Computer Science: An Overview (12th Edition)
12th Edition
ISBN: 9780133760064
Author: Glenn Brookshear, Dennis Brylow
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Expert Solution & Answer
Chapter 9, Problem 43CRP
Explanation of Solution
Incorrect information in the schedule of transactions
- The sequence of transaction is:
- Transaction
- Transaction
- Transaction
- Transaction
- The step (ii) adds the amount of
- When step (iii) retrieves the value of B, it is not true value but the value of B after addition of
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
2. DEL
Transactions:
The following transaction schedule is given. A,B,C are the addresses of the records
in the database and T1, T2 and T3 are the transactions.
T1
R(A)W(A)
R(C)
R(B)W(B)C
T2
T3
R(B)
W(B)
R(C)
R(B)W(B)
R(A)
с
a) Show an example of a strict 2PL implementation that leads to a deadlock
b) For a) draw a >>wait-for<< graph
c) Avoid the previously drawn deadlock with a wait-die<< policy
d) Give an example of another schedule that would be conflict-equivalent to the
given schedule of transactions
W(A)C
Each Semuarasa restaurant branch has a mainstay menu that is very popular with customers, so information on the availability of the number of servings is needed to be able to serve orders. Here are two transactions that are ordering a food menu at the same time.
T1: Start the transaction at time t1, read 10 servings of food stock at t2. Because ordering one portion, the stock is reduced by 1 at t3. On t6, update the stock count, and commit to t7.
T2: Transaction T2 starts a transaction on t2, reads the number of stocks in t3 as many as 10. At t4 orders 3 portions. On t5 it updates the stock to 7 and then on t6 commits it.
As a result of the T1 and T2 transactions above, there was an incorrect amount of food stock. Make a solution with 2PL. What kinds of problems happened? Give a reason why choosing this type of problem! How much food is still available?
A very large number of Customer objects must be added to the database.
Each time a new object is to be added, the following statement is executed
to ensure that there is enough space for it:
if (number>=capacity)
enlarge_database (number+1);
Approximately how many simple operations (copying a Customer object
from one location to another) must be performed in total when N (N is a
very large number) customers are added to the database
i.
with the new size as specified above, number+1?
ii.
if the new size calculation is changed to number+100?
iii.
if the new size calculation is changed to number*2?
Chapter 9 Solutions
Computer Science: An Overview (12th Edition)
Ch. 9.1 - Identify two departments in a manufacturing plant...Ch. 9.1 - Prob. 2QECh. 9.1 - Summarize the roles of the application software...Ch. 9.2 - Prob. 1QECh. 9.2 - Prob. 2QECh. 9.2 - Prob. 4QECh. 9.2 - Prob. 5QECh. 9.2 - Prob. 6QECh. 9.3 - Prob. 1QECh. 9.3 - What is a persistent object?
Ch. 9.3 - Identify some classes as well as some of their...Ch. 9.3 - Prob. 4QECh. 9.4 - Prob. 1QECh. 9.4 - Prob. 2QECh. 9.4 - Prob. 3QECh. 9.4 - Prob. 4QECh. 9.4 - Prob. 5QECh. 9.4 - Prob. 6QECh. 9.5 - Prob. 1QECh. 9.5 - Prob. 2QECh. 9.5 - Prob. 3QECh. 9.5 - Prob. 4QECh. 9.5 - Prob. 5QECh. 9.5 - Prob. 6QECh. 9.5 - Prob. 7QECh. 9.6 - Prob. 1QECh. 9.6 - Give an additional example of a pattern that might...Ch. 9.6 - Prob. 3QECh. 9.6 - How does data mining differ from traditional...Ch. 9.7 - Prob. 1QECh. 9.7 - Prob. 2QECh. 9.7 - Prob. 3QECh. 9.7 - Prob. 4QECh. 9 - Prob. 1CRPCh. 9 - Prob. 2CRPCh. 9 - Prob. 3CRPCh. 9 - Prob. 4CRPCh. 9 - Prob. 5CRPCh. 9 - Prob. 6CRPCh. 9 - Prob. 7CRPCh. 9 - Prob. 8CRPCh. 9 - Prob. 9CRPCh. 9 - Prob. 10CRPCh. 9 - Prob. 11CRPCh. 9 - Prob. 12CRPCh. 9 - Using the commands SELECT, PROJECT, and JOIN,...Ch. 9 - Answer Problem 13 using SQL. PROBLEM 13 13. Using...Ch. 9 - Prob. 15CRPCh. 9 - Prob. 16CRPCh. 9 - Prob. 17CRPCh. 9 - Prob. 18CRPCh. 9 - Prob. 19CRPCh. 9 - Empl Id Name Address SSN Job Id Job Title Skill...Ch. 9 - Empl Id Name Address SSN Job Id Job Title Skill...Ch. 9 - Prob. 22CRPCh. 9 - Prob. 23CRPCh. 9 - Prob. 24CRPCh. 9 - Prob. 25CRPCh. 9 - Write a sequence of instructions (using the...Ch. 9 - Prob. 27CRPCh. 9 - Prob. 28CRPCh. 9 - Prob. 29CRPCh. 9 - Prob. 30CRPCh. 9 - Prob. 31CRPCh. 9 - Prob. 32CRPCh. 9 - Prob. 33CRPCh. 9 - Prob. 34CRPCh. 