Consider a schedule with 4 transactions with 1, 2, 3, and 4 operations respectively. Calculate the possible number of a) Serial schedules b) Non serial schedules Please answer these question in detail with full explaination. I need a proper long answer. Thanks :)

Consider a schedule with 4 transactions with 1, 2, 3, and 4 operations respectively. Calculate the possible number of a) Serial schedules b) Non serial schedules Please answer these question in detail with full explaination. I need a proper long answer. Thanks :)

Database Systems: Design, Implementation, & Management

12th Edition

ISBN:9781305627482

Author:Carlos Coronel, Steven Morris

Publisher:Carlos Coronel, Steven Morris

Chapter10: Transaction Management And Concurrency Control

Section: Chapter Questions

Problem 7P

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Concept explainers

Transaction Processing

Transaction processing is a computational style generally performed by server computers, which supports interactive applications (apps). Transaction processing is also known as information processing, which divides the work into indivisible and individual operations called transactions. The transaction is a set of tasks; a single task is considered as the minimum processing unit that cannot be divided again.

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Consider a schedule with 4 transactions with 1, 2, 3, and 4 operations respectively. Calculate the possible number of
a) Serial schedules
b) Non serial schedules

Please answer these question in detail with full explaination. I need a proper long answer. Thanks :)

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Consider a schedule with 3 transactions with 2, 3, and 4 operations respectively. Calculate the possiblenumber ofc) Serial schedulesd) Non serial schedules
Consider a schedule with 4 transactions with 1, 2, 3, and 4 operations respectively. Calculate the possible number of a) Serial schedules b) Non serial schedules
Let Tran1,Tran2 & Tran3 be three independent transactions. Where Tran1 transfers the one fourth of the A accounts fund to B account. Tran2 updates the balance of the B account by 32% & Tran3 transaction provides two third of the prior balance of the A account (before providing funds to B account) to the charity account. Now write down the concurrent transactions according to the serial given above.
67. A ___________ is one where, for each pair of transactions Ti and Tj such that Tj reads a data item previously written by Ti , the commit operation of Ti appears before the commit operation of Tj a. Partial schedule b. Dependent schedule c. Recoverable schedule d. None of the mentioned
Subject code - rcs502 Consider 3 transactions T₁, T₂ and T3 having 2, 3 and 4 operations respectively. Find number of concurrent schedules. (a) 630 (c) 2520 (b) 1260 (d) 2440 I will downvote ,if u do anything wrong.
Consider two transactions are using a joint account, j. The first transaction attempts to transfer money to b1 and the second transaction attempts to transfer money to b2. Discuss whether the following event can happen. 1) Lost update 2) Deadlock Use an appropriate example/scenario including the interleaving steps if an event can arise or provide a reason if it is not possible for an event to happen.
[ [ Commit The schedule above is for the transactions T1, T2, and T3 1- explain whether it is a serializable or not 2- explain whether that cause cascading aborts If any of the transactions aborts 3- Propose a modification to the given schedule draw it and explain how it produces a deadlock (you may include new R and W operations for any of the transactions), in your new schedule a deadlock must be produced when the strict two-phase locking protocol is used.
Consider a table Products(name, price). There are two tuples in Products: ('OK',2000) and ('Good',3000). Consider the following two concurrent transactions, each of which runs once and commits. Transaction 1 ----------------- Begin Transaction insert into Products values (`Awesome',4000); update Products set price = price+300 where name=’OK’; commit; Transaction 2 ----------------- Begin Transaction select sum(price) from Products; select sum(price) from Products; commit; The databases serializability module stopped working. What possible values (consistent and inconsistent) can be obtained for the two sum(price) SELECT statements ? NOTE: The second transaction is consisting of only read statements. It may be scheduled between Transaction 1 and may read incosistent values.
Assume that two concurrent executing transactions T₁ and T₂ are allowed to update same stock item say 'A' in an uncontrolled manner. In such scenario. Give the problems no concurrency module and allows concurrent execution.
Explain optimistic and pessimistic timestamp ordering (TO) with an example scenario of two concurrent transactions.
Consider the schedule S1 consists of three transactions T1, T2, T3 as the following: Answer the following question: Is the schedule S1 cascadeless and recoverable? Justify your answer. Draw the precedence graph of schedule S1 Is S1 conflict-serializable? Explain briefly. If S1 is conflict-serializable, write down all equivalent serial schedules.
W-timestamp(Q) is the biggest timestamp of any transaction that successfully completed write(Q). Instead, let's say we specified it as the timestamp of the most recent transaction that successfully executed write(Q). Is it possible that this adjustment in language will make a difference? Explain your response.

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