Quiz on Sequence Diagrams and UML Diagrams

What does a sequence diagram describe?

• The direct consequences of an action of at least one object

• The behavior of a system from different perspectives

• The interactions between objects to fulfill a specific task

• The structure of objects in a system

What is the purpose of a synchronous message in a sequence diagram?

• Sender waits for a response message

• Sender continues without waiting for a response message

• Sender waits for a specific duration before continuing

• Sender sends a message to an unknown receiver

What is the notation for an object creation event in a sequence diagram?

• A continuous bar to visualize execution

• A dashed arrow pointing to the head of the lifeline

• A rectangle containing roleName:Class

• A large cross (×) at the end of the lifeline

What is the purpose of a loop fragment in a sequence diagram?

• To model an optional sequence

• To model repeated interactions

• To model exception interactions

• To model alternative sequences

What does the alt fragment represent in a sequence diagram?

• A negative interaction

• A critical region

• An irrelevant interaction

• An alternative sequence

What is the purpose of a response message in a sequence diagram?

• To assign a return value to a variable

• To express that time elapses between sending and receipt of a message

• To model interactions between multiple objects

• To specify how messages and data are exchanged

What is the notation for a time-consuming message in a sequence diagram?

• msg(par1,par2):val

• att = msg(par1,par2):val

• msg(par1,par2)

• att = msg(par1,par2)

What is the concept of the weak sequencing in a sequence diagram?

• Events on different lifelines are executed simultaneously

• Events on the same lifeline are executed in a strict order

• Events on the same lifeline from different operands are ordered randomly

• Events on different lifelines from different operands may come in any order

What is the purpose of a break fragment in a sequence diagram?

• To model repeated interactions

• To model concurrent interactions

• To model exception interactions

• To model irrelevant interactions

What is the notation for a found message in a sequence diagram?

• att = msg(par1,par2):val

• att = msg(par1,par2)

• msg(par1,par2):val

• msg(par1,par2)