OMG UM0-401 Actual Free Exam Questions & Community Discussion

Exam Code/Number: UM0-401
Exam Name/Title: Omg OCRES-Intermediate Exam
Certification Provider: OMG
Corresponding Certification: OMG Certification

Exam Questions: 180
Updated On: May 30, 2026

Question #19

The Lightweight Event Service raises-------------------

A. a CORBA User Exception when attempting to transfer an event if no Event Channel exists to handle it

B. an exception after an attempt to connect a consumer or supplier to a proxy where a connection already exists

C. an exception if a supplier is disconnected from the event channel without its knowledge

D. an exception if any objects directly or indirectly connected to an Event Channel still exist after the Event Channel is destroyed

Discussion 0

Correct Answer: B Vote an answer

Question #20

In MDA practice, transformations from PIM to PSM---------------- (Choose TWO.)

A. may be automated

B. may be hand generated

C. are always implemented in the QVT action language

D. are required for all systems

E. always produces executable code

Discussion 0

Correct Answer: A,B Vote an answer

Question #21

What time scales does the Lightweight Time Service support? (Choose two.)

A. Ephemeris time

B. Global Positioning System Time

C. International Atomic Time

D. Terrestrial Dynamical Time

Discussion 0

Correct Answer: B,C Vote an answer

Question #22

If the ORB cannot map the configured range of priorities, CORBA::ORB_init will raise _____.

A. BAD_INV_ORDER with minor code 18

B. MARSHAL with minor code 4

C. INITIALIZE with minor code 1

D. DATA_CONVERSION with minor code 2

Discussion 0

Correct Answer: D Vote an answer

Question #23

The Lightweight Event Service provides an interface for ___.

A. event consumers to request (poll) events from event suppliers

B. an asynchronous, one-to-one, first-in, first-out (FIFO) event channel

C. storing events in an event channel, from which they are polled by listeners

D. suppliers to push events to an event channel, which in turn pushes events to consumers

Discussion 0

Correct Answer: D Vote an answer

Question #24

Which classes are DDS Entities? Select THREE.

A. Data Writer

B. Topic

C. Condition

D. Domain Participant

E. Publisher Listener

Discussion 0

Correct Answer: A,B,D Vote an answer

Question #25

Max_buffered_requests or max_request_buffer_size has been reached, and new requests are incoming. What two actions occur? (Choose two.)

A. oldest requests are discarded

B. exception NO_RESOURCES is raised

C. exception NO_RESOURCES is raised after a timeout

D. newer requests are discarded

Discussion 0

Correct Answer: B,D Vote an answer

Question #26

An operation declaration must contain which two of these? (Choose two.)

A. A raises expression

B. An indication of the operation's return result data type

C. An identifier to name the operation

D. An operational attribute to specify the invocation semantics

Discussion 0

Correct Answer: B,C Vote an answer

Question #27

For the Server Declared Priority Model, which statements are true? (Choose two)

A. The value ofserver_priority is published in its object reference.

B. The value ofserver_priority indicates the priority that will be assigned by default to CORBA objects managed by the POA.

C. The value ofserver_priority cannot be overridden.

D. The value ofserver_priority is passed in each reply message.

Discussion 0

Correct Answer: A,B Vote an answer

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