Consider the following schedule of transactions W1(A) W2(A) W1(A) W2(A) W1(A) Which of the following properties are true for the above schedule and justify the reason for your answer with explanation? a) Conflict Serializable b) View Serializable c) Recoverable

Q: Explain why the following technique for transaction execution may providebetter performance than…

A: Consider the modified two-phase locking (2PL) transaction execution technique.

Q: R (x, y, z, m) Consider the following functional dependencies for a relation x -> (y, z, m), (x, m)…

A: Answer: {x}, {x,m} option 1 is correct.

Q: 1. CHAPTER TRANSACTION MANAGEMENT Suppose the following two transactions in Table 1.0 are executed…

A: Concurrency Control is the working concept that is required for controlling and managing the…

Q: Using the transaction log you created in Step 1 above, trace its use in a database recovery. Do this…

A: So, we need to use the hierarchy query to traverse back the tree structure. Here, the number of…

Q: sing the transaction above as an example, explain the concepts of Atomicity and Isolation.

A: A database is a coordinated assortment of organized data, or information, regularly put away…

Q: show that the two-phase locking ensures conflict serializability and that transactions can be…

A: Given: Demonstrate that two-phase locking guarantees conflict serializability and that transactions…

Q: Re-arrange operations of the transaction given in schedule in such a way that deadlock must not…

A: Q

Q: 5.Provide an example of at least one application (if there are any such applications) where: (a)…

A: Given: To provide an example of at least one application (if there are any such applications) where:…

Q: The follow questions refer to the transaction schedule below, that records bookings of tickets for a…

A: The, given information is: TIME ID TRANSACTION ID OPERATION 1 A Read Tickets left =…

Q: Consider the following two transactions:T34: read(A);read(B);if A = 0 then B := B + 1;write(B).T35:…

A: The Lock and unlock instructions: T31: lock-S(A)read(A)lock-X(B)read(B)if A = 0then B := B +…

Q: Assume that two concurrent executing transactions T₁ and T₂ are allowed to update same stock item…

A:

Q: (Transaction Management) Make a solution to handle two transactions where the initial BalanceX is…

A:

Q: a) Indexes are data structures that allow finding record ids of records with given values in index…

A: SUMMARY: - hence we discussed all the points.

Q: Which of the following is a property of transactions? a. Atomicity b. Durability c. Isolation d. All…

A: transaction have ACID  properties means  atomicity  consistency isolation durability

Q: Given the following transaction dataset: Tid Items 10 А, С, D 20 В, С, D 30 А, В, С, D 40 В, D 50 А,…

A: Here given the transactions containing transaction id and items with minimum support i.e.,…

Q: The database contains the following data items and their values: A = 1000 B = 1500 C = 3000 Log…

A: Database Recovery A major responsibility of the database administrator is to prepare for the…

Q: ls of lock granularity ava

A: Mention the many levels of lock granularity available in a database.

Q: The following table presents the lock requests by transactions T1, T2, T3, and T4. S(.) and X(.)…

A: Lets start with  X(B)  to T1  ->granted X(A) to T4   -> granted S(C) to T3   -> granted But…

Q: Provide an example of at least one application (if there are any such applications) where: (a) data…

A: Note: There are multiple questions are given in one question. According to the rule, you will get…

Q: Is the schedule S1 cascadeless and recoverable? Justify your answer. Draw the precedence graph of…

A: The schedule S1 consists of three transactions T1, T2, T3 as the cascadeless and recoverable,the…

Q: Consider the schedule S1 = w1(A), r2(A), w1(B), w3(C), r2(C), r4(B), w2(D), w4(E), r5(D), w5(E) on…

A: If there are T1, T2..............Tn n transactions and N1, N2, N3,......Nn number of operations…

Q: Consider a table Products(name, price). There are two tuples in Products: ('OK',2000) and…

A: ANSWER:-   UPDATE TEST SET Y := (Y + 10) WHERE AID = 1; UPDATE TEST SET X := (X - 10) WHERE AID = 1;…

Q: Consider the following schedule of transactions W1(A) W2(A) W1(A) W2(A) W1(A) Which of the following…

