edg3/experiment_software_csharp_12_net_8 · Datasets at Hugging Face

title stringlengths 3 46	content stringlengths 0 1.6k
Answers:144	Write operations.
Answers:145	The main weaknesses of NoSQL databases are their consistency and transactions, while their main advantage is performance, especially when it comes to handling distributed writes.
Answers:146	Eventual, Consistency Prefix, Session, Bounded Staleness, and Strong.
Answers:147	No, they are not efficient in a distributed environment. GUID-based strings perform better, since their uniqueness is automatic and doesn’t require synchronization operations.
Answers:148	OwnsMany and OwnsOne.
Answers:149	Yes, they can. Once you use SelectMany, indices can be used to search for nested objects.
Answers:150
Answers:151	Chapter 13
Answers:152
Answers:153	With the help of database-dependent providers.
Answers:154	Either by calling them Id or by decorating them with the Key attribute. This can also be done with a fluent configuration approach.
Answers:155	With the MaxLength and MinLength attributes, or with their equivalent fluent configuration methods.
Answers:156	With something similar to builder.Entity<Package>().HasIndex(m => m.Name);.
Answers:157	With something similar to the following:
Answers:158	builder.Entity<Destination>()
Answers:159	.HasMany(m => m.Packages)
Answers:160	.WithOne(m => m.MyDestination)
Answers:161	.HasForeignKey(m => m.DestinationId)
Answers:162	.OnDelete(DeleteBehavior.Cascade);
Answers:163
Answers:164
Answers:165	With Add-Migration and Update-Database in the package-manager console, or with dotnet ef migrations add and dotnet ef database update in the operating system console.
Answers:166	No, but you can forcefully include them with the Include LINQ clause or by using the UseLazyLoadingProxies option when configuring your DbContext. With Include, related entities are loaded together with the main entities, while with UseLazyLoadingProxies, related entities are lazy-loaded; that is, they are loaded as soon as they are required.
Answers:167	Yes, it is, thanks to the Select LINQ clause.
Answers:168	By calling context.Database.Migrate().
Answers:169
Answers:170	Chapter 14
Answers:171
Answers:172	Because using queues are the only way to avoid time-consuming blocking calls.
Answers:173	With the import declaration.
Answers:174	With the standard Duration message.
Answers:175	Version compatibility and interoperability while maintaining good performance.
Answers:176	Better horizontal scalability, and support for the Publisher/Subscriber pattern.
Answers:177	For two reasons. The operation is very fast, and the insertion in the first queue of a communication path must necessarily be a blocking operation. At least one blocking operation is always necessary to store the message in some permanent storage (usually a queue), so it can be recovered if the ongoing processing might fail for some reason.
Answers:178	With the following XML code:
Answers:179	<ItemGroup>
Answers:180	<Protobuf Include=`Protosfile1.proto` GrpcServices=`Server/Client` />
Answers:181	<Protobuf Include=`Protosfile2.proto` GrpcServices=`Server/Client` />
Answers:182	...
Answers:183	</ItemGroup>
Answers:184
Answers:185
Answers:186
Answers:187	Where Protosfile1.proto and Protosfile2.proto must be replaced with the actual paths to the ProtoBuf files within our project. Moreover, the GrpcServices attribute must be set to `Server` or `Client`, depending on whether the proto file describes a server or not.
Answers:188
Answers:189	With channel.BasicPublish(…).
Answers:190	With channel.WaitForConfirmsOrDie(timeout).
Answers:191
Answers:192	Chapter 15
Answers:193
Answers:194	No, since this would violate the principle that a service reaction to a request must depend on the request itself, and not on other messages/requests that had previously been exchanged with the client.
Answers:195	No, implementing a service with a custom communication protocol is generally not good practice because it compromises interoperability, increases development and maintenance complexity, and isolates the service from widely used standards and tools. Standard protocols such as HTTP/REST, gRPC, and others are preferred for their broad support, ease of integration, and community backing.
Answers:196	Yes, it can. The primary action of a POST must be creation, but deletion can be performed as a side effect. The HTTP verb to use is determined by the virtual table named in the URL (in our case, a POST, since the operation is an addition), but other operations can be performed on other virtual tables that are not mentioned in the URL as side effects.
