200-901 Question #254: Real Exam Question with Answer & Explanation

The correct answer is B: All the calls are asynchronous.. A synchronous message is denoted by the solid arrowhead. An asynchronous message is denoted by line arrowhead. There might be also the asynchronous return message which is denoted by the dashed line (not in a diagram here). Here all the messages are denoted by line arrowhead so t

Software Development and Design

Question

Refer to the exhibit. What do all the calls shown in the sequence diagram have in common?

Options

AAll the calls are optional.
BAll the calls are asynchronous.
CAll the calls are synchronous.
DAll the calls depend on the catalog.

Explanation

A synchronous message is denoted by the solid arrowhead. An asynchronous message is denoted by line arrowhead. There might be also the asynchronous return message which is denoted by the dashed line (not in a diagram here). Here all the messages are denoted by line arrowhead so that means all the messages are

Topics

#Asynchronous communication#Sequence diagrams#API design patterns#Communication models

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