Exam AZ-202 topic 5 question 4 discussion

HOTSPOT -
You are developing an SMS-based testing solution. The solution sends users a question by using SMS. Early responders may qualify for prizes.
Users must respond with an answer choice within 90 seconds. You must be able to track how long it takes each user to respond.
You create a durable Azure Function named SendSmsQuizQuestion that uses Twilio to send messages.
You need to write the code for MessageQuiz.
How should you complete the code? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Hot Area:

Suggested Answer:
Box 1: DateTime expiration = context.CurrentUtcDateTime.AddSeconds(90);
The user has 90 seconds to respond with the code they received in the SMS message.
Box 2:var timeoutTask = context.CreateTimer(expiration, cts.Token);
Create a timer.
Box 3: if(!timeoutTask.IsCompleted)
All pending timers must be complete or canceled before the function exits.
References:
https://github.com/Azure/azure-functions-durable-extension/blob/master/samples/precompiled/PhoneVerification.cs