Answers:197	Three; they are Base64 encoding of the header, Base64 encoding of the body, and the signature.
Answers:198	From the request body.
Answers:199	The ApiController attribute sets up some default behaviors that help in the implementation of REST services.
Answers:200	The ProducesResponseType attribute.
Answers:201	When using API controllers, they are declared with the Route and Http<verb> attributes. When using a minimal API, they are declared in the first argument of MapGet, MapPost, … Map{Http verb}.
Answers:202	By adding something like builder.Services.AddHttpClient<MyProxy>() in the dependency injection part of the host configuration.
Answers:203
Answers:204	Chapter 16
Answers:205
Answers:206	Azure Functions is an Azure PaaS component that allows you to implement FaaS solutions.
Answers:207	You can program Azure Functions in different languages, such as C#, F#, PHP, Python, and Node.js. You can also create functions using the Azure portal and Visual Studio Code. Additional stacks can be used by using custom handlers: https://docs.microsoft.com/en-au/azure/azure-functions/functions-custom-handlers.
Answers:208	There are two plan options in Azure Functions. The first plan is the Consumption Plan, where you are charged according to the amount you use. The second plan is the App Service Plan, where you share your App Service resources with the function’s needs.
Answers:209	The process of deploying functions in Visual Studio is the same as in web app deployment.
Answers:210	There are lots of ways we can trigger Azure Functions, such as using Blob Storage, Cosmos DB, Event Grid, Event Hubs, HTTP, Microsoft Graph Events, Queue Storage, Service Bus, Timer, and Webhooks.
Answers:211	Azure Functions v1 needs the .NET Framework Engine, whereas v2 needs .NET Core 2.2, and v3 needs .NET Core 3.1 and .NET 5-6. v4 is the current version for .NET 6, 7, and 8.
Answers:212	The execution of every Azure function can be monitored by Application Insights. Here, you can check the time it took to process, resource usage, errors, and exceptions that happened in each function call.
Answers:213	They are functions that will let us write stateful workflows, managing the state behind the scenes.
Answers:214
Answers:215	Chapter 17
Answers:216
Answers:217	Typical middleware modules scaffolded by Visual Studio in an ASP.NET Core project include a developer exception page, request routing, static file serving, HTTPS redirection, authentication, and authorization.
Answers:218	No.
Answers:219	False. Several tag helpers can be invoked on the same tag.
Answers:220	ModelState.IsValid.
Answers:221	@RenderBody().
Answers:222	We can use @RenderSection(`Scripts`, required: false).
Answers:223	We can use return View(`viewname`, ViewModel).
Answers:224	Three providers are included in ASP.NET Core, but they must be configured. If different providers are needed, they must be implemented by the developers and added to the providers list.
Answers:225	No, ViewModels are not the only way for controllers to communicate with views in ASP.NET Core. Controllers can also use ViewData, ViewData, and TempData to pass data to views.
Answers:226
Answers:227	Chapter 18
Answers:228
Answers:229	API gateways work as interfaces for API microservices, while frontends take care of building web pages’ HTML.
Answers:230	Robust web servers optimize the whole request/response handling and ensure the needed level of security.
Answers:231	Because they have an impact on performance that is usually unacceptable for high-traffic microservices.
Answers:232	When transactions are quite fast and the probability of collision between transactions is low.
Answers:233	A better decoupling of the aggregates and commands methods.
Answers:234
Answers:235	Chapter 19
Answers:236
Answers:237	It is a W3C standard: the assembly of a virtual machine running in W3C-compliant browsers.
Answers:238	A web UI where dynamic HTML is created in the browser itself.
Answers:239	Selecting a page based on the current browser URL.
Answers:240	A Blazor component with routes attached to it. For this reason, the Blazor router can select it.
Answers:241	Defining the .NET namespace of a Blazor component class.
Answers:242	A local service that takes care of storing and handling all form-related information, such as validation errors and changes in HTML inputs.
Answers:243	Either OnInitialized or OnInitializedAsync.

