Discuss OMG OMG-OCUP2-FOUND100 Exam Topic 2 Question 39

Choose the correct answer:

In UML modeling, what is a Constraint?

Aa condition that must be satisfied when it is evaluated

Ba condition that should be met depending on system operation

Ca condition that causes the state of the objects to change over time

Da condition that constrains what can or cannot be put in a class diagram

Suggested Answer: A

In UML modeling, a constraint is defined as:

A . a condition that must be satisfied when it is evaluated

A constraint is a semantic condition or restriction expressed in natural language text or a machine-readable language for expressing constraints, such as OCL (Object Constraint Language). Constraints specify invariants that must hold for the system being modeled at all times. This means that whenever the constraint is evaluated, the condition it expresses must be satisfied (UML 2.5 specification, section 7.9).

The other options do not accurately define what a constraint is in the context of UML:

B . A condition that should be met depending on system operation -- This is not precise as constraints are not optional and do not depend on system operation; they are always applicable.

C . A condition that causes the state of the objects to change over time -- This describes a side effect, which is not the purpose of a constraint. A constraint is a condition that must always be met, not something that induces change.

D . A condition that constrains what can or cannot be put in a class diagram -- This is too broad and imprecise. Constraints apply to elements within the class diagram and are not about the content of the diagram itself.

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31 comments · newest first

Diane 6 months ago

I’m with A. Conditions must be evaluated correctly.

Madelyn 6 months ago

D makes sense too. It limits class diagram elements.

Albina 6 months ago

A is clear. Constraints need to be satisfied.

Emeline 6 months ago

B seems right. It relates to system behavior.

Giovanna 7 months ago

I lean towards D. It fits class diagrams well.

Roxane 7 months ago

I think it's A. It sounds precise.

Jacinta 7 months ago

Not sure about this one, seems a bit vague to me.

Lashunda 8 months ago

Wait, are we sure it's not about changing object states?

Tarra 8 months ago

I'm leaning towards option A too, sounds right!

Hailey 8 months ago

I think it's more about what can or cannot be in a class diagram.

Lynelle 8 months ago

Constraints? More like brain teasers if you ask me.

Regenia 8 months ago

C) a condition that causes the state of the objects to change over time

Dick 8 months ago

B) a condition that should be met depending on system operation

Dwight 9 months ago

This question is a real constraint on my brain!

Nichelle 9 months ago

I’m not entirely sure, but I feel like constraints are related to how objects change states, so maybe C could be right?

Caren 9 months ago

I remember practicing a question about constraints in class, and I think it was about conditions that should be met, which might be B?

Mirta 9 months ago

I'm a little unsure on this one. Is a constraint just something that affects the system, or does it have to be a mandatory condition? I'm leaning towards A but I'm not 100% confident.

Corazon 9 months ago

I remember learning about constraints in UML. I'm pretty sure they're conditions that have to be met, not just optional ones. I'll select A.

Chandra 9 months ago

Okay, let me think this through. A constraint is a rule or limitation on the model, so I'm guessing it has to be a required condition, not just a suggested one. I'll go with A.

Mendy 10 months ago

A constraint is definitely a condition that must be satisfied!

Filiberto 10 months ago

A) a condition that must be satisfied when it is evaluated

Lemuel 10 months ago

I think a constraint is something that has to be satisfied when evaluated, so I’m leaning towards A.

Ozell 10 months ago

I recall that constraints limit what can be included in a class diagram, which makes me think D is the answer.

Lorrine 10 months ago

D) a condition that constrains what can or cannot be put in a class diagram

Melvin 11 months ago

Hmm, I'm a bit confused. Is a constraint just a condition that affects the system, or does it have to be a required condition? I'm not totally sure.

Selene 11 months ago

I think I know this one - a constraint in UML is a condition that must be satisfied, so I'll go with A.

Alecia 5 months ago

↳ replying to Selene

I’m with A as well, it’s clear and straightforward.

Polly 5 months ago

↳ replying to Selene

A is definitely the most accurate.

Alexia 5 months ago

↳ replying to Selene

I think B is a good choice, it fits the context.

Alba 6 months ago

↳ replying to Selene

I was leaning towards D, but A makes sense too.

Kristal 6 months ago

↳ replying to Selene

I agree, A sounds right.

OMG-OCUP2-FOUND100 Exam - Topic 2 Question 39 Discussion