OMG Omg OCRES-Intermediate - UM0-401 Exam Questions [2026]

QUESTION NO: 1
Which QoS model element is represented by the UML model element Instance Specification?

A. QoSValue B. QoSSlot C. QoSCharacteristic D. QoSParameter

Correct Answer: A

QUESTION NO: 2
An operation declaration must contain which two of these? (Choose two.)

A. An indication of the operation's return result data type B. An identifier to name the operation C. A raises expression D. An operational attribute to specify the invocation semantics

Correct Answer: A,B

QUESTION NO: 3
Which two enumeration values of the priority model below are supported by RT CORBA? (Choose two.)

A. SERVER_DECLARED B. PER_OBJECT C. NATIVE D. CLIENT_PROPAGATED

Correct Answer: A,D

QUESTION NO: 4
What two specific profiles does the CORBA/e specification define? (Choose two.)

A. Fault Tolerant Profile B. Micro Profile C. CORBA Component Model Profile D. Compact Profile E. Real Time (Static Scheduling) Profile F. High Performance Profile

Correct Answer: B,D

QUESTION NO: 5
The Lightweight Event Service provides an interface for ___.

A. suppliers to push events to an event channel, which in turn pushes events to consumers B. event consumers to request (poll) events from event suppliers C. storing events in an event channel, from which they are polled by listeners D. an asynchronous, one-to-one, first-in, first-out (FIFO) event channel

Correct Answer: A

QUESTION NO: 6
Which class acts as the factory used to construct Data Reader objects?

A. Subscriber B. Domain Participant Factory C. Domain Participant D. Publisher

Correct Answer: A

QUESTION NO: 7
If the ORB cannot map the configured range of priorities, CORBA::ORB_init will raise _____.

A. DATA_CONVERSION with minor code 2 B. BAD_INV_ORDER with minor code 18 C. MARSHAL with minor code 4 D. INITIALIZE with minor code 1

Correct Answer: A

QUESTION NO: 8
Which one of these items is a valid value for the LIVELINESS QoS policy?

A. MANUAL_BY_PARTICIPANT B. MANUAL_BY_PUBLISHER C. MANUAL_BY_SUBSCRIBER D. MANUAL_BY_LISTENER

Correct Answer: A

QUESTION NO: 9
Under the Server Declared Priority Model, server priority can be over-ridden but will raise a BAD_PARAM system exception when:

A. the servant code does not run at the native priority corresponding to the CORBA priority provided B. the POA does not support the IMPLICIT_ACTIVATION option for the Implicit Activation Policy C. the semantics for name extensions to Portable Server::POA are not observed D. an invalid CORBA priority is applied or does not match the priority configuration of the POA

Correct Answer: D

QUESTION NO: 10
How are exceptions managed in Real-time CORBA?

A. managed using CORBA Standard System Exceptions with minor codes specialized for Real-time CORBA B. not specified C. managed entirely using CORBA Standard System Exceptions D. managed using specific RTCORBA Exceptions

Correct Answer: A

QUESTION NO: 11
What is an "implementation model"?

A. A model that includes C++ source code for all classes in the model. B. A PSM that provides all of the information needed to construct a system and put it into operation. C. A PIM that provides all of the information needed to construct a system and put it into operation. D. A file that is executable on some computer system.

Correct Answer: B

QUESTION NO: 12
Why would a real-time application be designed to be POSIX conformant?

A. to meet the tight memory requirements of a small embedded processor B. to enhance the probability that the application could be moved to other platforms C. because the application is being developed on a POSIX-compliant Windows system, so debugging is easy D. because the POSIX interfaces guarantee meeting application time constraints

Correct Answer: B