Answers:144

Write operations.

Answers:145

The main weaknesses of NoSQL databases are their consistency and transactions, while their main advantage is performance, especially when it comes to handling distributed writes.

Answers:146

Eventual, Consistency Prefix, Session, Bounded Staleness, and Strong.

Answers:147

No, they are not efficient in a distributed environment. GUID-based strings perform better, since their uniqueness is automatic and doesn’t require synchronization operations.

Answers:148

OwnsMany and OwnsOne.

Answers:149

Yes, they can. Once you use SelectMany, indices can be used to search for nested objects.

Answers:150

Answers:151

Chapter 13

Answers:152

Answers:153

With the help of database-dependent providers.

Answers:154

Either by calling them Id or by decorating them with the Key attribute. This can also be done with a fluent configuration approach.

Answers:155

With the MaxLength and MinLength attributes, or with their equivalent fluent configuration methods.

Answers:156

With something similar to builder.Entity<Package>().HasIndex(m => m.Name);.

Answers:157

With something similar to the following:

Answers:158

builder.Entity<Destination>()

Answers:159

.HasMany(m => m.Packages)

Answers:160

.WithOne(m => m.MyDestination)

Answers:161

.HasForeignKey(m => m.DestinationId)

Answers:162

.OnDelete(DeleteBehavior.Cascade);

Answers:163

Answers:164

Answers:165

With Add-Migration and Update-Database in the package-manager console, or with dotnet ef migrations add and dotnet ef database update in the operating system console.

Answers:166

No, but you can forcefully include them with the Include LINQ clause or by using the UseLazyLoadingProxies option when configuring your DbContext. With Include, related entities are loaded together with the main entities, while with UseLazyLoadingProxies, related entities are lazy-loaded; that is, they are loaded as soon as they are required.

Answers:167

Yes, it is, thanks to the Select LINQ clause.

Answers:168

By calling context.Database.Migrate().

Answers:169

Answers:170

Chapter 14

Answers:171

Answers:172

Because using queues are the only way to avoid time-consuming blocking calls.

Answers:173

With the import declaration.

Answers:174

With the standard Duration message.

Answers:175

Version compatibility and interoperability while maintaining good performance.

Answers:176

Better horizontal scalability, and support for the Publisher/Subscriber pattern.

Answers:177

For two reasons. The operation is very fast, and the insertion in the first queue of a communication path must necessarily be a blocking operation. At least one blocking operation is always necessary to store the message in some permanent storage (usually a queue), so it can be recovered if the ongoing processing might fail for some reason.

Answers:178

With the following XML code:

Answers:179

Answers:180

Answers:181

Answers:182

...

Answers:183

</ItemGroup>

Answers:184

Answers:185

Answers:186

Answers:187

Where Protosfile1.proto and Protosfile2.proto must be replaced with the actual paths to the ProtoBuf files within our project. Moreover, the GrpcServices attribute must be set to `Server` or `Client`, depending on whether the proto file describes a server or not.

Answers:188

Answers:189

With channel.BasicPublish(…).

Answers:190

With channel.WaitForConfirmsOrDie(timeout).

Answers:191

Answers:192

Chapter 15

Answers:193

Answers:194

No, since this would violate the principle that a service reaction to a request must depend on the request itself, and not on other messages/requests that had previously been exchanged with the client.

Answers:195

No, implementing a service with a custom communication protocol is generally not good practice because it compromises interoperability, increases development and maintenance complexity, and isolates the service from widely used standards and tools. Standard protocols such as HTTP/REST, gRPC, and others are preferred for their broad support, ease of integration, and community backing.

Answers:196

Yes, it can. The primary action of a POST must be creation, but deletion can be performed as a side effect. The HTTP verb to use is determined by the virtual table named in the URL (in our case, a POST, since the operation is an addition), but other operations can be performed on other virtual tables that are not mentioned in the URL as side effects.

