Building User-Friendly dApp Interfaces BDC Practice Questions (Page 7)

Questions 31–35

1. 31foundation · easy

   What is the purpose of WCAG (Web Content Accessibility Guidelines) in dApp development?

   • ATo define the visual design style for decentralized applications.
   • BTo provide a set of standards for making web content more accessible to people with disabilities.
   • CTo regulate the use of smart contracts in web applications.
   • DTo ensure that dApps are compatible with all blockchain networks.
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2. 32application · medium

   A dApp allows users to submit a transaction that may take several minutes to confirm. The team wants to keep the user informed without making them stare at a blank screen. What is the best UX pattern?

   • ADisplay a progress indicator with the transaction hash and a link to the block explorer, and allow the user to continue using the app.
   • BShow a modal that says 'Please wait' and prevent the user from closing it until the transaction is confirmed.
   • CAutomatically refresh the page every few seconds until the transaction is confirmed.
   • DShow a loading spinner and disable all buttons until the transaction is confirmed.
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4. 33expert · hard

   A dApp team is torn between two usability testing approaches: moderated testing with 5 target users, which provides deep qualitative insights but takes two weeks, and unmoderated remote testing with 20 users, which is faster but yields less detailed feedback. The team has a tight deadline to fix a critical onboarding issue. What is the best decision?

   • ASkip testing and rely on the team's experience to fix the onboarding issue.
   • BRun a quick unmoderated test with 5 users to identify the most obvious issues, then follow up with a moderated test if time permits.
   • CRun the moderated test with 5 users to get deep insights, even if it takes two weeks.
   • DRun the unmoderated test with 20 users to get statistically significant data quickly.
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5. 34application · medium

   A dApp team is implementing transaction feedback. They want to distinguish between a transaction that is pending, confirmed, and failed. What is the best way to present this to the user?

   • AUse color-coded badges: yellow for pending, green for confirmed, red for failed, with accompanying text.
   • BOnly show a notification when the transaction fails.
   • CUse a single status message that says 'Transaction submitted' for all states.
   • DShow a toast notification for pending and confirmed, but use a modal for failures.
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6. 35foundation · easy

   What is the recommended way to inform a user that a transaction has been successfully confirmed on the blockchain?

   • AAutomatically refresh the page and clear all form fields without any message.
   • BShow a success notification with a link to the transaction hash on a block explorer.
   • CDisplay a generic 'Operation completed' message without any details.
   • DLog the success to the browser console only, so the interface remains clean.
   Reveal Solution Discussion Select an answer first