Exam AZ-203 topic 6 question 6 discussion

Actual exam question from Microsoft's AZ-203

Question #: 6
Topic #: 6

A company is implementing a publish-subscribe (Pub/Sub) messaging component by using Azure Service Bus. You are developing the first subscription application.
In the Azure portal you see that messages are being sent to the subscription for each topic. You create and initialize a subscription client object by supplying the correct details, but the subscription application is still not consuming the messages.
You need to complete the source code of the subscription client
What should you do?

A. await subscriptionClient.CloseAsync();
B. await subscriptionClient.AddRuleAsync(new RuleDescription(RuleDescription.DefaultRuleName, new TrueFilter()));
C. subscriptionClient.RegisterMessageHandler(ProcessMessagesAsync, messageHandlerOptions);
D. subscriptionClient = new SubscriptionClient(ServiceBusConnectionString, TopicName, SubscriptionName);

Show Suggested Answer

Suggested Answer: C 🗳️
Using topic client, call RegisterMessageHandler which is used to receive messages continuously from the entity. It registers a message handler and begins a new thread to receive messages. This handler is waited on every time a new message is received by the receiver. subscriptionClient.RegisterMessageHandler(ReceiveMessagesAsync, messageHandlerOptions);
References:
https://www.c-sharpcorner.com/article/azure-service-bus-topic-and-subscription-pub-sub/

by user30 at April 30, 2020, 3:30 p.m.

Comments

Submit Cancel

user30

Highly Voted 5 years, 1 month ago

actually should be option A if its CompleteAsync() and not CloseAsync(), which removes method from the queue. The answer mentioned is correct...

upvoted 8 times

altafpatel1984

3 years, 6 months ago

Complete/Close cannot prevent receiving messages.

upvoted 1 times

...

rrongcheng

Highly Voted 4 years, 10 months ago

The given answer is correct: C - subscriptionClient.RegisterMessageHandler https://docs.microsoft.com/en-us/azure/service-bus-messaging/service-bus-dotnet-how-to-use-topics-subscriptions

upvoted 8 times

...

altafpatel1984

Most Recent 3 years, 6 months ago

For consuming messages, registermessagehandler is must. So Answer C is absolutely correct.

upvoted 1 times

...

user30

5 years, 1 month ago

should be option A

upvoted 1 times

altafpatel1984

3 years, 6 months ago

Complete/Close cannot prevent receiving messages.

upvoted 1 times

...