▸case-01 How do you configure a SOAP client endpoint in a legacy .NET Framework 4.8 application using the system.serviceModel section in web.config? | pass→pass | 11,846 | 12,283 | +4% | 1 | 1 | 0% | 2,423 | 2,808 | +16% | 0 | 0 | — |
▸case-02 How do you define a REST controller endpoint in a Java Spring Boot application using spring-boot-starter-web? | pass→pass | 8,829 | 10,597 | +20% | 1 | 1 | 0% | 1,934 | 1,915 | -1% | 0 | 0 | — |
▸case-03 How do you create an asynchronous REST GET endpoint in Python using FastAPI? | pass→pass | 10,268 | 10,838 | +6% | 1 | 1 | 0% | 1,661 | 2,059 | +24% | 0 | 0 | — |
▸case-04 We are building an ASP.NET Core web service with CQRS and want to dispatch commands and queries through an in-process mediator without manually writing custom mediator interfaces or service collection extensions. Which standard package and pattern should be used? | pass→pass | 8,018 | 8,638 | +8% | 1 | 1 | 0% | 1,591 | 1,704 | +7% | 0 | 0 | — |
▸case-05 In a Blazor Server application, developers are injecting a scoped database context directly into long-lived interactive components, causing concurrency exceptions and disposed object errors. What is the standard EF Core pattern to resolve this? | pass→pass | 10,413 | 11,973 | +15% | 1 | 1 | 0% | 2,013 | 1,996 | -1% | 0 | 0 | — |
▸case-06 A developer wrote 'public List<Product> GetActiveProducts() { return _context.Products.Where(p => p.IsActive).ToList(); }' in an ASP.NET Core API controller. We need to prevent thread pool starvation under high load. How should this query be updated? | pass→pass | 6,688 | 8,126 | +22% | 1 | 1 | 0% | 1,376 | 1,812 | +32% | 0 | 0 | — |
▸case-07 We are setting up command and query handlers in Program.cs for an ASP.NET Core .NET 8 app. A developer wrote explicit manual registrations for every single handler interface in ServiceCollection. How should all handlers in an assembly be registered concisely? | pass→pass | 11,977 | 8,313 | -31% | 1 | 1 | 0% | 1,924 | 1,953 | +2% | 0 | 0 | — |
▸case-08 We are creating a simple C# REST endpoint in ASP.NET Core .NET 8 to retrieve user profiles by ID. A developer wants to create a traditional ControllerBase class in a Controllers folder. What lightweight HTTP routing feature in ASP.NET Core should be used in Program.cs instead? | pass→pass | 3,837 | 4,184 | +9% | 1 | 1 | 0% | 760 | 817 | +8% | 0 | 0 | — |
▸case-09 An ASP.NET Core endpoint needs to stream 100,000 log records from EF Core to a client without loading all records into memory at once or returning a List<T>. What EF Core feature enables asynchronous streaming of query results? | pass→pass | 6,067 | 5,918 | -2% | 1 | 1 | 0% | 1,103 | 1,303 | +18% | 0 | 0 | — |
▸case-10 In a Blazor web application, a child component needs to notify its parent component when a button is clicked, passing a payload int newRating. A developer created a public Action<int> property on the child component. What standard Blazor component parameter type should be used instead to ensure proper UI re-rendering? | pass→pass | 6,964 | 3,989 | -43% | 1 | 1 | 0% | 789 | 886 | +12% | 0 | 0 | — |
▸case-11 We want to run validation rules automatically across all CQRS commands before they reach their handlers in an ASP.NET Core app, without adding validation calls inside every handler class. What MediatR pipeline interface enables cross-cutting concerns? | pass→pass | 4,557 | 6,112 | +34% | 1 | 1 | 0% | 865 | 1,107 | +28% | 0 | 0 | — |
▸case-12 In a .NET 8 service class, a developer wrote explicit private readonly fields and a constructor to receive dependency injection services. What C# 12 syntax simplifies parameter capture directly in the class declaration? | pass→pass | 4,623 | 5,106 | +10% | 1 | 1 | 0% | 760 | 909 | +20% | 0 | 0 | — |