A: The given transactions W_1(A)W_2(A)W_1(A)W_2(A)W_1(A)W1​(A)W2​(A)W1​(A)W2​(A)W1​(A) The following…

Q: . _______ means that data used during the execution of a transaction cannot be used by a second…

A: Isolation means that data used during the execution of a transaction can't be used by a second…

Q: A transaction may not always complete its execution successfully. Such a transaction is termed a.…

A: Exрlаnаtiоn:  If  we  аre  tо  ensure  the  аtоmiсity  рrорerty,  аn  аbоrted  trаnsасtiоn  must…

Q: 5. Consider the following table Xbox_Games(name, price) and assume that these values already exist…

A: A transaction is basically an action or series of action which leads to any update or reading the…

Q: shown below and minimum_support = 30%. Using A-priori

A:

Q: Consider the following two transactions: T1: R(x),R(Y),Y=Y+2,W(Y) T2:R(Y),R(X),X=X+10,W(X)…

A: Answer :

Q: Subject code - rcs502  Consider 3 transactions T₁, T₂ and T3 having 2, 3 and 4 operations…

A: Solution -  Since we already know that  If T1 ,T2 , T3 are the transaction with p,q,r operations…

Q: {T1,T2,T3} ->  Transactions {A,B,C,D,E,F,G} -> Database objects L(x) -> X locking X object. U(x)…

A: Given tables describes a Schedule which consists of three transactions T1, T2 and T3. The database…

Q: Suppose that each of the following Update operations is applied directly to the database state shown…

A: Actually, Database is a used to stores the data/information.

Q: Which itemsets (of any length) are frequent if you know that {ace} and {ad} are the only maximal…

A: ANSWER: Maximal Frequent Itemsets: The quantity of frequent itemsets produced by the Apriori…

Q: Consider the following lock requests as given below. S1(A),S2(B),X3(A),X2(C),S1(B),S1(C),X2(B)…

A: Given lock requests are: S1(A), S2(B), X3(A), X2(C), S1(C), X2(B) S() represents shared lock and…

Q: Consider the following two transactions: T1: R(x),R(Y),Y=Y+2,W(Y) T2:R(Y),R(X),X=X+10,W(X) A)…

A: A transaction is said to follow the Two-Phase Locking protocol if Locking and Unlocking can be done…

Q: Consider a failure that occurs during 2PC for a transaction. For each possible failure that you…

A: Explanation of two PCs that ensures atomicity despite of failure: Consider two PCs for which a…

Q: Consider the following schedule of transactions W1(A) W2(A) W1(A) W2(A) W1(A) Which of the following…

A: Given schedule of transactions, W1(A) W2(A) W1(A) W2(A)  W1(A),  It contains two transactions. T1…

Q: R (X, y, Z, m) Consider the following functional dependencies for a relation x -> (y, z, m), (x, m)…

A: The answer is x X generate all attributes. candidate key: A set of minimal attributes that can…

Q: A transaction database contains ten transactions shown below and minimum_support = 30%. Using…

A: Given :-  Minimum support =30%   =  30100*10  (No of transaction) = 3.

Q: Discuss as cenario where deadlock is occurred while executing transaction. Suppose you have two…

A: Given : Discuss a scenario where a deadlock has occurred while executing a transaction. Suppose you…

Q: istency с) Backup d) Isolation e) Durability f the following Transaction Property makes sure befor ,…

A:

Q: Suppose we (incorrectly) modify the recovery algorithm of Section 19.4 tonote log actions taken…

A: Consider the given modifications to the recovery algorithm :

Q: When multiple transactions execute concurrently in an uncontrolled or unrestricted manner, then it…

A: When multiple transactions execute concurrently in an uncontrolled or unrestricted manner, then it…

Q: Explain why a transaction may have many cursors. Also, how is it possible that a transaction may…

A: GIVEN: Explain why a transaction may have many cursors. Also, how is it possible that a transaction…

Q: Given the following transaction database: Transaction IDe itemse I1, 12, 13ª 12, 13, 14ª 14, I5- I1,…

A: Below are transaction with minimum support of 60% using Apriori Algorithm.