Correct Answer : All of the above
Explanation : Hazelcast’s distributed locking system supports automatic lock expiration, both pessimistic and optimistic locking, and deadlock detection.
Correct Answer : IMap
Explanation : IMap is a distributed key-value store in Hazelcast that can be used for distributed caching.
Correct Answer : They are fully ACID-compliant
Explanation : Hazelcast’s distributed transactions are fully ACID-compliant, meaning they provide Atomicity, Consistency, Isolation, and Durability guarantees.
Correct Answer : Serialised
Explanation : Hazelcast saves queue entries in serialised form by default.