▸case-13 An API endpoint fetches dashboard metrics from EF Core that are read-only and never saved back to the database. Currently, change tracking overhead is slowing down execution. Which LINQ extension method disables tracking for this query? | pass→pass | 2,953 | 3,384 | +15% | 1 | 1 | 0% | 495 | 655 | +32% | 0 | 0 | — |
▸case-14 We need to expose a /healthz endpoint in an ASP.NET Core .NET 8 service for container liveness probes. A developer is about to write a custom string-returning GET route. What built-in ASP.NET Core feature should be used to configure health endpoints? | pass→pass | 6,890 | 6,511 | -6% | 1 | 1 | 0% | 1,129 | 1,511 | +34% | 0 | 0 | — |
▸case-15 A developer logs user logins using string interpolation: _logger.LogInformation($"User {userId} logged in from {ipAddress}");. Why does this degrade structured logging, and how should the log message string be formatted? | pass→pass | 9,627 | 8,563 | -11% | 1 | 1 | 0% | 1,784 | 1,835 | +3% | 0 | 0 | — |
▸case-16 When an order is created, three independent internal services must be notified simultaneously. A developer injected all three services into CreateOrderCommandHandler. What MediatR messaging interface should be published to reach multiple handlers? | pass→pass | 3,703 | 5,943 | +60% | 1 | 1 | 0% | 738 | 1,319 | +79% | 0 | 0 | — |
▸case-17 In Entity Framework Core, we want to isolate entity property mappings and initial data seeding into separate configuration files instead of cluttering DbContext.OnModelCreating. Which interface should be implemented for each entity? | pass→pass | 4,525 | 4,095 | -10% | 1 | 1 | 0% | 902 | 1,022 | +13% | 0 | 0 | — |
▸case-18 In .NET 8 Blazor, a single component requires interactive WebAssembly execution on the browser client. Which Razor directive specifies this render mode at the top of the file? | pass→fail | 13,773 | 3,634 | -74% | 1 | 1 | 0% | 525 | 640 | +22% | 0 | 0 | — |
▸case-19 An ASP.NET Core API endpoint executes a long-running database query. If the client disconnects before completion, the server process continues executing. What parameter should be added to the controller or minimal API action to observe client cancellation? | pass→pass | 3,844 | 4,315 | +12% | 1 | 1 | 0% | 754 | 1,025 | +36% | 0 | 0 | — |
▸case-20 In Entity Framework Core, developers are manually appending .Where(x => !x.IsDeleted) to every LINQ query across dozens of repositories. How should this soft-delete filter be configured centrally in entity mapping? | pass→pass | 9,174 | 10,553 | +15% | 1 | 1 | 0% | 2,039 | 2,493 | +22% | 0 | 0 | — |
▸case-21 When defining data transfer objects and CQRS commands in C#, a developer uses mutable classes with public getters and setters. What C# syntax provides immutable reference types with value equality semantics and concise positional constructors? | pass→pass | 4,927 | 5,895 | +20% | 1 | 1 | 0% | 957 | 1,042 | +9% | 0 | 0 | — |
▸case-22 A developer is configuring dependency injection in ASP.NET Core for three services: a stateless calculation helper, an HTTP request context wrapper, and an in-memory configuration cache. What are the three standard service lifetime options provided by IServiceCollection? | pass→pass | 4,505 | 3,574 | -21% | 1 | 1 | 0% | 839 | 871 | +4% | 0 | 0 | — |
▸case-23 To handle concurrent updates on an EF Core entity without pessimistic database locking, what attribute or Fluent API configuration method designates a byte array property as an automatic database concurrency token? | pass→pass | 3,797 | 3,960 | +4% | 1 | 1 | 0% | 767 | 925 | +21% | 0 | 0 | — |