Input Validation for ASP.NET Core CASENET Practice Questions (Page 8)

Questions 36–40

1. 36application · medium

   An ASP.NET Core MVC view uses the asp-validation-for tag helper to display validation messages. The developer notices that the error messages are not appearing when client-side validation fails. The server-side validation works correctly. What is the most likely cause?

   • AThe form is using the HTTP GET method.
   • BThe unobtrusive validation scripts are not loaded or are loaded in the wrong order.
   • CThe asp-validation-for tag helper is not compatible with client-side validation.
   • DThe model property does not have a data annotation attribute.
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2. 37application · medium

   A developer is creating a custom validation attribute for an ASP.NET Core MVC application. The attribute must check that a string property does not contain any HTML tags. The developer has derived from ValidationAttribute and overridden IsValid. What should the IsValid method return when the value is valid?

   • AValidationResult.Success
   • Btrue
   • CA new ValidationResult with an error message
   • Dnull
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4. 38foundation · easy

   What is the purpose of the 'jquery-validation-unobtrusive' script in ASP.NET Core?

   • AIt encrypts validation messages.
   • BIt replaces jQuery Validation entirely.
   • CIt converts data-* attributes into jQuery Validation rules.
   • DIt provides server-side validation logic.
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5. 39application · medium

   A developer is building an ASP.NET Core Web API and wants to return a custom error response when validation fails, instead of the default ValidationProblemDetails. The controller has the [ApiController] attribute. What should the developer do to customize the response?

   • ADisable automatic validation by removing [ApiController] or using [ApiController] with a custom filter that overrides the response.
   • BUse a custom validation attribute that returns a different error type.
   • CSet the Response property of the action to a custom object.
   • DOverride the OnActionExecuting method in the controller to change the response.
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6. 40foundation · easy

   Given the following model property, what validation rule does the attribute enforce? ```csharp [Range(1, 120)] public int Age { get; set; } ```

   • AAge must be exactly 1 or 120.
   • BAge must be greater than 120.
   • CAge must be between 1 and 120 inclusive.
   • DAge must be a positive integer only.
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