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ECS656U: Consensus Protocols and Paxos Quiz

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ECS656U: Consensus Protocols and Paxos Quiz

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Questions and Answers

What is a key feature of Lamport Timestamps when it comes to ordering events?

Causal relationship establishment

Partial ordering based on node weights (correct)

Total ordering based on event timestamps

Random ordering of events

Why do Lamport Timestamps only provide partial ordering?

Lack of synchronization among nodes

Insufficient timestamp precision

Incapability to handle concurrent events

Inability to compare equal timestamps (correct)

How can Lamport Timestamps be extended to achieve total ordering?

Introducing node weights for tie-breaking (correct)

Implementing causal relationships among events

Assigning each event a unique identifier

Using random assignment of ordering

In the context of the Chandy-Lamport algorithm, what does a process do upon receiving a snapshot request?

Sends the snapshot process its saved state Signup and view all the answers

What is a critical component for initiating the snapshot process in the Chandy-Lamport algorithm?

Saving its own state Signup and view all the answers

Which feature distinguishes Berkley's clock synchronization algorithm as an internal synchronization algorithm?

Incorporating only local clock adjustments Signup and view all the answers

What is one drawback of using Lamport Timestamps for total ordering?

Inability to track causality between events Signup and view all the answers

'Tie-breaking' in Lamport Timestamps refers to:

'Breaking' ties when timestamps are equal Signup and view all the answers

What happens to messages that do not have the snapshot token in the Chandy-Lamport algorithm?

They are forwarded to the snapshotting process. Signup and view all the answers

What is a crucial function of the weight assigned to each node in Lamport Timestamps for total ordering?

Resolving conflicts when timestamps are equal Signup and view all the answers