Question
1: (10 points) Judge the correctness of the following r cach of he the following datements and choose·True, or , False. (1) For a given se · i ved by usit ng Arastrong's asioms der Corrctness: A True (h) Fabse. (2) lt is a simultaneously: (a) BCNF: (b) lossless joine) dependency preservation always possible to achieve the Gellowing three goals for a relational dalabase design Correctness: CA) True; (B) False. (3) In the ODMG object model, the exment of a class comlains all of ns transiemt objects Correctness: (A) Truc; (B) False. (4) Operation ,maaar in one ransaction is conflict to operaion "writr(B)" in another Correctness: (A) True: (B) False (S) Every serial schedule of transactions is a serializable schedule. Correctness: (A) True; (B) False. (0) A lossless-join decomposition ensures that no spurious tupies will be generated. Correctness: (A) True; (B) False. (7) The physical data independence ensures that no change for the database applications is required when the conceptual schema is changed. Correctness: (A) True; (B) False. (8) A database schema is not expected to change frequently, comparing to its corresponding database instance. Correctness: (A) True; (B) False (9) In the recovery procedure for the deferred-update technique, no undo operation is needed Correctness:) True: (B) False.
Explanation / Answer
true false true false true true true false false
