Multiple choice technology architecture

Which of the following are true about Active Replication?

  1. It is a fault-tolerance mechanism.

  2. It is achieved by taking cold back ups.

  3. Each replica attempts to process each request but extra calls may be intercepted via an interceptor.

  4. State changes are logged and periodically flushed to the replicas.

  5. State is synchronized only when the primary service fails.

  6. Each replica is identical to the main service.
Reveal answer Fill a bubble to check yourself
A,C,F Correct answer
Explanation

Active replication is a fault-tolerance mechanism where multiple identical replicas run concurrently. Each replica processes every request, with coordination mechanisms to handle redundant calls. All replicas are identical copies of the main service, ensuring any replica can take over if another fails.

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