Virtual Labs

Maekawa's Quorum-Based Mutual Exclusion Algorithm

What is mutual exclusion in distributed systems?

a: A protocol to ensure that no two processes access a shared resource at the same time. Explanation

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b: A method for sharing resources among all processes. Explanation

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c: A way to increase the speed of computation. Explanation

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d: A technique for data replication. Explanation

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What is a quorum in the context of distributed systems?

a: A subset of processes in a system. Explanation

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b: The total number of processes. Explanation

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c: A specific type of message. Explanation

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d: A failure detection mechanism. Explanation

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Which of the following is a requirement for mutual exclusion?

a: Freedom from deadlock Explanation

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b: High-speed network Explanation

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c: Large memory Explanation

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d: All of the above Explanation

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In Maekawa's algorithm, what is the relationship between any two quorums?

a: They must have a non-empty intersection. Explanation

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b: They must be disjoint. Explanation

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c: They must be of the same size. Explanation

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d: They must include the same process. Explanation

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In a grid-based implementation of Maekawa's algorithm with N processes, what is the approximate size of each quorum?

a: 2 * sqrt(N) - 1 Explanation

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b: N/2 Explanation

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c: sqrt(N) Explanation

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d: N-1 Explanation

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What is the message complexity per critical section entry in a grid-based Maekawa's algorithm?

a: O(sqrt(N)) Explanation

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b: O(N) Explanation

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c: O(N^2) Explanation

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d: O(log(N)) Explanation

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What is a potential problem with Maekawa's algorithm?

a: Deadlock Explanation

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b: High message complexity Explanation

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c: Low scalability Explanation

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d: It only works for a small number of processes. Explanation

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How can the deadlock problem in Maekawa's algorithm be resolved?

a: By using a priority-based scheme for requests. Explanation

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b: By increasing the quorum size. Explanation

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c: By reducing the number of processes. Explanation

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d: By using a central coordinator. Explanation

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Maekawa's algorithm is an example of which type of mutual exclusion algorithm?

a: Non-token-based Explanation

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b: Token-based Explanation

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c: Centralized Explanation

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d: Hierarchical Explanation

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