Which of the following statements is true? Select the correct answer.

Question

Options

• AWhen using WS-AtomicTransaction, services participating in a transaction vote on the outcome
• BWhen using WS-AtomicTransaction, services participating in a transaction use RPC protocols to
• CWhen using WS-AtomicTransaction, services participating in a transaction rely on the use of WS-
• DWhen using WS-AtomicTransaction, services do not actually participate in a transaction.

• A
  93% (38)
• B
  5% (2)
• D
  2% (1)

Explanation

Option A is correct because WS-AtomicTransaction uses a two-phase commit (2PC) protocol where all participating services act as voters - each service votes either "commit" or "abort," and a coordinator collects those votes to determine the final outcome, ensuring atomicity across distributed services.

Why the distractors fail:

• B is wrong because WS-AtomicTransaction is a SOAP/web services protocol built on WS-Coordination, not RPC protocols - it uses XML messaging, not remote procedure calls.
• C appears to be cut off, but any claim that WS-AtomicTransaction relies on some unrelated or incorrect dependency would be false; it relies on WS-Coordination for its coordination framework.
• D is the opposite of the truth - participation is the entire point; services are explicitly enlisted into the transaction by the coordinator.

Memory tip: Think of WS-AtomicTransaction as a democratic vote among microservices - everyone gets a say (commit or abort), and the coordinator tallies the result. If even one service votes "abort," the whole transaction rolls back, just like a unanimous-jury requirement.

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