer service?
a)
File transmission
b)
Remote login
c)
Mail service
d)
All of the above
28.
What are Layer 7 services?
a)
Services that handle logical data packets
b)
Services that provide application services based on level 7 protocols
c)
Services that process and transmit data across great distances
d)
Services that handle physical media of the network
29.
Who accesses the service layer?
a)
Web service interfaces
b)
Users working with the storefront
c)
Both a) and b)
d)
Only the controller
30.
Which service is an API?
a)
RESTful service
b)
Web service
c)
Microservice
d)
SOAP service
31.
What layer is REST API?
a)
Layer 3
b)
Layer 4
c)
Layer 5
d)
Layer 7
32.
Why create an interface for a service in Java?
a)
To enable polymorphism and use different implementations
b)
To improve performance and reduce memory consumption
c)
To enforce strict data typing in the service layer
d)
To restrict access to the service layer
33.
Why use a service interface in Java?
a)
To improve testability by creating mocks or test stubs
b)
To optimize the performance of service layer operations
c)
To enforce security protocols in the service layer
d)
To enhance code readability in the service layer
34.
What is the difference between an API and a service in Java?
a)
An API is used for communication between machines, while a service is used for communication between different applications.
b)
An API can compress data, while a service cannot compress data.
c)
An API provides a program with a description of how to interact with a system, while a service provides business logic.
d)
There is no difference between an API and a service in Java.
35.
How many layers are there in an API?
a)
One layer
b)
Two layers
c)
Three layers
d)
It depends on the specific API implementation
36.
What is a RESTful API vs a REST API?
a)
RESTful and REST are the same for APIs
b)
RESTful refers to adhering to REST constraints, while REST is the set of constraints
c)
RESTful APIs cannot be compressed, while REST APIs can be compressed
d)
RESTful APIs use SOAP protocol, while REST APIs use XML protocol
37.
Can you use @Service over a DAO?
a)
Yes, @Service and @Repository can be used interchangeably for DAO classes
b)
No, @Service should not be used for DAO classes
c)
It depends on the specific application flow
d)
@Service is only used for service layer classes, not DAO classes
38.
What is the use of the @Repository annotation?
a)
To indicate that the class provides storage and retrieval operations
b)
To enforce security measures on the class
c)
To optimize performance of database operations
d)
To restrict access to the class
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