Question:172 Which class acts as the factory used to construct WaitSet objects? A. Subscriber B. DataReader C. DomainParticipant D. DomainParticipantFactory E. There is no factory for WaitSet objects Answer:E Question:173 Which two conditions allow the value offered for the PRESENTATION QoS to be considered compatible with the value requested? (Choose two.) Question:174 Which one of these items is a valid value for the LIVELINESS QoS policy?