9 - Prob. 35CRPCh. 9 - Prob. 36CRPCh. 9 - Prob. 37CRPCh. 9 - Prob. 38CRPCh. 9 - Prob. 39CRPCh. 9 - Prob. 40CRPCh. 9 - Prob. 41CRPCh. 9 - Prob. 42CRPCh. 9 - Prob. 43CRPCh. 9 - Prob. 44CRPCh. 9 - Prob. 45CRPCh. 9 - Prob. 46CRPCh. 9 - Prob. 47CRPCh. 9 - Prob. 48CRPCh. 9 - Prob. 49CRPCh. 9 - Prob. 50CRPCh. 9 - Prob. 51CRPCh. 9 - Prob. 52CRPCh. 9 - Prob. 53CRPCh. 9 - Prob. 54CRPCh. 9 - Prob. 55CRPCh. 9 - Prob. 56CRPCh. 9 - Prob. 57CRPCh. 9 - Prob. 58CRPCh. 9 - Prob. 59CRPCh. 9 - Prob. 60CRPCh. 9 - Prob. 61CRPCh. 9 - Prob. 62CRPCh. 9 - Prob. 1SICh. 9 - Prob. 2SICh. 9 - Prob. 3SICh. 9 - Prob. 4SICh. 9 - Prob. 5SICh. 9 - Prob. 6SICh. 9 - Prob. 7SICh. 9 - Prob. 8SICh. 9 - Prob. 9SICh. 9 - Prob. 10SI
Knowledge Booster
Similar questions
- branch(branchhame, branch+citysassets} customer (HD, Customer name, customer street, customer city) loan loan number branch_name, amounty borrower(ID; loan_number account (account_number, branch name, balance)e depositor (HDs account number)- Figure le Consider the bank database in Figure 1, where the primary keys are underlined. Each branch might have many loans or accounts, associated with borrowers or depositors, respectively. Construct the following SQL queries for this relational database. 1. Find the name of each branch that has at least one customer who has an account in the bank and who lives in the "Harrison" city. Make sure each branch name only appears once. 2. Find the ID of each customer who lives on the same street and in the same city as customer "12345". (1) Please use "tuple variables". e (2) Please use "derived relations" or “with". 3. Find the ID of each customer of the bank who has an account but not a loan. 4. Find the total sum of all loan amounts for each branch…arrow_forwardFor the following database scheme Employee(empNo,fName.IName.address.DOB.sex,position.deptNo) Department(deptNo.deptName,mgrEmpNo) Project(projNo.projName,deptNo) WorksOn(empNo.projNo.dateWorked,hoursWorked) Write an SQL statement to find all the details of employees who are femalearrow_forwardThe following are the basic processes of Boarding School Outing System. Student may enter the outing request such as date, reason, check-out time (check-in time is auto-set at 6.00 PM) to request for outing. The outing request details are stored in 'Outing Request' record. Warden can view the outing request and he/she may approve or disapprove the request. The status of the request is updated in the Outing Request' record. Once the status is updated, a short message service (SMS) notification will be sent by the system to the student and parents. The hand-phone numbers are retrieved from the Student' record. Student will check-out and check-in via this system whenever he/she is about to leave from the school and reports back to the school. The data (date and time) is kept in the existing outing record. Note: **Definition of outing (in boarding school context): A day out from the hostel/school, normally during the weekend. Based on the scenario above: a) Draw a Context Diagram for…arrow_forward
- For the following database scheme Employee(empNo.fName,IName,address,DOB,sex,position,deptNo) Department(deptNo.deptName,.mgrEmpNo) Project(projNo.projName,deptNo) WorksOn(empNo.projNo.dateWorked.hoursWorked) Write an SQL statement to produce a list of the total hours worked by each employee arranged in order of employee number Iarrow_forwardi need the answer quicklyarrow_forwardI just need the example for d)arrow_forward
- You need to use Java to connect with the mysql and create a simple mysql system. Databases "POS" have 4 tables 1. Staff_Info Staff_ID Staff_Name Staff_Pw Staff_Title 001 AA 1111 Manager 002 BB 2222 General Once the pos system opened, you need to ask the staff to enter the password. The manager can see the payment record if needed, which the general staff cannot. Food_Info Food_ID Food_Cat Food_Name Price 001 burger Classic burger 32 002 burger Chicken burger 38 003 side Fires 10 004 side Salad 15 005 beverage Coke 5 006 beverage Lemon Tea 8 There are only three categories of food, and 6 in total. Order_Info Order_ID Payment_ID Order_Item Order_Quantity Order_ID and Payment_ID should be automatically generated from 0001. Payment_Info Payment_ID Payment_Amount Payment_Date Payment_Time Payment_Method There are two types of…arrow_forwardAnswer