diff --git a/semester4/dmdb/data-modelling-databases-summary.pdf b/semester4/dmdb/data-modelling-databases-summary.pdf
index 9d84d46..d010977 100644
Binary files a/semester4/dmdb/data-modelling-databases-summary.pdf and b/semester4/dmdb/data-modelling-databases-summary.pdf differ
diff --git a/semester4/dmdb/parts/08_quick-overview/04_checklist.tex b/semester4/dmdb/parts/08_quick-overview/04_checklist.tex
index 6a4b781..0b2d47a 100644
--- a/semester4/dmdb/parts/08_quick-overview/04_checklist.tex
+++ b/semester4/dmdb/parts/08_quick-overview/04_checklist.tex
@@ -10,3 +10,6 @@ The following things are typically important to know very well (not exhaustive)
     \item Core concepts of Vector Search
     \item Recoverability (both the normal techniques, plus Snapshot Isolation and 2-Phase Locking (and strict variant thereof))
 \end{todolist}
+
+Note that since this course is taught (quite) poorly, there may be wrong questions or possibly even questions that are somewhat outside the scope of this course
+(as seen in some questions in the exercises)