A dApp is being developed for a global audience. Some users access it on mobile browsers that do not have MetaMask installed. The team wants to ensure these users can still interact with the dApp. Which solution is most appropriate?

Tell users to switch to a desktop browser to use the dApp.

Build a custom in-app wallet that stores private keys on the server.

Require users to install the MetaMask extension on their mobile browser.

Integrate WalletConnect to allow users to connect via a mobile wallet app, and provide a fallback that opens the MetaMask mobile app if installed.

After conducting usability testing, what is the recommended next step in the iterative design process?

Analyze the feedback, make targeted improvements to the interface, and then test again.

Ignore the feedback if the users are not technical experts.

Immediately rewrite the entire dApp from scratch to fix all issues.

Deploy the dApp to production without changes to save time.

A dApp for a decentralized health records system must be accessible to users with low vision and motor impairments. The team is considering using a voice-controlled interface. Which approach best ensures accessibility for this user group?

Implement voice control as an optional input method alongside keyboard and touch, with visual and auditory feedback for all actions.

Replace all visual elements with voice-only interaction to simplify the interface.

Use voice control as the only input method, but provide a transcript of all interactions.

Add voice control but keep the existing mouse-only interface for other users.

A dApp team is implementing a transaction flow that requires the user to approve two transactions in sequence. The first transaction is a token approval, and the second is a swap. The team wants to minimize user confusion and errors. What is the best UX approach?

Show a clear step indicator that explains the two-step process, and disable the swap button until the approval is confirmed.

Automatically send the second transaction immediately after the first is signed, without waiting for confirmation.

Hide the approval step and only show the swap transaction to reduce complexity.

Ask the user to sign both transactions at the same time in a single MetaMask prompt.

A team is developing a DeFi dashboard that will be used by traders on desktop, tablet, and mobile. The UI currently has a fixed-width layout that requires horizontal scrolling on mobile. Which approach best ensures a seamless experience across devices?

Keep the fixed-width layout but add a horizontal scrollbar for mobile users.

Create a separate mobile app that replicates the desktop functionality with a different codebase.

Implement a responsive grid system that adapts the layout to different screen sizes, with touch-friendly buttons and readable font sizes.

Detect the device and redirect mobile users to a simplified read-only version of the dashboard.

EC-CouncilBlockchain Developer Certification

Domain 6Objective 5

Building User-Friendly dApp Interfaces BDC Practice Questions (Page 5)

Part of the Development Tools, Web3, and dApps domain, which makes up ~11% of our current practice bank.

52questions here

11free pages

7concepts

Questions 21–25

21application · medium
A dApp is being developed for a global audience. Some users access it on mobile browsers that do not have MetaMask installed. The team wants to ensure these users can still interact with the dApp. Which solution is most appropriate?
Select an answer first
22foundation · easy
After conducting usability testing, what is the recommended next step in the iterative design process?
Select an answer first
23expert · hard
A dApp for a decentralized health records system must be accessible to users with low vision and motor impairments. The team is considering using a voice-controlled interface. Which approach best ensures accessibility for this user group?
Select an answer first
24expert · hard
A dApp team is implementing a transaction flow that requires the user to approve two transactions in sequence. The first transaction is a token approval, and the second is a swap. The team wants to minimize user confusion and errors. What is the best UX approach?
Select an answer first
25application · medium
A team is developing a DeFi dashboard that will be used by traders on desktop, tablet, and mobile. The UI currently has a fixed-width layout that requires horizontal scrolling on mobile. Which approach best ensures a seamless experience across devices?
Select an answer first

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