Behavioral Design Patterns in C++ - Basic Implementation-Observer
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Information Technology (IT), Architecture
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University
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Practice Problem
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Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary role of the observer class in the observer design pattern?
To provide a pure virtual function for updates
To manage the state of the subject
To notify all observers of changes
To implement the main application logic
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which function is NOT typically part of the subject class in the observer pattern?
Execute
Attach
Detach
Notify
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the concrete subject class primarily manage?
The user interface
The main application logic
The state of interest to observers
The list of observers
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does the concrete observer respond to notifications from the subject?
By printing a message
By changing its own state
By sending a notification back
By detaching from the subject
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a key characteristic of the relationship between the concrete subject and observers?
Observers must return a result to the subject
They are tightly coupled
The subject knows the exact number of observers
They are loosely coupled
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