User Interface Engineer 2 Interview Questions and Answers

Implement a loading strategy for an API call with a timeout and fallback content display.

• Use a loading state to indicate the API call is in progress.

• Set a timeout of 30 seconds to manage the loading UI.

• After 30 seconds, display the main content regardless of API success.

• Implement cancellation of the API call if it exceeds 30 seconds.

• Consider using a library like Axios that supports request cancellation.

Create a function that executes a callback function after 20 seconds without changing it within that time frame.

• Create a function that takes a callback function as an argument

• Use setTimeout to delay the execution of the callback function by 20 seconds

• Ensure that the callback function remains unchanged during the 20-second delay

Compose multiple functions from right to left

• Create a function that takes in an array of functions as arguments

• Use reduceRight method to compose the functions from right to left

• Return the composed function

A social media platform like WhatsApp for messaging and communication

• End-to-end encryption for secure messaging

• Ability to create groups for group chats

• Voice and video calling features

• Status updates for sharing updates with contacts

• Ability to share photos, videos, and documents

• Read receipts to see if messages have been read