Offline Examination and Debugging of Messages

Correct Answer: C.

Option A is Incorrect.

Exactly once processing ensures that the Pub/Sub stream is processed exactly once.

Option B is Incorrect.

The seek and replay feature of Pub/Sub can reprocess messages by facilitating point-in-time rewind of backlog.

Option C is Correct.

It allows offline examination and debugging of messages to ensure no-delay processing of other messages.

Option D is Incorrect.

Filtering enables message filtering based on message attributes.

https://cloud.google.com/pubsub

The feature of Pub/Sub that allows offline examination and debugging of messages to ensure no-delay processing of other messages is "Seek and replay."

Pub/Sub is a messaging service provided by Google Cloud Platform (GCP) that enables asynchronous communication between applications. It allows for the decoupling of the sender and receiver of a message, so that they can operate independently of one another. The sender publishes messages to a topic, while the receiver subscribes to that topic and receives messages as they are published.

One important aspect of Pub/Sub is the ability to process messages in a timely manner. When a subscriber receives a message, it needs to be processed as quickly as possible to avoid any delay in the overall system. However, sometimes it may be necessary to examine and debug messages offline, without affecting the processing of other messages.

This is where the "Seek and replay" feature comes in. It allows subscribers to replay a message or a sequence of messages from a specific point in time, without affecting the processing of subsequent messages. This means that while the subscriber is examining and debugging a message, other messages are still being processed without delay.

The "Seek and replay" feature is particularly useful for troubleshooting and debugging purposes, as it enables subscribers to examine and analyze messages that may have caused errors or issues in the system. By replaying messages from a specific point in time, they can identify and fix any problems that may have occurred.

In summary, the feature of Pub/Sub that allows offline examination and debugging of messages to ensure no-delay processing of other messages is "Seek and replay." It enables subscribers to replay messages from a specific point in time without affecting the processing of subsequent messages, making it a powerful tool for troubleshooting and debugging purposes.