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Model Binding & Validation interview questions

15 real Model Binding & Validation questions from the ASP.NET Core bank, as asked in Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd — free to start.

1. What is Model binding?

Junior
  1. A.the dictionary capturing bound values and any validation errors, exposed via IsValid for checking
  2. B.the process of mapping data from a request's route, query string, form, or body onto handler parameters
  3. C.an attribute directing a parameter to be populated from the URL query-string values
  4. D.attributes such as Required and Range placed on properties to declare validation rules
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3. Which statement is correct?

Junior
  1. A.Model binding — an attribute directing a parameter to be deserialized from the request payload, typically JSON
  2. B.Model binding — the process of mapping data from a request's route, query string, form, or body onto handler parameters
  3. C.Model binding — attributes such as Required and Range placed on properties to declare validation rules
  4. D.Model binding — the dictionary capturing bound values and any validation errors, exposed via IsValid for checking
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4. What is Data annotations?

Junior
  1. A.the process of mapping data from a request's route, query string, form, or body onto handler parameters
  2. B.an attribute directing a parameter to be populated from the URL query-string values
  3. C.attributes such as Required and Range placed on properties to declare validation rules
  4. D.an attribute directing a parameter to be deserialized from the request payload, typically JSON
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6. Which statement is correct?

Junior
  1. A.Data annotations — an attribute directing a parameter to be deserialized from the request payload, typically JSON
  2. B.Data annotations — an attribute directing a parameter to be populated from the URL query-string values
  3. C.Data annotations — attributes such as Required and Range placed on properties to declare validation rules
  4. D.Data annotations — the process of mapping data from a request's route, query string, form, or body onto handler parameters
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7. What is [FromBody]?

Mid
  1. A.attributes such as Required and Range placed on properties to declare validation rules
  2. B.the dictionary capturing bound values and any validation errors, exposed via IsValid for checking
  3. C.an attribute directing a parameter to be deserialized from the request payload, typically JSON
  4. D.an attribute directing a parameter to be populated from the URL query-string values
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9. Which statement is correct?

Mid
  1. A.[FromBody] — an attribute directing a parameter to be deserialized from the request payload, typically JSON
  2. B.[FromBody] — the dictionary capturing bound values and any validation errors, exposed via IsValid for checking
  3. C.[FromBody] — an attribute directing a parameter to be populated from the URL query-string values
  4. D.[FromBody] — the process of mapping data from a request's route, query string, form, or body onto handler parameters
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10. What is [FromQuery]?

Mid
  1. A.the process of mapping data from a request's route, query string, form, or body onto handler parameters
  2. B.an attribute directing a parameter to be populated from the URL query-string values
  3. C.attributes such as Required and Range placed on properties to declare validation rules
  4. D.the dictionary capturing bound values and any validation errors, exposed via IsValid for checking
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12. Which statement is correct?

Mid
  1. A.[FromQuery] — attributes such as Required and Range placed on properties to declare validation rules
  2. B.[FromQuery] — the dictionary capturing bound values and any validation errors, exposed via IsValid for checking
  3. C.[FromQuery] — an attribute directing a parameter to be deserialized from the request payload, typically JSON
  4. D.[FromQuery] — an attribute directing a parameter to be populated from the URL query-string values
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13. What is ModelState?

Mid
  1. A.an attribute directing a parameter to be populated from the URL query-string values
  2. B.the dictionary capturing bound values and any validation errors, exposed via IsValid for checking
  3. C.attributes such as Required and Range placed on properties to declare validation rules
  4. D.an attribute directing a parameter to be deserialized from the request payload, typically JSON
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15. Which statement is correct?

Mid
  1. A.ModelState — an attribute directing a parameter to be populated from the URL query-string values
  2. B.ModelState — the dictionary capturing bound values and any validation errors, exposed via IsValid for checking
  3. C.ModelState — attributes such as Required and Range placed on properties to declare validation rules
  4. D.ModelState — the process of mapping data from a request's route, query string, form, or body onto handler parameters
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