rustanacexd

Practice Exam Attempt (3) Carefully taken with notes

Got an 16/20 on the latest practice exam. Missed questions 5, 7, 12, 13.

Summary of why missed each question:

5

always favor simpler method (cbt (cloud big query tool) vs hbase cli) … I feel uneasy with this answer

7

prefer simpler method. pub/sub more than capable. kafka is overkill. this question showed my lack of knowledge of pub/sub capabilities

rustanacexd

Webhooks vs Polling

What are webhooks, and why should you be using them? A webhook is a way to deliver real-time data to applications. Unlike traditional APIs where you need to poll for data frequently in order to get quasi real-time information, webhooks send data immediately.

You can think about webhooks like push notifications on your mobile phone. Rather than burning up the battery on your phone fetching information (polling) from applications to get updates, push notifications (webhooks) automatically send data based on event triggers. And just like push notifications, webhooks are less resource-intensive.

How Do Webhooks Work?

A webhook is an HTTP request (typically a POST sent to a pre-defined callback URI, where the server application is configured to handle the request on that URI. In many cases, webhooks are triggered by stimulus events, making them a faster and more efficient met