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Computer Engineering
Daniel and Lisa have a joint saving account, and both want to withdraw some cash at the same time, each using an ATM terminal at a different location. The balance in the account is $1000. Daniel withdraws $500 from the account and a few second later, Lisa withdraw $400. Based on this situation, answer the following questions: 1. Using a diagram, show the problem of lost updates when currency control mechanism is not established. 2.Using a different diagram, show how the problem of lost updates could be solved using a locking mechanism.

Daniel and Lisa have a joint saving account, and both want to withdraw some cash at the same time, each using an ATM terminal at a different location. The balance in the account is $1000. Daniel withdraws $500 from the account and a few second later, Lisa withdraw $400. Based on this situation, answer the following questions: 1. Using a diagram, show the problem of lost updates when currency control mechanism is not established. 2.Using a different diagram, show how the problem of lost updates could be solved using a locking mechanism.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Daniel and Lisa have a joint saving account, and both want to withdraw some cash at the same time, each using an ATM terminal at a different location. The balance in the account is $1000. Daniel withdraws $500 from the account and a few second later, Lisa withdraw $400. Based on this situation, answer the following questions: 1. Using a diagram, show the problem of lost updates when currency control mechanism is not established. 2.Using a different diagram, show how the problem of lost updates could be solved using a locking mechanism.
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