OMG OMG Certifications OMG-OCSMP-MBA400 Questions & Answers

• Question 81:

  Choose the correct answer

  The director of field support for a company just found out that one of the company's systems engineers is a Model Based Systems Engineering expert, and wants to discuss how MBSE might impact how the company's products are supported In the field What is the most important aspect of system development methodologies the engineer Is likely to discuss?

  A. how field support operations can be modeled using MBSE methods

  B. how software design patterns can be used to suggest Pre Planned Product Improvement (P3I) opportunities

  C. how the system model can be used to facilitate change proposals, support plans, and training in the operational environment

  D. how operational evaluation (OPEVAL) plans can be developed and cross-checked In a system modeling environment, using DoDAF operational views

  Correct Answer: C

  The most important aspect of system development methodologies that the engineer is likely to discuss with the director of field support is how the system model can be used to facilitate change proposals, support plans, and training in the operational environment. The system model can provide a consistent and comprehensive view of the system's structure, behavior and performance throughout its lifecycle, and can help identify and evaluate potential changes, improvements or issues in the field. The system model can also help document and communicate the support requirements, procedures and resources for the system's operation and maintenance. The system model can also help design and deliver effective training programs for the system's users and operators. How field support operations can be modeled using MBSE methods, how software design patterns can be used to suggest Pre Planned Product Improvement (P3I) opportunities, and how operational evaluation (OPEVAL) plans can be developed and cross-checked in a system modeling environment are less important aspects of system development methodologies that may not be relevant or applicable to the director of field support's concerns. References: OMG-Certified Systems Modeling Professional - Model Builder ?Advanced (OCUP2-ADV) Examination Guide Version 1.0, Section 4.5

• Question 82:

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  A small project has chosen a widely-used SysML-based development method, and plans to tailor the method over the life of the project.

  What Is(are) the most important consideration(s) for selecting a tool to support the project? \

  Choose the option that gives the project the most flexibility

  A. ability to interface with other tools that support the method

  B. built-in support for the method, including documentation and context-specific help

  C. built-m support for the method, mechanisms for user-defined extensions to the tool

  D. built-in support for the method: vendor commitment to provide tool tailoring for the project

  Correct Answer: C

  This is the most important consideration for selecting a tool to support the project because it gives the project the most flexibility. A built-in support for the method means that the tool has features and functions that are aligned with the SysMLbased development method chosen by the project. This can include documentation, context- specific help, templates, wizards, etc. A built-in support for the method can help the project to follow the method more easily and consistently. A mechanism for user-defined extensions to the tool means that the tool allows users to customize or modify the tool according to their needs and preferences. This can include adding new features, changing existing features, creating new views or reports, etc. A mechanism for user-defined extensions to the tool can help the project to tailor the method over the life of the project and adapt to changing requirements or situations.

• Question 83:

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  Which feature needs to be added to the systems development environment to conduct a performance simulation?

  A. numerical solver

  B. object constraints

  C. parametric diagrams

  D. high-level architecture

  Correct Answer: A

  This feature needs to be added to the systems development environment to conduct a performance simulation because it enables users to solve mathematical equations and models that represent system performance. A numerical solver is a software tool that can perform numerical analysis and computation on a given problem or model. A numerical solver can help users to evaluate system performance by solving equations that describe system behavior, properties, constraints, etc. A numerical solver can also help users to optimize system performance by finding optimal solutions or trade-offs for a given problem or model.

• Question 84:

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  The lead systems engineer on a project has identified a set of Key Performance Parameters (KPPs) that need to be evaluated both on a periodic basis during development, and during acceptance for everydesign change. Many of these KPPs are expressed In complex, interrelated differential equations The analysis team has identified appropriate numerical techniques for solving these equations and expressed them in a popular analysis tool.

  The lead system modeler and methodologist must ensure that the architecture and design captured in the SysML system model are continuously and accurately reflected In the KPP calculations.

  Which strategy is likely to be most successful in accomplishing this?

  A. Task the analysis learn with recasting each of the KPP equations as constraint blocks and parametric models directly in SysML and linking the resulting parameters to value properties of current system model elements Keeping all information in the same model is the only way to guarantee the consistency the lead engineer has asked for

  B. List the parameters used to evaluate the KPPs in a spreadsheet file. Use the SysML modeling tool's inherent capability to link appropriate value properties to cells in this spreadsheet Task the analysis team with modifying their analysis routines to accept parameters as an input vector from this spreadsheet. Ensure that the spreadsheet is updated from the system model prior to each update of the KPP calculations

  C. Work with the analysis team to partition the KPP evaluation model into manageable, reusable subroutines Develop constraint blocks within the SysML model to represent these subroutines, exposing their parameters. Use these new constraint blocks to build a parametric model that ties the KPP evaluation directly to system model element value properties. Leverage available bridging software to link this parametric model to the evaluation subroutines executing in the external analysis tool, and re-evaluate the KPPs on an as-needed basis

  D. Use activity and/or state models to accurately model the flow of data to numerically solve the KPP evaluation equations Ensure that the analysis team validates these behavior models Bind each relevant value property within the system model to an activity parameter or state variable such that the KPP evaluation model accurately reflects how the KPPs are derived. Next, use code generation capability inherent in the SysML tool to generate and compile the KPP evaluation routines Recompile and run these routines as needed to update KPP estimates

  Correct Answer: B

• Question 85:

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  For a system with stringent real-time requirements and power-consumption constraints, which concern would lead the designer to employ the MARTE profile?

