Free OCUP Practice Questions

Question 1

During order fulfillment, a fork starts ReserveStock and AuthorizePayment concurrently. Each action produces one control token when it completes. Their outgoing control flows enter a merge node, whose outgoing flow leads to DispatchOrder. DispatchOrder can therefore start after only one check finishes. Both checks must finish before dispatch. Which local change fixes the synchronization defect?

Accepted Answer

Replace the merge with a join that requires a token from each check.

Answer

Keep the merge and place both checks in the same activity partition.

Answer

Keep the merge and give each incoming control flow a weight of 2.

Answer

Keep the merge and guard each incoming flow with that check's completion flag.

Question 2

The Streaming state has entry behavior openConnection(), doActivity transferChunks(), and exit behavior closeConnection(). A valid heartbeat must refresh lastSeen without interrupting the transfer or reopening the connection. The model currently uses an external self-transition labeled heartbeat / refreshLastSeen(). What should replace this transition?

Accepted Answer

An internal transition triggered by heartbeat, with effect refreshLastSeen().

Answer

A transition through Reconnecting that closes, reopens, and then resumes Streaming.

Answer

A deferred heartbeat handled only after transferChunks() has completed.

Answer

A heartbeat-triggered self-transition with refreshLastSeen() moved to Streaming's entry behavior.

Question 3

A replacement BillingEngine fulfills the installed component's IBilling contract but uses different internal classes. Both components require IAudit; the replacement additionally requires ICurrencyRates. The deployment provides IAudit but has no provider of ICurrencyRates. Which review finding follows from these declarations?

Accepted Answer

The replacement cannot satisfy its declared dependencies until an ICurrencyRates provider is connected.

Answer

The unchanged IBilling contract is sufficient for substitution in the existing deployment.

Answer

The different internal classes prevent substitution even after all required services are connected.

Answer

ICurrencyRates must become a provided interface because replacements cannot add required interfaces.

Question 4

An interaction constrains server processing time to at most 40 ms, measured from the server's receipt of a request to its transmission of the reply. A trace uses one synchronized clock: the client sends at 100 ms, the server receives at 112 ms, the server replies at 145 ms, and the client receives at 173 ms. A reviewer reports 73 ms and rejects the trace. What should the review record instead?

Accepted Answer

33 ms; the constrained processing interval satisfies the requirement.

Answer

61 ms; server processing exceeds the permitted duration.

Answer

73 ms; the constraint measures the complete client round trip.

Answer

12 ms; the constraint measures the incoming request's transmission.

Question 5

An alt combined fragment offers expedited delivery under [priorityCustomer] and standard delivery under [orderTotal < 200]. For a priority customer's order totaling 120, both guards are true. No additional selection rule is specified. How does UML interpret the alternatives in this execution?

Accepted Answer

One eligible operand is chosen, with no specified priority between them.

Answer

The upper operand wins because guards are evaluated from top to bottom.

Answer

Both operands execute, each contributing its messages to the interaction.

Answer

The interaction must be rejected because the true guards overlap.

Question 6

Gateway contains the parts router:Router and audit:AuditService. Gateway's boundary port (isBehavior=false) provides IRoute and forwards incoming requests to router's port, which also provides IRoute. A second connector links router's required IAudit interface to audit's compatible provided IAudit interface. Classify the boundary-to-router connector and the router-to-audit connector, in that order.

Accepted Answer

Delegation; assembly.

Answer

Assembly; delegation.

Answer

Delegation; delegation.

Answer

Assembly; assembly.

Question 7

A controller remains in Monitoring while its continuous doActivity runs. Its temperature value changes from 72 to 86. An outgoing transition is labeled sample() [temperature > 80] / activateCooling(), but no sample() call occurs. Cooling is required when the condition becomes true, without waiting for a call or for the doActivity to finish. What is the appropriate event-model correction?

Accepted Answer

Use a ChangeEvent whose expression is temperature > 80 as the trigger.

Answer

Retain the CallEvent and treat the true guard as an occurrence of sample().

Answer

Move temperature > 80 into the postcondition of the sample() operation.

Answer

Replace the call-triggered transition with a completion transition using the same guard.

Question 8

An itinerary holds zero to eight Stop references in visit order. Revisiting the same Stop object is permitted, so [A, B, A, C] is a legitimate route. The current property has multiplicity 0..8, isOrdered=true, and isUnique=true. Which correction expresses the requirement while preserving the identities and order of the referenced Stops?

Accepted Answer

Set isUnique=false and retain the multiplicity and ordering setting.

Answer

Change the multiplicity to 0..* and retain both Boolean settings.

Answer

Set isOrdered=false and retain the multiplicity and uniqueness setting.

Answer

Keep the property unchanged and replace repeated Stops with new object copies.

Question 9

A robotic-cell activity executes MoveArm and FeedPart concurrently inside an interruptible activity region. AuditAlarm remains active outside the region. An enabled AcceptEventAction inside the region accepts EmergencyStop. The model must cancel all work in the region, keep AuditAlarm running, and start EngageBrake outside the region but in the same activity. How should the accepted-event token leave the region?

Accepted Answer

Traverse an interrupting edge from the AcceptEventAction directly to EngageBrake.

Answer

Follow a control flow to an activity final node to terminate the emergency work.

Answer

Enter a flow final node within the region to cancel its active actions.

Answer

Traverse an ordinary control flow from the AcceptEventAction directly to EngageBrake.

Question 10

Resource has two independent generalization sets. The set {Physical, Virtual} is {complete, disjoint}; the set {Metered, Shared} is {incomplete, overlapping}. All four named classifiers specialize Resource, and no other constraints apply. Which interpretation correctly respects the scope of the two sets?

Accepted Answer

A Physical resource may also be both Metered and Shared.

Answer

A resource may be both Physical and Virtual provided it is Shared.

Answer

A resource classified only as Physical violates the second set.

Answer

A resource classified only as Metered satisfies the first set.

Free OCUP Practice Questions

Domain 1: Activities & Actions 20% of exam

Question 1

Question 2

Domain 2: Basic Structure 16% of exam

Question 3

Question 4

Domain 3: Interactions 14% of exam

Question 5

Domain 4: StateMachines & Use Cases 13% of exam

Question 6

Domain 5: Components 12% of exam

Question 7

Domain 6: Common Behavior 10% of exam

Question 8

Domain 7: Structured Classifiers 9% of exam

Question 9

Domain 8: Classification 6% of exam

Question 10

That's 10 of 1,030