Free OMG OMG-OCRES-A300 Practice Test & Real Exam Questions

Exam Code/Number: OMG-OCRES-A300
Exam Name/Title: OMG-Certified Real-time and Embedded Systems Specialist Advanced Exam
Certification Provider: OMG
Corresponding Certification: OMG Certification

Exam Questions: 180
Updated On: Aug 26, 2026

Question #14

Which distributed system scheduling case is specifically addressed by RT-CORBA / Dynamic
Scheduling?

A. Scheduling occurs independently on each node, application behavior involving more than one node
propagates its end-to-end timeliness context for use by each nodes scheduler.

B. Scheduling occurs completely independently on each node; application behaviors involving more than
one node do NOT have a trans-node end-to-end timeliness requirement.

C. Scheduling on each node is global with a logically singular system-wide scheduling algorithm
instantiated on all nodes, and node instances interacting to create a globally optimum schedule for all
nodes.

D. Multi-level scheduling seeks to improve global optimality by adaptively adjusting combinations of
scheduling parameter elements, scheduling contexts, algorithms, and disciplines; schedulable entity; and
node load balancing.

Discussion 0

Correct Answer: A Vote an answer

Question #15

Which statement is true when domains are modeled using the Profile for SPT?

A. Performance measures for a system include only the combined waiting times, execution demands and
response time for the resources.

B. Scenario steps are the elements of scenarios, and are joined in a sequence, with
predecessor-successor relationships that may include forks, joins, and loops.

C. In performance-related models, each scenario is executed by a job class or user class which is
identical to other UML Classes.

D. Resources are modeled as servers with passive resources being the usual servers in performance
models that are acquired and released during scenarios, and have holding times.

Discussion 0

Correct Answer: B Vote an answer

Question #16

Which is an attribute of RTCclient?

A. capacity

B. clientScenario

C. host

D. clientPriority

Discussion 0

Correct Answer: D Vote an answer

Question #17

Which listener is NOT defined in the DLRL?

A. ContractListener

B. CacheListener

C. SelectionListener

D. ObjectListener

Discussion 0

Correct Answer: A Vote an answer

Question #18

What is the difference between static and dynamic variables?

A. Static variables are used to save memory space in lieu of dynamic variables.

B. Static variables have global visibility while dynamic variables are restricted to individual components.

C. Static variables exist for as long as the program runs, while dynamic variables are created and
destroyed by the program and scoping rules.

D. Static variables have a set value for the lifetime of the program, while dynamic variables can change
value as determined by the program.

Discussion 0

Correct Answer: C Vote an answer

Question #19

Which statement is NOT true about a PSM?

A. It must always be able to produce an implementation.

B. It always includes a detailed model of the platform.

C. It must always include all details necessary to produce an implementation.

D. It may abstract away some of the platform details

Discussion 0

Correct Answer: B Vote an answer

Question #20

Which statement is true about an assembly-based implementation in the Deployment and Configuration
specification?

A. It can NOT have ports or properties (implements the empty interface).

B. It may have ports and properties, which are mapped to subcomponents' ports and properties.

C. It can only expose the ports and properties of a single subcomponent's interface.

D. It may have ports, which are mapped to subcomponents' ports; properties can only be accessed via
ports.

Discussion 0

Correct Answer: B Vote an answer

Question #21

Which statement is true about the viewpoints defined in the UML Profile for SPT?

A. The Harel State Viewpoint uses state model diagrams to capture timely behaviors of system
transactions across the various processing nodes.

B. The UML Viewpoint uses scenarios which are most directly modeled using only activity graphs.

C. The Collaboration Viewpoint uses scenarios that are mapped onto specific instances in order to define
end point latencies.

D. The Domain Viewpoint uses scenarios to define response paths whose end points are externally
visible.

Discussion 0

Correct Answer: D Vote an answer

Question #22

The Lightweight CCM Profile retains which two capabilities of the CORBA Component Model? (Choose
two.)

A. event source and sink ports

B. components with transient state

C. Component Implementation Definition Language

D. navigation between component ports

Discussion 0

Correct Answer: A,B Vote an answer

Question #23

The UML profile for Modeling QoS and Fault Tolerance provides which model as one way to perform a
risk assessment?

A. Situational Model

B. Risk Mitigation Model

C. Enterprise Analysis Model

D. Unwanted Incident Model

Discussion 0

Correct Answer: D Vote an answer

Question #24

Which is a characteristic of a Connection object presented to the message layer by a plugged in
transport?

A. Bi-directional

B. Un-reliable

C. Oneway

D. Multithreaded

Discussion 0

Correct Answer: A Vote an answer

Question #25

A 'strongly typed' programming language is subject to which two rules? (Choose two.)

A. Data object names must be in strong Hungarian notation.

B. Data objects must be of the same type during assignments unless actively overridden.

C. Every data object must belong to one unique type.

D. All data objects are strongly associated to a local scope.

Discussion 0

Correct Answer: B,C Vote an answer

Question #26

Which statement describes a scheduling discipline?

A. "Maximum Accrued Utility" associates a utility function with each thread in order to create a dispatching
rule.

B. "Earliest Deadline First" only satisfies the soft real-time criterion minimize number of missed
deadlines".

C. "Least Laxity First" requires the knowledge of estimated execution time for each thread.

D. "Fixed Priority" is the only scheduling discipline that allows hard real time requirements to be met.

Discussion 0

Correct Answer: C Vote an answer

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