Question 3 Describe two phase locking and serializability (Why it is needed, what it is, how it works).

Question 4. Describe the ACID features/principles of a transaction. For each feature/principle, give an example that violates this feature. Namely, discuss a situation where a principle is violated and the corresponding problem(s). For example, what situation will cause a transaction not Atomic.

Note: the words that you use to answer these questions should be at least 1000 words (not including words in questions) in total. Show the word count for each answer. You must use YOUR OWN WORDS to answer questions and make your own examples, instead of simply copying words directly from the text as your answer.