Data Binding interview questions

15 real Data Binding questions from the Blazor 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 One-way binding?

Junior
  1. A.the modifier that controls which DOM event triggers the update of a two-way bound value, such as oninput versus onchange
  2. B.rendering a C# value into markup so the display updates when the value changes but user input does not flow back
  3. C.a type a child exposes so it can notify its parent of an event and trigger the parent to re-render
  4. D.the directive that synchronizes a form element's value with a C# field in both directions automatically
Reveal the answer + AI explanation — free account

2. Which term means: "rendering a C# value into markup so the display updates when the value changes but user input does not flow back"?

Junior
  1. A.bind:event
  2. B.One-way binding
  3. C.EventCallback
  4. D.Two-way binding (@bind)
Reveal the answer + AI explanation — free account

3. Which statement is correct?

Junior
  1. A.One-way binding — the modifier that controls which DOM event triggers the update of a two-way bound value, such as oninput versus onchange
  2. B.One-way binding — the directive that wires a DOM event such as a button press to a C# handler method
  3. C.One-way binding — the directive that synchronizes a form element's value with a C# field in both directions automatically
  4. D.One-way binding — rendering a C# value into markup so the display updates when the value changes but user input does not flow back
Reveal the answer + AI explanation — free account

4. What is Two-way binding (@bind)?

Junior
  1. A.the directive that wires a DOM event such as a button press to a C# handler method
  2. B.the modifier that controls which DOM event triggers the update of a two-way bound value, such as oninput versus onchange
  3. C.a type a child exposes so it can notify its parent of an event and trigger the parent to re-render
  4. D.the directive that synchronizes a form element's value with a C# field in both directions automatically
Reveal the answer + AI explanation — free account

5. Which term means: "the directive that synchronizes a form element's value with a C# field in both directions automatically"?

Junior
  1. A.Event binding (@onclick)
  2. B.EventCallback
  3. C.Two-way binding (@bind)
  4. D.bind:event
Reveal the answer + AI explanation — free account

6. Which statement is correct?

Junior
  1. A.Two-way binding (@bind) — the modifier that controls which DOM event triggers the update of a two-way bound value, such as oninput versus onchange
  2. B.Two-way binding (@bind) — rendering a C# value into markup so the display updates when the value changes but user input does not flow back
  3. C.Two-way binding (@bind) — a type a child exposes so it can notify its parent of an event and trigger the parent to re-render
  4. D.Two-way binding (@bind) — the directive that synchronizes a form element's value with a C# field in both directions automatically
Reveal the answer + AI explanation — free account

7. What is Event binding (@onclick)?

Junior
  1. A.the directive that wires a DOM event such as a button press to a C# handler method
  2. B.a type a child exposes so it can notify its parent of an event and trigger the parent to re-render
  3. C.rendering a C# value into markup so the display updates when the value changes but user input does not flow back
  4. D.the modifier that controls which DOM event triggers the update of a two-way bound value, such as oninput versus onchange
Reveal the answer + AI explanation — free account

9. Which statement is correct?

Junior
  1. A.Event binding (@onclick) — a type a child exposes so it can notify its parent of an event and trigger the parent to re-render
  2. B.Event binding (@onclick) — rendering a C# value into markup so the display updates when the value changes but user input does not flow back
  3. C.Event binding (@onclick) — the directive that wires a DOM event such as a button press to a C# handler method
  4. D.Event binding (@onclick) — the directive that synchronizes a form element's value with a C# field in both directions automatically
Reveal the answer + AI explanation — free account

10. What is EventCallback?

Mid
  1. A.the modifier that controls which DOM event triggers the update of a two-way bound value, such as oninput versus onchange
  2. B.a type a child exposes so it can notify its parent of an event and trigger the parent to re-render
  3. C.the directive that wires a DOM event such as a button press to a C# handler method
  4. D.the directive that synchronizes a form element's value with a C# field in both directions automatically
Reveal the answer + AI explanation — free account

12. Which statement is correct?

Mid
  1. A.EventCallback — rendering a C# value into markup so the display updates when the value changes but user input does not flow back
  2. B.EventCallback — the directive that wires a DOM event such as a button press to a C# handler method
  3. C.EventCallback — the directive that synchronizes a form element's value with a C# field in both directions automatically
  4. D.EventCallback — a type a child exposes so it can notify its parent of an event and trigger the parent to re-render
Reveal the answer + AI explanation — free account

13. What is bind:event?

Mid
  1. A.the directive that synchronizes a form element's value with a C# field in both directions automatically
  2. B.the modifier that controls which DOM event triggers the update of a two-way bound value, such as oninput versus onchange
  3. C.the directive that wires a DOM event such as a button press to a C# handler method
  4. D.rendering a C# value into markup so the display updates when the value changes but user input does not flow back
Reveal the answer + AI explanation — free account

14. Which term means: "the modifier that controls which DOM event triggers the update of a two-way bound value, such as oninput versus onchange"?

Mid
  1. A.Event binding (@onclick)
  2. B.bind:event
  3. C.EventCallback
  4. D.One-way binding
Reveal the answer + AI explanation — free account

15. Which statement is correct?

Mid
  1. A.bind:event — a type a child exposes so it can notify its parent of an event and trigger the parent to re-render
  2. B.bind:event — rendering a C# value into markup so the display updates when the value changes but user input does not flow back
  3. C.bind:event — the modifier that controls which DOM event triggers the update of a two-way bound value, such as oninput versus onchange
  4. D.bind:event — the directive that wires a DOM event such as a button press to a C# handler method
Reveal the answer + AI explanation — free account

Free to start

Answers, AI explanations, and a scored voice mock interview

Sign up free to check your answers with explanations, ask the AI tutor anything on any question, and take one full AI mock interview — scored like a real panel.

Practice Data Binding free