the following prompts 1The InstantRide Management team founded a new team for car maintenance. The new team is responsible for the small maintenance operations for the cars in the InstantRide system. The main idea is to take actions faster and minimize the time spent for the maintenance. Therefore, the Car Maintenance team wants to store MAINTENANCE_TYPE_ID (char(5)) and a MAINTENANCE_TYPE_DESCRIPTION (varchar(30)) in the database. Using MAINTENANCE_TYPE_ID as the PRIMARY KEY, create a new table, MAINTENANCE_TYPES, and send the table description with the column names and types to the Car Maintenance team. 2The Car Maintenance team also wants to store the actual maintenance operations in the database. The team wants to start with a table to store CAR_ID (CHAR(5)), MAINTENANCE_TYPE_ID (CHAR(5)) and MAINTENANCE_DUE (DATE) date for the operation. Create a new table named MAINTENANCES. The PRIMARY_KEY should be the combination of the three fields. The CAR_ID and MAINTENANCE_TYPE_ID…arrow_forwardAnswer the questions using the database below. Tables and data contained in the database of a company that sells stationery products are given below. 1. Write the query listing the number and name of the customer who ordered the maximum quantity of the product named "Pen". When answering the questions, assume that each order will contain one type of product. PK: Primary Key FK: Foreign Key The queries should be prepared in MAMP program to run in MySQL. Trigger will be created by typing SQL command, not interfacearrow_forward
- A database used in an order-entry system is to contain information about customers, items, and orders. The following information is to be included. – For each customer: Customer number (unique) Valid “ship to” addresses (several per customer) Balance Credit limit Discount – For each order: Heading information: customer number, “ship-to” address, date of order. Detail lines (several per order), each giving item number, quantity ordered – For each item: Item number (unique) Warehouses Quantity on hand at each warehouse Item description For internal processing reasons, a “quantity outstanding” value is associated with each detail line of each order. [This value is initially set equal to the quantity of the item ordered and is progressively reduced to zero as partial shipments are made.] Design a database for this data. note : You were asked to convert the given ERD into relations and implement it into mysql workbench.arrow_forwardWhen it comes to union, just where does it make the most sense to make the argument that two select statements drawn from the same database are consistent with one another?arrow_forwardUnder what circumstances would it be reasonable to assume that two select statements from the same database are consistent with one another?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Database System ConceptsComputer ScienceISBN:9780078022159Author:Abraham Silberschatz Professor, Henry F. Korth, S. SudarshanPublisher:McGraw-Hill Education
Starting Out with Python (4th Edition)Computer ScienceISBN:9780134444321Author:Tony GaddisPublisher:PEARSON
Digital Fundamentals (11th Edition)Computer ScienceISBN:9780132737968Author:Thomas L. FloydPublisher:PEARSON
C How to Program (8th Edition)Computer ScienceISBN:9780133976892Author:Paul J. Deitel, Harvey DeitelPublisher:PEARSON
Database Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781337627900Author:Carlos Coronel, Steven MorrisPublisher:Cengage Learning
Programmable Logic ControllersComputer ScienceISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education
Database System Concepts
Computer Science
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:McGraw-Hill Education
Starting Out with Python (4th Edition)
Computer Science
ISBN:9780134444321
Author:Tony Gaddis
Publisher:PEARSON
Digital Fundamentals (11th Edition)
Computer Science
ISBN:9780132737968
Author:Thomas L. Floyd
Publisher:PEARSON
C How to Program (8th Edition)
Computer Science
ISBN:9780133976892
Author:Paul J. Deitel, Harvey Deitel
Publisher:PEARSON
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781337627900
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning
Programmable Logic Controllers
Computer Science
ISBN:9780073373843
Author:Frank D. Petruzella
Publisher:McGraw-Hill Education