Given the following transaction database: Transaction id Items t1 {1, 3, 4, 6} t2 {2, 3, 5} t3 {1, 2, 3, 5} t4 {2, 5,} t5 {1, 2, 3, 5} t6 {1, 2, 3, 5, 6} What is the output of the Apriori algorithm run on the previous transaction database with a minimum support of 50 % (i.e. 3 out of 6 transactions)? Working steps must be s

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: In timestamp ordering, W-timestamp(Q) denotes the largest timestamp of any transaction that executed…

A: Consider the case when the W-timestamp(Q) refers to the largest timestamp of the most recent…

Q: Suppose we have market basket data consisting of 100 transactions and 20 items. Compute the total…

A: Solution (a) Number of transactions =100 Number of item =20 Total number of association rule=…

Q: Consider the buffer replacement policies: 'Most Recently Used' and 'First in First Out': i.…

A: First in first out:  Here the oldest page is in the front of the queue.The page is replaced from…

Q: Q1. Suppose a transaction T accesses (for read or write operations), a certain set of objects…

A: According to the information given:- We have to consider the scenario to provide correct Concurrency…

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

A: Candidate keys are the attributes or set of attributes which will uniquely determine all the…

Q: Consider the following snapshot of a system: ALLOCATION МAX AVAILABLE C DABC A B D A B C D PO 1 4 3…

A:

Q: 1 a -[ ] ab - [ ) s for i in (Data.head(200) and Data1.tail(200)): 16 if i[-2] not in a:…

A: Here, it is a syntax error. Since += can't be write with spaces. so, here you are writing it with…

Q: Consider a database system that includes an atomic increment operation, in addition to the read and…

A: a) Serializability:   If two transactions have an I mode lock on the same item, then…

Q: Consider the following two transactions: T1 R(A), W(A), R(B), RIC) T2- W(C), R(B), R(A). W(B) Say…

A: Explanation: Strict 2PL is guaranteed conflict serializability and not just 2PL.

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: Consider the following two transactions: (SHOW WORK) T13: read(A); read(B); if A = 1 then B := B -…

A: Explanation: One must have basic information about ACID property and Serializability to solve this…

Q: Suppose you wish to handle a workload consisting of a large number of smalltransactions by using…

A: Answer: In a shared nothing parallel architecture, neither the memory nor the disk is shared between…

Q: Question 1 - Apriori Algorithm - Given the following transaction database: Transaction ide Itemse…

A: a) Given minimum support = 50%. Total number of items = 5 So, minimum support count = (number of…

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: 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 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: Suppose that in addition to the operations read and write, we allow an operationpred read(r, P),…

A: When two transactions do not approach a common record and yet conflict, the phantom phenomena are…

Q: Consider the following relation with 150,000 tuples, stored in 3,000 pages: STUDENTS(SID, Name,…

A: Answer: I have given answer.

Q: Let k=2 in the k-Anonymity model. Suppose we have the following database table, Race Black Black…

A: Definition of K-anonymity : " Let R(A1,...,An) is a table and QIR is the quasi-identifier of the…

Q: Consider 4 transactions T1, T2, T3, and T4 Transaction T1 has 5 transactions, T2 has 4 transactions,…

A: Scheduling where the operations of multiple transactions are interleaved. This might lead to a rise…

Q: The lost update anomaly is said to occur if a transaction Tj reads a data item, then another…

A: Solution : Consider the two transactions Tj and Tk, the lost update anomaly for a transaction is…

Q: A database has four transactions. Let min_support=60% and min conf=80% TID date Items_bought T100…

A: Contrast Categorical imperatives with FP expansion inefficiency: Essentially, FP-growth is an…

Q: Consider the following 2 transactions: T1: R(A); R(B); B=A+B; W(B) T2: R(B); R(A); A=A+B;…

A: Answer 1: In below , i am adding X lock and S lock.…

Q: We think other solution in bartleby is wrong so be carefull please. A database must store an…

A: The objective is to : To determine how many records can be stored per block (blocking factor) using…

Q: Suppose you wish to handle a workload consisting of a large number of smalltransactions by using…

A: In a shared nothing parallel architecture neither the memory nor the disk is shared between…

Q: Consider a database system that includes an atomic increment operation, inaddition to the read and…

A: a) To show the serializability when all transactions lock the data in the corresponding mode; Check…

Q: Consider the following sequence of 'logs' from transactions T1, T2, T3 and T4. Represent…

A:

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: Consider the following schedule of two transactions: R(B) B E 100 – B W(B) R(A) R(A) R(B) A E 10A +…

A:

Q: Given the following transaction dataset: Tid Items 10 A, C, D 20 B, C, D 30 A, B, C, D 40…

A: Given : Transactions with their IDS Tid Items 10 A, C, D 20 B, C, D 30 A, B,…

Q: Consider a relation R(a, b, c, d) containing 1 million records, where each page of the relation…

A:

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

A: Given the following schedule of the transaction W1(A) W2(A) W1(A) W2(A) W1(A)

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 transaction database represented by the matrix D: I1 I2 I3 I4 I5 I6 1 T1 1 T2 T3 1 1 T4…

A: Number in range [0,100]

Q: Consider the schedule below. Here, R(·) and W(·) stands for 'Read' and Write', respectively. T;…

A: We are given a schedule which contains 5 transactions in it. And these 5 transactions are performing…

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: Let relations r1(A, B, C) and r2(C, D, E) have the following properties: r1 has20,000 tuples, r2 has…

A: Hash join: Let assume no overflow occurs. Since, “r1” is smaller, the user uses it as the build…

Q: 3. We have the following two transactions. T1: A=A+ 1, B=B+2 T2: A=A * 1, B =B * 2 Suppose A = 1 and…

A: Required : Values of A and B  wait for graph

Q: If we apply a distributed version of the multiple-granularity protocol of Chapter 18 to a…

A: Given: if we apply a distributed version of the multiple-granularity protocol of Chapter 18 to a…

Q: In timestamp ordering, W-timestamp(Q) denotes the largest timestamp of any transaction that executed…

A: Given: In timestamp ordering, W-timestamp(Q) denotes the largest timestamp of any transaction that…

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: Consider the following two transactions:T13: read(A);read(B);if A = 0 then B := B + 1;write(B).T14:…

A: a) Two possible executions: Case 1: Consistency met: A=0 ∨ B=0 T ∨ F =T Case 2: Consistency met:…

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: 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.