Q. In case of failure, a new transaction coordinator can be elected by

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Q. In distributed systems, election algorithms assumes that

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Q. According to the ring algorithm, links between processes are

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Q. What are the characteristics of tightly coupled system ?

i) Different clock
ii) Use communication links
iii) Same clock
iv) Distributed systems

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Q. What are the characteristics of mutual exclusion using centralized approach ?

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Q. What are the characteristics of fully distributed approach ?

i) When responses are received from all processes, then process can enter its Critical Section
ii) When process exits its critical section, the process sends reply messages to all its deferred requests.
iii) It requires request,reply and release per critical section entry
iv) One processor as coordinator which handles all requests

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Q. What are the advantages of token(with rings) passing approach ?

i) One processor as coordinator which handles all requests
ii) No starvation if the ring is unidirectional
iii) There are many messages passed per section entered if few users want to get in section
iv) One processor as coordinator which handles all requests
v) Only one message/entry if everyone wants to get in

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Q. What is the characteristics of atomicity ?

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Q. What things are transaction coordinator is responsible for ?

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Q. Single coordinator approach has the following advantages :

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Q. Single coordinator approach has the following disadvantages :

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Q. What are the disadvantages of majority protocol ?

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Q. What are the parts of global unique identifier ?

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Q. Which are the two complementary deadlock-prevention schemes using time stamps ?

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