Which UML diagram is used to model the static structure of a system from a deployment perspective, showing nodes and their relationships?

Question $15$Answer

a$.$

Class diagram

b$.$

Object diagram

c$.$

Deployment diagram

d$.$

Package diagram

Question $16$

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What does a transition in a state diagram represent?

Question $16$Answer

a$.$

A method call between objects

b$.$

A relationship between classes

c$.$

A message exchange between actors

d$.$

A change in the internal state of an object

Question $17$

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In a state diagram, what does a filled circle with an arrow pointing to a state represent?

Question $17$Answer

a$.$

A final state

b$.$

An initial state

c$.$

A transition

d$.$

A decision point

Question $18$

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Which of the following statements about classes and objects is correct?

Question $18$Answer

a$.$

Classes are instances of objects.

b$.$

Classes are defined by objects.

c$.$

Objects are defined by classes.

d$.$

Objects are instances of classes.