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?

<p>Sends the snapshot process its saved state (D)</p> Signup and view all the answers

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

<p>Saving its own state (B)</p> Signup and view all the answers

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

<p>Incorporating only local clock adjustments (C)</p> Signup and view all the answers

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

<p>Inability to track causality between events (B)</p> Signup and view all the answers

'Tie-breaking' in Lamport Timestamps refers to:

<p>'Breaking' ties when timestamps are equal (B)</p> Signup and view all the answers

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

<p>They are forwarded to the snapshotting process. (A)</p> Signup and view all the answers

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

<p>Resolving conflicts when timestamps are equal (A)</p> Signup and view all the answers

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