Unit 6: Advanced Features and Industry Practices - Practice Quiz

1 What is the main purpose of Parallel Routes in Next.js?

2 Which folder naming convention defines a Parallel Route slot in Next.js?

3 Where are named Parallel Route slots commonly received for rendering?

4 What is a common use of Proxy in a web application?

5 Which task is well suited to a request Proxy?

6 What do Intercepting Routes allow an application to do?

7 Which interface pattern commonly uses Intercepting Routes?

8 Where does Edge Runtime code typically execute?

9 What is a common benefit of using the Edge Runtime?

10 Which statement about the Edge Runtime is generally correct?

11 What does internationalization prepare an application to support?

12 What is a locale in an internationalized application?

13 Which content commonly changes according to a user's locale?

14 What is the main goal of a clear project architecture?

15 Where should shared utility functions generally be placed?

16 What is a reusable component?

17 Which practice improves component organization?

18 How should application secrets such as API keys usually be stored?

19 Why should an application validate user input?

20 What does a unit test usually verify?

21 In a dashboard application, which feature allows the layout to render a sidebar and a main content area independently using named slots?

22 A user navigates between pages inside a dashboard, but the analytics panel should preserve its state while the main content changes. Which approach is most appropriate?

23 What is the most suitable use of a Next.js proxy for a protected application area?

24 A proxy should run only for requests beginning with /admin. Which configuration principle should be applied?

25 A product list should open a product detail page in a modal when navigated from the list, but show a full page after a direct URL visit. Which feature supports this behavior?

26 Why should a modal opened through an intercepted route usually include a normal page implementation as well?

27 Which implementation is most compatible with an edge runtime?

28 An edge function must access a database driver that depends on Node.js TCP sockets. What is the main concern?

29 An application supports English and French URLs such as /en/products and /fr/products. What should determine the displayed language?

30 A price must display correctly for users in Germany and the United States. Which strategy is most reliable?

31 Which architectural choice best supports independent development of a large web application?

32 A team wants to prevent UI code from directly constructing database queries. Which architectural practice is most appropriate?

33 A button is reused across unrelated features and has no feature-specific behavior. Where should it generally be organized?

34 A page needs browser event handlers, but most of its content is static. How should the components be organized?

35 Which practice best protects a web application from SQL injection?

36 A server action receives an isAdmin value from a form. Why should the server avoid trusting that value?

37 Which cookie configuration is most appropriate for a session identifier that should not be accessible to JavaScript?

38 Which test type is most appropriate for verifying that a form displays an error when a required field is empty?

39 A test passes locally but fails intermittently in continuous integration because it depends on timing. What is the best improvement?

40 Which test provides the strongest check that a user can log in, reach a protected page, and log out through the browser?

41 A dashboard uses parallel routes for @analytics and @activity. The user navigates from /dashboard/reports to /dashboard/settings, but the activity panel should preserve its existing state while the analytics panel refreshes. Which design best achieves this behavior?

42 A modal is implemented with a parallel route slot. On a hard refresh at /inbox, the modal slot receives no active child, although client-side navigation correctly opens the modal. Which file most directly defines the refresh fallback for that slot?

43 Two parallel route slots display independent resources. One resource returns a 403 response while the other succeeds. What is the most appropriate boundary arrangement?

44 A proxy should protect /admin routes but must not run for /_next/static, image optimization requests, or files containing a dot in their final path segment. Which matcher strategy is most precise?

45 A proxy validates an access token and then redirects unauthenticated users to /login?returnTo=<original path>. Which issue must be addressed before deploying this implementation?

46 A product detail route should open as a modal when reached from a product list, but render as a full page after a direct URL entry or browser refresh. Which combination is required?

47 A modal opened through an intercepting route remains visible after the user presses the browser Back button. Which implementation detail is most likely missing?

48 An API handler works in Node.js but fails after being configured for the Edge Runtime because it imports a package that depends on fs and Node's TCP APIs. What is the correct diagnosis?

49 A globally distributed request handler performs a 700 ms database query against a single regional database. Moving the handler to the Edge Runtime does not improve median latency. Why?

50 An application supports locale-prefixed URLs and must preserve a user's requested path when redirecting / to a detected locale. Which behavior avoids a common routing defect?

51 A localized page is statically generated for en, fr, and de. A request arrives for fr-CA, which is configured as a fallback of fr. What is the most robust rendering strategy?

52 A team wants feature ownership to remain clear as a Next.js application grows. Which structure best supports localized changes and prevents unrelated domain code from accumulating in a global utilities folder?

53 A route group is introduced to give authenticated pages a shared layout without changing their public URLs. Which statement correctly describes the purpose of route groups?

54 A server component fetches private data and passes a callback that closes over a secret-bearing object to a client component. Why is this design invalid or unsafe?

55 A large interactive table causes an otherwise static page to become client-rendered. Which refactoring best preserves server rendering while retaining table interactivity?

56 A server action updates a user's email address. The form is rendered only for administrators, but a malicious client invokes the action directly. What control is essential inside the action?

57 An application accepts a next query parameter after login and performs redirect(next). Which validation is strongest for preventing an attacker-controlled external redirect?

58 A page displays user-submitted Markdown. The renderer permits raw HTML because some trusted authors need formatting. Which mitigation is required?

59 A component test passes because it mocks the router, but production fails when a parallel route slot is missing during a hard refresh. Which test addition most directly covers the defect?

60 A test verifies that an unauthorized user cannot access /admin. The implementation returns either a redirect or a 403 depending on whether the request is browser navigation or an API call. What assertion strategy is most resilient?