Question on N + 1 problem has more context

Author: Martini Arialdo

README.md

@@ -122,7 +122,7 @@ Sooner or later I will complete it with the relative answers. Feel free to contr
 * What's ACID (Atomicity, Consistency, Isolation, Durability)?
 * How would you manage database schema migrations?
 * How is Lazy Loading achieved? When is it useful? What are its pitfalls?
-* What's the N+1 problem?
+* The so called "N + 1 problem" is an issue that occurs when the code needs to load the children of a parent-child relationship with a ORMs that have lazy-loading enabled, and that therefore issue a query for the parent record, and then one query for each child record. How to fix it?
 * How would you find the most expensive queries in an application?
 * In your opinion, is it always needed to use database normalization? When is it advisable to use denormalized databases?
 * Of of the Continuous Integration's techniques is called Blue-Green Deployment: it consists in having two production environments, as identical as possible, and in performing the deployment in one of them while the other one is still operating, and than in safely switching the traffic to the second one after some convenient testing. This technique becomes more complicated when the deployment includes changes to the database structure or content. I'd like to discuss this topic with you.