1) How many serial schedules exist for the three transactions in the following figure? What are they? What is the total number of possible schedules? Transaction T₁ read_item(X); write_item(X); read_item(Y); write_item(Y); Transaction T₂ read_item(Z); read_item(Y); write_item(Y); read_item(X); write_item(X); Transaction T3 read_item(Y); read_item(Z); write_item(Y); write_item(Z);

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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1) How many serial schedules exist for the three transactions in the following figure?
What are they? What is the total number of possible schedules?
Transaction T₁₂
read_item(X);
write_item(X);
read_item(Y);
write_item(Y);
Transaction T₂
read_item(Z);
read_item(Y);
write_item(Y);
read_item(X);
write_item(X);
Transaction T3
read_item(Y);
read_item(Z);
write_item(Y);
write_item(Z);
Transcribed Image Text:1) How many serial schedules exist for the three transactions in the following figure? What are they? What is the total number of possible schedules? Transaction T₁₂ read_item(X); write_item(X); read_item(Y); write_item(Y); Transaction T₂ read_item(Z); read_item(Y); write_item(Y); read_item(X); write_item(X); Transaction T3 read_item(Y); read_item(Z); write_item(Y); write_item(Z);
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