diff --git a/practice-exam/practice-exam-11.md b/practice-exam/practice-exam-11.md
index 62aedbc..46a61e0 100644
--- a/practice-exam/practice-exam-11.md
+++ b/practice-exam/practice-exam-11.md
@@ -69,7 +69,7 @@ If this practice exam has been helpful to you please share it with others and re
 
     <details markdown=1><summary markdown="span">Answer</summary>
 
-    Correct Answer: C
+    Correct Answer: D
 
     Explanation: <https://d1.awsstatic.com/whitepapers/aws-security-whitepaper.pdf>
 
@@ -111,7 +111,7 @@ If this practice exam has been helpful to you please share it with others and re
 
     <details markdown=1><summary markdown="span">Answer</summary>
 
-    Correct Answer: A
+    Correct Answer: C
 
     Explanation: <https://docs.aws.amazon.com/IAM/latest/UserGuide/id_credentials_passwords_account-policy.html>
 
@@ -165,7 +165,7 @@ If this practice exam has been helpful to you please share it with others and re
 
     <details markdown=1><summary markdown="span">Answer</summary>
 
-    Correct Answer: D
+    Correct Answer: A
 
     Explanation: <https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/awsaccountbilling-aboutv2.pdf>
 
@@ -222,7 +222,7 @@ If this practice exam has been helpful to you please share it with others and re
 
     <details markdown=1><summary markdown="span">Answer</summary>
 
-    Correct Answer: AB
+    Correct Answer: AC
 
     Explanation: <https://aws.amazon.com/shield/>
 
@@ -320,7 +320,7 @@ If this practice exam has been helpful to you please share it with others and re
 
     <details markdown=1><summary markdown="span">Answer</summary>
 
-    Correct Answer: D
+    Correct Answer: B
 
     Explanation: <https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/UsingWithRDS.html>
 
@@ -449,7 +449,7 @@ If this practice exam has been helpful to you please share it with others and re
 
     Correct Answer: B
 
-    Explanation: <https://d36cz9buwru1tt.cloudfront.net/AWS_Building_Fault_Tolerant_Applications.pdf> (3)
+    Explanation: <https://d36cz9buwru1tt.cloudfront.net/AWS_Building_Fault_Tolerant_Applications.pdf>
 
     </details>
 
@@ -461,7 +461,7 @@ If this practice exam has been helpful to you please share it with others and re
 
     <details markdown=1><summary markdown="span">Answer</summary>
 
-    Correct Answer: D
+    Correct Answer: A
 
     Explanation: <https://aws.amazon.com/sns/faqs/>
 
@@ -590,7 +590,7 @@ If this practice exam has been helpful to you please share it with others and re
 
     <details markdown=1><summary markdown="span">Answer</summary>
 
-    Correct Answer: CE
+    Correct Answer: AC
 
     Explanation: <https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/consolidated-billing.html>