Free SYSML MODEL BUILDER INTERMEDIATE EXAM Practice Questions

Sample Practice Questions

Try these 10 sample questions from the SYSML MODEL BUILDER INTERMEDIATE EXAM practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1A SysML input pin receives a sensor token that its action refuses. The model must discard that token rather than retain it for later use. Which stereotype specifies this behavior?

   1. A.«overwrite»
   2. B.«nobuffer»Correct answer: B
   3. C.«optional»
   4. D.«continuous»

   Explanation: SysML states, “tokens arriving at the node are discarded if they are refused by outgoing edges”. B applies this refusal rule. A replaces stored tokens when a node is full; C changes parameter lower multiplicity; D describes flow rate, not refusal handling.

   Reference: OMG Systems Modeling Language Specification — §11.3.2.4 NoBuffer, printed p.91

2. 2A multivalued block property must preserve value order and permit repeated equal values. Which setting expresses those two requirements?

   1. A.isOrdered=false, isUnique=true
   2. B.isOrdered=true, isUnique=falseCorrect answer: B
   3. C.isOrdered=true, isUnique=true
   4. D.isOrdered=false, isUnique=false

   Explanation: isOrdered specifies whether values are “sequentially ordered”; isUnique specifies whether they are “unique”. B preserves order without requiring uniqueness. A reverses both requirements; C forbids repeats; D does not preserve order.

   Reference: OMG UML Superstructure Specification — §7.3.32 MultiplicityElement, isOrdered, printed p.96

3. 3A reusable constraint definition is applied twice to different properties in one system model. Which element represents each localized usage of that definition?

   1. A.A constraint property typed by the constraint blockCorrect answer: A
   2. B.The reusable constraint-block definition itself
   3. C.A constraint parameter declared inside the definition
   4. D.A binding connector joining two parameters

   Explanation: The specification states, “A constraint property is a property of any block that is typed by a constraint block.” A represents each localized usage. B is the reusable type, C is a variable of that type, and D is an equality relationship connecting properties, rather than a localized usage of the whole definition.

   Reference: OMG Systems Modeling Language Specification — §10.3.2.2 ConstraintProperty, printed p.73

4. 4A design element implements a requirement, while a test case determines whether it is fulfilled. Which pair of SysML relations expresses these distinct roles?

   1. A.Design→requirement: verify; test→requirement: satisfy
   2. B.Design→requirement: copy; test→requirement: deriveReqt
   3. C.Design→requirement: satisfy; test→requirement: verifyCorrect answer: C
   4. D.Design→requirement: deriveReqt; test→requirement: copy

   Explanation: Satisfy relates a requirement to “a model element that fulfills the requirement”; Verify relates it to a test or other element that determines fulfillment. C keeps design fulfillment and verification distinct. A swaps them; B and D substitute requirement-copy/derivation relations for those roles.

   Reference: OMG Systems Modeling Language Specification — §16.3.2.6 Satisfy, printed p.135

5. 5A SysML diagram element carries a rake symbol linking to a more elaborated diagram. What should a reviewer conclude from the rake alone?

   1. A.It necessarily asserts formal structural part-whole composition
   2. B.It necessarily asserts a call to a reusable behavior
   3. C.It provides an elaboration reference, not necessarily formal decompositionCorrect answer: C
   4. D.It necessarily asserts derivation of a lower-level requirement

   Explanation: The guideline says this “does not always mean decomposition in a formal sense”. C preserves the general elaboration-reference meaning. A imposes structural composition, B imposes a behavior-call relationship, and D imposes requirement derivation; the rake alone does not establish any of those specific semantics.

   Reference: OMG Systems Modeling Language Specification — §A.2 Guidelines, rake notation, printed p.159

6. 6A namespace imports a public model element under a local alias. Does the ElementImport create a copied element to which independent features can be added?

   1. A.Yes; the alias denotes a new owned classifier
   2. B.No; the import works by reference to the original elementCorrect answer: B
   3. C.Yes; the imported element becomes a new profile
   4. D.No; aliases are prohibited for element imports

   Explanation: ElementImport “works by reference”, so B preserves the original element. A and C invent a copied owned definition; D contradicts the explicitly supported alias attribute. An alias changes the local reference name, not the element's identity.

   Reference: OMG UML Superstructure Specification — §7.3.15 ElementImport, Semantics, printed p.67

7. 7A profile author defines a stereotype to extend the modeling language. What does that stereotype extend before it is applied to user-model elements?

   1. A.A class defined in the user model
   2. B.An instance specification in the user model
   3. C.A physical system object at runtime
   4. D.A metaclassCorrect answer: D

   Explanation: The overview states, “Stereotypes are defined by extending a metaclass”. D is the language-level target. A is a user-model classifier, B a model description of an instance, and C a runtime system object. Those levels can be described by model elements, but are not the metaclass extended when defining the stereotype.

   Reference: OMG Systems Modeling Language Specification — §17.1 Profiles and Model Libraries overview, printed p.141

8. 8A full SysML object node has FIFO ordering and «overwrite». It currently holds tokens entered as P, then Q, then R. One new token arrives with incoming-edge weight 1. Which existing token is replaced?

   1. A.P, the earliest added token
   2. B.Q, the middle token
   3. C.R, the most recently added tokenCorrect answer: C
   4. D.P, Q and R together

   Explanation: The rule says, “For FIFO ordering, this is the most recently added token”. Therefore C replaces R, the last token that FIFO would select. A confuses removal order with overwrite replacement; B uses no specified ordering rule; D ignores the incoming-edge weight of 1.

   Reference: OMG Systems Modeling Language Specification — §11.3.2.5 Overwrite, printed p.92

9. 9What restriction does isReadOnly=true impose on a block property's value?

   1. A.The value may be read and written
   2. B.The value may be written but not read
   3. C.The value may be read but not writtenCorrect answer: C
   4. D.The value may be neither read nor written

   Explanation: The attribute “may only be read, and not written”. C states that restriction directly. A permits a forbidden write; B reverses the read/write permissions; D wrongly prohibits reading as well.

   Reference: OMG UML Superstructure Specification — §7.3.44 Property, isReadOnly, printed p.126

10. 10A binding connector links a constraint parameter to a system value property. What relation does that connector specify?

    1. A.The parameter is evaluated before the property
    2. B.The property transfers ownership to the constraint block
    3. C.The properties at the two ends have equal valuesCorrect answer: C
    4. D.The two values must change in opposite directions

    Explanation: A Binding Connector specifies that its end properties “have equal values”. C is an equality relation. A invents evaluation order, B ownership transfer, and D an inverse relation not expressed by binding.

    Reference: OMG Systems Modeling Language Specification — §8.3.2.1 Binding Connector, printed p.42