Answers:197

Three; they are Base64 encoding of the header, Base64 encoding of the body, and the signature.

Answers:198

From the request body.

Answers:199

The ApiController attribute sets up some default behaviors that help in the implementation of REST services.

Answers:200

The ProducesResponseType attribute.

Answers:201

When using API controllers, they are declared with the Route and Http<verb> attributes. When using a minimal API, they are declared in the first argument of MapGet, MapPost, … Map{Http verb}.

Answers:202

By adding something like builder.Services.AddHttpClient<MyProxy>() in the dependency injection part of the host configuration.

Answers:203

Answers:204

Chapter 16

Answers:205

Answers:206

Azure Functions is an Azure PaaS component that allows you to implement FaaS solutions.

Answers:207

You can program Azure Functions in different languages, such as C#, F#, PHP, Python, and Node.js. You can also create functions using the Azure portal and Visual Studio Code. Additional stacks can be used by using custom handlers: https://docs.microsoft.com/en-au/azure/azure-functions/functions-custom-handlers.

Answers:208

There are two plan options in Azure Functions. The first plan is the Consumption Plan, where you are charged according to the amount you use. The second plan is the App Service Plan, where you share your App Service resources with the function’s needs.

Answers:209

The process of deploying functions in Visual Studio is the same as in web app deployment.

Answers:210

There are lots of ways we can trigger Azure Functions, such as using Blob Storage, Cosmos DB, Event Grid, Event Hubs, HTTP, Microsoft Graph Events, Queue Storage, Service Bus, Timer, and Webhooks.

Answers:211

Azure Functions v1 needs the .NET Framework Engine, whereas v2 needs .NET Core 2.2, and v3 needs .NET Core 3.1 and .NET 5-6. v4 is the current version for .NET 6, 7, and 8.

Answers:212

The execution of every Azure function can be monitored by Application Insights. Here, you can check the time it took to process, resource usage, errors, and exceptions that happened in each function call.

Answers:213

They are functions that will let us write stateful workflows, managing the state behind the scenes.

Answers:214

Answers:215

Chapter 17

Answers:216

Answers:217

Typical middleware modules scaffolded by Visual Studio in an ASP.NET Core project include a developer exception page, request routing, static file serving, HTTPS redirection, authentication, and authorization.

Answers:218

No.

Answers:219

False. Several tag helpers can be invoked on the same tag.

Answers:220

ModelState.IsValid.

Answers:221

@RenderBody().

Answers:222

We can use @RenderSection(`Scripts`, required: false).

Answers:223

We can use return View(`viewname`, ViewModel).

Answers:224

Three providers are included in ASP.NET Core, but they must be configured. If different providers are needed, they must be implemented by the developers and added to the providers list.

Answers:225

No, ViewModels are not the only way for controllers to communicate with views in ASP.NET Core. Controllers can also use ViewData, ViewData, and TempData to pass data to views.

Answers:226

Answers:227

Chapter 18

Answers:228

Answers:229

API gateways work as interfaces for API microservices, while frontends take care of building web pages’ HTML.

Answers:230

Robust web servers optimize the whole request/response handling and ensure the needed level of security.

Answers:231

Because they have an impact on performance that is usually unacceptable for high-traffic microservices.

Answers:232

When transactions are quite fast and the probability of collision between transactions is low.

Answers:233

A better decoupling of the aggregates and commands methods.

Answers:234

Answers:235

Chapter 19

Answers:236

Answers:237

It is a W3C standard: the assembly of a virtual machine running in W3C-compliant browsers.

Answers:238

A web UI where dynamic HTML is created in the browser itself.

Answers:239

Selecting a page based on the current browser URL.

Answers:240

A Blazor component with routes attached to it. For this reason, the Blazor router can select it.

Answers:241

Defining the .NET namespace of a Blazor component class.

Answers:242

A local service that takes care of storing and handling all form-related information, such as validation errors and changes in HTML inputs.

Answers:243

Either OnInitialized or OnInitializedAsync.