diff --git a/exams/extras.md b/exams/extras.md
index e56a64f..1f3fac9 100644
--- a/exams/extras.md
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@@ -91,6 +91,10 @@ Explain the following terms used in agile development:
 
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+How can the **Black Sheep Effect** impact team behaviour?
+
+----
+
 What is "Docker"?
 
 Explain the purpose of the relationship between **Docker Engine**, **Docker Compose** and **Docker Machine**.
@@ -196,18 +200,6 @@ Define and explain three types of cloud services.
 
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-Explain how a server load balancer works
-
-Explain how a server cluster works
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-Explain, with the aid of a diagram, the principles behind server virtualisation.
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-List two benefits of employing virtualisation.
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-
 Continuous Integration and Continuous Deployment are often used by software development teams. For each of these:
 
 1. Explain the process