diff --git a/contents/algorithms/oop.md b/contents/algorithms/oop.md
index 8d33f7fd..b342b2ce 100644
--- a/contents/algorithms/oop.md
+++ b/contents/algorithms/oop.md
@@ -11,6 +11,7 @@ title: Object-Oriented Programming
 - Discuss algorithms and data structures for a garbage collector?
 - How would you implement an HR system to keep track of employee salaries and benefits?
 - How would you implement an Elevator system?
+- How would you implement a Parking Lot system?
 
 ## Courses