Add CT3531 Database Systems II

third/semester1/CT3532: Database Systems II/exam_notes.txt

@@ -0,0 +1,51 @@
+- 4 questions, do 3
+- same type of questions as previous years
+- overlap in terms of style with exercise sheets
+- most questions have 3 parts with different marks
+
+- question 1 is on design (first topic covered)
+    a) functional dependencies minimal cover sets (problem based)
+    b) normalisation to BCNF (decursive/descriptive)
+    c) denormalisation (decursive/descriptive)
+    
+    - key things to know in general:
+        - functional dependency
+        - axioms to generate new functional dependencies 
+        - minimal cover sets
+        - normal forms
+            - redundancy / denormalisation
+
+- question 2: transactions
+    a) discuss one of problems (only 3 (think lost update problem etc not sure)) (supposedly easy)
+    b) concurrency control protocol to apply to above problem, such as timestamping, two phase locking etc.
+    c) distributed databases, how do we manage recovery or two phase locking or something
+
+    - problems that arise: concurrency control, lost update, etc
+    - serialisability, guarantee serialisability
+    - recovery, system log
+    - distributive databases
+
+- question 3: indexing
+    a) b trees
+    b) dynamic indexes
+    c) multiattribute indexes / joint attribute indexes
+
+    - B tree, B+ tree  (will be asked on b trees)
+    - hashing
+        - extendible / dynamic
+        - linear
+    - multi-attribute
+    - operators
+
+
+- question 4: database models
+    a) parallelism
+    b) deductive / logic databases (not covered on past papers) (not too hard because we didn't spend long on it)
+        - store facts and relations 
+    c) security (one of the models touched on 2023-11-14) (not covered on past papers)
+        - bell lepageol model or something of security
+
+- old course was called ct332
+    - will get deductive / logic databases on old papers
+
+- no more exam material after ./slides/DatabaseSecurity.pdf