Practice Event Ordering (Logical Clocks) - 11.2.1 | Module 11: Distributed Systems - Principles and Challenges | Operating Systems
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11.2.1 - Event Ordering (Logical Clocks)

Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is the purpose of using logical clocks in distributed systems?

💡 Hint: Consider why global time synchronization is challenging.

Question 2

Easy

What does Lamport's 'happened-before' relation indicate?

💡 Hint: Think about the sequence of actions.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What does the term 'happened before' imply in distributed systems?

  • One event could not have happened without the other
  • Events can occur at any time
  • Timestamp are always equal

💡 Hint: Think about which events influence others.

Question 2

True or False: Lamport logical clocks can completely replace the need for synchronized physical clocks.

  • True
  • False

💡 Hint: Consider the limitations of logical clocks.

Solve 1 more question and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

Suppose you have a distributed system where three processes P1, P2, and P3 interact. Describe how you would use Lamport clocks to track event ordering if each process executes an internal event and sends messages in a particular sequence. What would the resulting timestamps look like?

💡 Hint: Remember to increment before sending and adjust upon receiving.

Question 2

Imagine two events occur in two different processes concurrently, but later, one of them sends a message to the other. If you apply vector clocks, how can you determine the relationship between the two events?

💡 Hint: Draw out a scenario with vector timelines to visualize.

Challenge and get performance evaluation