A dApp lets users mint NFTs. After a user clicks 'Mint', the transaction is submitted to the blockchain. The UI currently shows a spinner until the transaction is mined, which can take minutes. Users are abandoning the page because they think it is stuck. What should the developer implement to improve the experience?

Hide the spinner and show a blank screen until the transaction completes.

Automatically close the browser tab after the transaction is submitted.

Display a success message as soon as the user confirms the transaction in MetaMask.

Show a progress indicator with the transaction hash, a link to the block explorer, and a message that the transaction is pending.

Which of the following is an example of an accessibility feature that should be considered in a dApp interface?

Using small font sizes to fit more content on the screen.

Providing alternative text descriptions for images and icons.

Requiring users to hover over elements to see additional information.

Using bright, flashing colors to draw attention to important buttons.

A dApp team is building a responsive interface that must work on a wide range of devices, including older smartphones with small screens and high-end desktops. They also need to ensure the interface is accessible to users with low vision. Which approach best balances these requirements?

Create a separate mobile site with a simplified layout and a full-featured desktop site.

Design a mobile-first layout with fluid grids and scalable text, and test with a screen reader on both mobile and desktop.

Focus on desktop accessibility first, then add mobile support later.

Use a desktop-first design and rely on browser zoom to make it work on mobile.

A dApp team is adding a form for users to enter a recipient address. They want to ensure the form is accessible to users with visual impairments. Which practice is most important?

Add a tooltip that appears when the user hovers over the field.

Use a larger input field to make it easier to see.

Add a visible label associated with the input field using the 'for' attribute.

Use a placeholder text like 'Enter address' as the only label.

A dApp for a decentralized social network wants to attract users who are not familiar with blockchain. The team wants to simplify the onboarding process. Which approach best balances simplicity and user control?

Offer a 'social login' option that creates a non-custodial wallet in the background and lets users export the private key later.

Skip wallet creation and let users interact with the app without any authentication.

Use a custodial wallet where the dApp stores all private keys on its servers.

Require users to create a wallet and store their seed phrase before they can use the app.

EC-CouncilBlockchain Developer Certification

Domain 6Objective 5

Building User-Friendly dApp Interfaces BDC Practice Questions (Page 2)

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

52questions here

11free pages

7concepts

Questions 6–10

6application · medium
A dApp lets users mint NFTs. After a user clicks 'Mint', the transaction is submitted to the blockchain. The UI currently shows a spinner until the transaction is mined, which can take minutes. Users are abandoning the page because they think it is stuck. What should the developer implement to improve the experience?
Select an answer first
7foundation · easy
Which of the following is an example of an accessibility feature that should be considered in a dApp interface?
Select an answer first
8expert · hard
A dApp team is building a responsive interface that must work on a wide range of devices, including older smartphones with small screens and high-end desktops. They also need to ensure the interface is accessible to users with low vision. Which approach best balances these requirements?
Select an answer first
9application · medium
A dApp team is adding a form for users to enter a recipient address. They want to ensure the form is accessible to users with visual impairments. Which practice is most important?
Select an answer first
10application · medium
A dApp for a decentralized social network wants to attract users who are not familiar with blockchain. The team wants to simplify the onboarding process. Which approach best balances simplicity and user control?
Select an answer first

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