Lifecycle interview questions

18 real Lifecycle 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 OnInitialized?

Junior
  1. A.the lifecycle method that runs after a component receives new values from its parent, before rendering
  2. B.the boolean argument that lets the after-render hook distinguish the very first paint from subsequent updates
  3. C.the lifecycle method that runs once when a component is first created, ideal for initial data setup
  4. D.the lifecycle method that runs after the component has been painted to the DOM, the safe place for JS interop
Reveal the answer + AI explanation — free account

3. Which statement is correct?

Junior
  1. A.OnInitialized — the lifecycle method that runs after a component receives new values from its parent, before rendering
  2. B.OnInitialized — the interface a component implements to release resources such as timers or subscriptions when it is destroyed
  3. C.OnInitialized — the lifecycle method that runs once when a component is first created, ideal for initial data setup
  4. D.OnInitialized — the lifecycle method that runs after the component has been painted to the DOM, the safe place for JS interop
Reveal the answer + AI explanation — free account

4. What is OnParametersSet?

Mid
  1. A.the lifecycle method that runs after a component receives new values from its parent, before rendering
  2. B.the overridable method returning a boolean that lets a component skip re-rendering to optimize performance
  3. C.the lifecycle method that runs once when a component is first created, ideal for initial data setup
  4. D.the boolean argument that lets the after-render hook distinguish the very first paint from subsequent updates
Reveal the answer + AI explanation — free account

6. Which statement is correct?

Mid
  1. A.OnParametersSet — the lifecycle method that runs after the component has been painted to the DOM, the safe place for JS interop
  2. B.OnParametersSet — the boolean argument that lets the after-render hook distinguish the very first paint from subsequent updates
  3. C.OnParametersSet — the lifecycle method that runs after a component receives new values from its parent, before rendering
  4. D.OnParametersSet — the lifecycle method that runs once when a component is first created, ideal for initial data setup
Reveal the answer + AI explanation — free account

7. What is OnAfterRender?

Mid
  1. A.the lifecycle method that runs after the component has been painted to the DOM, the safe place for JS interop
  2. B.the overridable method returning a boolean that lets a component skip re-rendering to optimize performance
  3. C.the lifecycle method that runs once when a component is first created, ideal for initial data setup
  4. D.the interface a component implements to release resources such as timers or subscriptions when it is destroyed
Reveal the answer + AI explanation — free account

8. Which term means: "the lifecycle method that runs after the component has been painted to the DOM, the safe place for JS interop"?

Mid
  1. A.OnParametersSet
  2. B.OnInitialized
  3. C.IDisposable in components
  4. D.OnAfterRender
Reveal the answer + AI explanation — free account

9. Which statement is correct?

Mid
  1. A.OnAfterRender — the lifecycle method that runs after the component has been painted to the DOM, the safe place for JS interop
  2. B.OnAfterRender — the interface a component implements to release resources such as timers or subscriptions when it is destroyed
  3. C.OnAfterRender — the overridable method returning a boolean that lets a component skip re-rendering to optimize performance
  4. D.OnAfterRender — the boolean argument that lets the after-render hook distinguish the very first paint from subsequent updates
Reveal the answer + AI explanation — free account

10. What is firstRender flag?

Mid
  1. A.the lifecycle method that runs after the component has been painted to the DOM, the safe place for JS interop
  2. B.the lifecycle method that runs after a component receives new values from its parent, before rendering
  3. C.the interface a component implements to release resources such as timers or subscriptions when it is destroyed
  4. D.the boolean argument that lets the after-render hook distinguish the very first paint from subsequent updates
Reveal the answer + AI explanation — free account

11. Which term means: "the boolean argument that lets the after-render hook distinguish the very first paint from subsequent updates"?

Mid
  1. A.OnAfterRender
  2. B.IDisposable in components
  3. C.ShouldRender
  4. D.firstRender flag
Reveal the answer + AI explanation — free account

12. Which statement is correct?

Mid
  1. A.firstRender flag — the interface a component implements to release resources such as timers or subscriptions when it is destroyed
  2. B.firstRender flag — the lifecycle method that runs after the component has been painted to the DOM, the safe place for JS interop
  3. C.firstRender flag — the boolean argument that lets the after-render hook distinguish the very first paint from subsequent updates
  4. D.firstRender flag — the overridable method returning a boolean that lets a component skip re-rendering to optimize performance
Reveal the answer + AI explanation — free account

13. What is ShouldRender?

Senior
  1. A.the boolean argument that lets the after-render hook distinguish the very first paint from subsequent updates
  2. B.the lifecycle method that runs once when a component is first created, ideal for initial data setup
  3. C.the lifecycle method that runs after a component receives new values from its parent, before rendering
  4. D.the overridable method returning a boolean that lets a component skip re-rendering to optimize performance
Reveal the answer + AI explanation — free account

14. Which term means: "the overridable method returning a boolean that lets a component skip re-rendering to optimize performance"?

Senior
  1. A.ShouldRender
  2. B.OnAfterRender
  3. C.IDisposable in components
  4. D.OnInitialized
Reveal the answer + AI explanation — free account

15. Which statement is correct?

Senior
  1. A.ShouldRender — the lifecycle method that runs after a component receives new values from its parent, before rendering
  2. B.ShouldRender — the overridable method returning a boolean that lets a component skip re-rendering to optimize performance
  3. C.ShouldRender — the interface a component implements to release resources such as timers or subscriptions when it is destroyed
  4. D.ShouldRender — the boolean argument that lets the after-render hook distinguish the very first paint from subsequent updates
Reveal the answer + AI explanation — free account

16. What is IDisposable in components?

Senior
  1. A.the lifecycle method that runs once when a component is first created, ideal for initial data setup
  2. B.the overridable method returning a boolean that lets a component skip re-rendering to optimize performance
  3. C.the interface a component implements to release resources such as timers or subscriptions when it is destroyed
  4. D.the lifecycle method that runs after the component has been painted to the DOM, the safe place for JS interop
Reveal the answer + AI explanation — free account

17. Which term means: "the interface a component implements to release resources such as timers or subscriptions when it is destroyed"?

Senior
  1. A.IDisposable in components
  2. B.OnInitialized
  3. C.OnAfterRender
  4. D.firstRender flag
Reveal the answer + AI explanation — free account

18. Which statement is correct?

Senior
  1. A.IDisposable in components — the boolean argument that lets the after-render hook distinguish the very first paint from subsequent updates
  2. B.IDisposable in components — the overridable method returning a boolean that lets a component skip re-rendering to optimize performance
  3. C.IDisposable in components — the lifecycle method that runs after a component receives new values from its parent, before rendering
  4. D.IDisposable in components — the interface a component implements to release resources such as timers or subscriptions when it is destroyed
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 Lifecycle free