2 Assume that we are using SJF scheduling and we have the following schedule of arriving transactions and durations Job Name Arrival Time Duration A 1 10 B 0 13 C 0 100 Please complete the following measures (round each answer to the closest integer, if necessary) What is the average turnaround time (show your work)? What is the average response time (show your work)?

2 Assume that we are using SJF scheduling and we have the following schedule of arriving transactions and durations Job Name Arrival Time Duration A 1 10 B 0 13 C 0 100 Please complete the following measures (round each answer to the closest integer, if necessary) What is the average turnaround time (show your work)? What is the average response time (show your work)?

A Guide to SQL

9th Edition

ISBN:9781111527273

Author:Philip J. Pratt

Publisher:Philip J. Pratt

Chapter6: Updating Data

Section: Chapter Questions

Problem 4SCG

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The lost update anomaly is said to occur if a transaction Tj reads a data item, then another transaction Tk writes the data item (possibly based on a previous read), after which Tj writes the data item. The update performed by Tk has been lost, since the update done by Tj ignored the value written by Tk. a. Give an example of a schedule showing the lost update anomaly. b. Give an example schedule to show that the lost update anomaly is possible with the read committed isolation level. c. Explain why the lost update anomaly is not possible with the repeatable read isolation level.
Consider a schedule with 4 transactions with 1, 2, 3, and 4 operations respectively. Calculate the possible number ofa) Serial schedulesb) Non serial schedules Please answer these question in detail with full explaination. I need a proper long answer. Thanks :)
1) Holiday Inn hires you to examine three hotel locations that can each use some updating. They have $4 million available for the updates. The future revenue projected for each hotel is tied to how much renovation is done, according to the following table: Renovation Amount Future Revenue (in millions) (in millions) $0 $1 $2 $3 Hotel A Hotel B Hotel C $4 $7 $8 $9 $3 $6 $10 $12 $14 $3 $7 $8 $13 $4 $11 $15 Use dynamic programming to determine how to best allocate the $4 million in renovations between the three hotels (assume you can only use $1 million increments).
We have the following transactions with associated schedulesT1: R(A) R(B) W(A)T2: R(A) R(B) W(A) W(B)a) Give the schedule of transactions T1 and T2 that leads to a WR conflict.b) Give the schedule of transactions T1 and T2 that lead to RW conflict.c) Give the schedule of transactions T1 and T2 that leads to a WW conflict.d) For each of the given schedules, show how a strict 2FZ would prevent this.
An university has decided to grant loans for the students. For this the financial administrator has to check with the number of students apply for loan with "Manage Loan and Grants" view. Student can enroll themself and apply for loan. Financial administrator will check whether the students has cleared the tuition fees up to last year, if the student is applying loan for current year tuition fee and enrollment was done for courses like seminars, etc. Professor will be allotted for the course once students got enrolled for subject. The actors involved in the system are student, scheduler, financial administrator and professor. The packages that are linked in the system are manage loan and grants, manage fees, manage seminars, enrollment. Identify the dependencies between one element and the other by drawing a package diagram for
A database has four transactions. Let min_sup 60% and min_conf = 80%. TID Date Items Bought {K, A, B, D} 10/15/2018 (D, A, C, E, B} {С, А, В, E) (В, А, D} 100 10/15/2018 200 300 10/19/2018 400 10/22/2018 Find all frequent items using Apriori and FP-growth respectively. Compare the efficiency of the (i) two meaning process.
Consider a schedule with 3 transactions with 2, 3, and 4 operations respectively. Calculate the possiblenumber ofc) Serial schedulesd) Non serial schedules
The following table presents the lock requests by transactions T1, T2, T3, and T4. S(.) and X(.) stand for shared lock' and `exclusive lock', respectively. To prevent deadlocks, use a lock manager that uses the Wait-Die policy. Assume the four transactions have priority: T1 < T2
a) Given the set of transactions in the table, compute the support for itemsets {e}, {b, d), and {b, d, e} by treating each transaction ID as a market basket. Transaction ID 0001 0024 0012 0031 0015 0022 0029 0040 0033 0038 Items Bought {a, d, e} {a,b,c, e} {a, b, d, e} {a, c, d, e} {b, c, e} {b, d, e} {c,d} {a,b,c} {a, d, e} {a,b, e} b) Use the results in part (a) to compute the confidence for the association rules {b, d} →→ {e} and {e}-{b, d).
The follow questions refer to the transaction schedule below, that records bookings of tickets for a harbour cruise. TIME ID TRANSACTION ID OPERATION 1 A Read Tickets left = 10 2 B Read Tickets left = 10 3 B Purchase 8 Tickets 4 A Purchase 6 Tickets 5 6 Using the transaction schedule above, explain the lost update problem Using the transation schedule above, explain how the two-phase locking protocol would prevent the lost update from occurring Using the transaction schedule above, explain the concept of Isolation as it relates to transaction management
4) You are asked to calculate the weekly take home pay for a group of employees at your company (for each Employee ID). The employees in this group have a wage rate of 35 ÚSD per hour and 65 USD per hour when they work overtime. The following table list the hours work by the employees. Employee ID Regular hours Overtime hours 87 40 3 43 40 8. 99 32 40 15
Assume that we are using SJF scheduling and we have the following schedule of arriving transactions and durations Job Arrival Name Time A B C 1 0 0 Duration 10 13 100 Please complete the following measures (round each answer to the closest integer, if necessary) What is the average turnaround time (show your work)? What is the average response time (show your work)?