Q. Consider the dining philosophers problem where 5 philosophers are involved. Assume that there are two types of philosophers. The first type named as lefty (L) picks up his left chopstick first and the second type called righty (R) picks up his right chopstick first. The behaviour of a righty is given below. Philosopher i: do{ wait(chopstick[(i+1) % 5]); wait(chopstick[i]); eat signal(chopstick[i]); signal(chopstick[(i+1) % 5]); } State whether the following sets of philosophers seating at the table may lead to a deadlock? Philosophers RRRRR (5 lefty philosophers) RRRLR (4/tighty, one lefty) LLLLL Deadlock / No Deadlock Deadlock No Deadlock Deadlock No Deadlock No Deadlock LLRRR RRLLL RIGHTY

Q. Consider the dining philosophers problem where 5 philosophers are involved. Assume that there are two types of philosophers. The first type named as lefty (L) picks up his left chopstick first and the second type called righty (R) picks up his right chopstick first. The behaviour of a righty is given below. Philosopher i: do{ wait(chopstick[(i+1) % 5]); wait(chopstick[i]); eat signal(chopstick[i]); signal(chopstick[(i+1) % 5]); } State whether the following sets of philosophers seating at the table may lead to a deadlock? Philosophers RRRRR (5 lefty philosophers) RRRLR (4/tighty, one lefty) LLLLL Deadlock / No Deadlock Deadlock No Deadlock Deadlock No Deadlock No Deadlock LLRRR RRLLL RIGHTY

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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