  A. ensuring traceability between structure and behavior

  B. ensuring traceability between requirements and structure

  C. ensuring that the structure could be precisely modeled and that analysis was supported

  D. ensuring that the relationship between system response time and power consumption could be captured in a parametric diagram

  Correct Answer: A

  For a system with stringent real-time requirements and power-consumption constraints, the concern that would lead the designer to employ the MARTE profile is ensuring that the structure could be precisely modeled and that analysis was supported. MARTE provides concepts and annotations for modeling the structure of real-time and embedded systems in terms of components, ports, connectors, flows, etc., as well as for modeling their behavior in terms of state machines, activities, etc. MARTE also provides concepts and annotations for performing analysis of system properties, such as schedulability, performance, power consumption, etc., using various methods and tools.

• Question 86:

  Choose the correct answer.

  What is one of the most common reasons to utilize a SysML-Modehca integration?

  A. to solve and analyze system advanced statistics models

  B. to solve and analyze system dynamics models

  C. to execute and analyze system activity models

  D. to execute and analyze system state machine models

  Correct Answer: B

  One of the most common reasons to utilize a SysML-Modelica integration is to solve and analyze system dynamics models. Modelica is a language for modeling complex physical systems based on equations and components. SysML is a language for modeling complex systems based on diagrams and textual notations. By integrating SysML and Modelica, system dynamics models can be defined in SysML using parametric diagrams and constraint blocks, and then solved and analyzed using Modelica tools and solvers.

• Question 87:

  Choose the correct answer.

  A model is being built using constructs defined in a Quality profile Project requirements state that the model must only be built using the constructs defined In the Quality profile - no other metaclasses may be used.

  Which diagram fragment correctly expresses this requirement?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: C

  The diagram fragment that correctly expresses the requirement that the model must only be built using the constructs defined in the Quality profile is Option C. This option shows an Apply relationship between the model and the profile with the {strict} keyword applied. This means that only elements with stereotypes from the Quality profile can be created as instances of the extended metaclasses. References: https://www.omg.org/ocsmp/ocsmp-adv-exam.htm https://www.ibm.com/docs/SSB2MU_8.2.0/com.ibm.rhp.sysml.doc/topics/rhp_c_ dm_sysml_profile_features.html

• Question 88:

  Choose the correct answer.

  How should stereotypes be grouped to facilitate re-use in later projects?

  A. in profiles

  B. in packages

  C. in metamodels

  D. in sub-models

  Correct Answer: A

  Stereotypes should be grouped in profiles to facilitate re-use in later projects. A profile is a mechanism for extending UML or SysML with additional modeling elements that are not part of the standard language. A profile defines stereotypes, which are extensions of existing metaclasses. A profile can be applied to a model to make the stereotypes available for use. Bygrouping stereotypes in profiles, they can be easily reused in different models or projects.

• Question 89:

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  An engineer wants to place formal pre-conditions and post-conditions on an activity diagram.

  Which language is suitable and most compatible with SysML?

  A. BPMN

  B. English

  C. OCL

  D. OWL

  E. VSL

  F. XMI

  G. XML

  Correct Answer: C

  OCL is the most suitable and compatible language for placing formal pre- conditions and post-conditions on an activity diagram. OCL is part of the UML standard and can be integrated withSysML without any conflicts or inconsistencies. OCL can express complex logical expressions that can check the state of the system before and after an activity is executed. BPMN is a business process modeling language that is not compatible with SysML. English is a natural language that may not be precise or unambiguous enough for formal specifications. OWL is a web ontology language that is not designed for modeling activities or constraints. VSL is a value specification language that can only express simple values and expressions. XMI and XML are markup languages that are used for exchanging models between tools, not for specifying constraints on models. References: OMG-Certified Systems Modeling Professional - Model Builder ?Advanced (OCUP2-ADV) Examination Guide Version 1.0, Section 4.3

• Question 90:

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  Modehca solvers can produce large volumes of time-based results (such as time-based power usage), but requirements are often based on scalar values such as "maximum peak power" and 'average power usage".

  Which of the following is generally the most effective way to verify such requirements?

  A. Import the Modelica time-based power usage results into SysML Then use SysML parametncs to calculate these scalar values, and compare them to the requirements

  B. ave the Modelica solver also compute these scalar values from its time-based power usage results Then import the resulting scalar values into SysML. and compare them to the requirements.

  C. Use the SysML4Modelica profile to transform the Modelica time-based power usage results into these scalar values Then import the resulting scalar values into SysML, and compare them to the requirements.

  D. Modelica models can only produce time-based results and thus cannot support scalar results like these, which must either be calculated using a different tool or measured on physical prototypes Then enter the resulting scalar values into SysML, and compare them to the requirements

  Correct Answer: B

  The most effective way to verify such requirements is to have the Modelica solver also compute these scalar values from its time-based power usage results. Then import the resulting scalar values into SysML, and compare them to the requirements. This way, the verification can be done at the same level of abstraction as the requirements, and avoid unnecessary transformations or calculations in SysML. Modelica solvers can provide various functions and operators to compute scalar values from time-based results, such as max, min, mean, integral, etc.