Behavioral Design Patterns in C++ - Template Method - I

The video tutorial explains the implementation of the template method design pattern in a document framework. It covers modifying the document class, implementing save and load algorithms, and making certain methods customizable. The tutorial emphasizes the importance of using public methods to access class states and provides a step-by-step guide to implementing the save and load functions, including handling file dialogs and versioning. The video concludes with finalizing the document base class and preparing for the next video on implementing a text document.

What is the primary purpose of the template method design pattern?

• To allow subclasses to redefine certain steps of an algorithm without changing its structure.

• To provide a way to create objects without specifying the exact class of object that will be created.

• To define a family of algorithms, encapsulate each one, and make them interchangeable.

• To ensure a class has only one instance and provide a global point of access to it.

In the save algorithm, what is the first step?

• Display the file dialog to the user.

• Set the modified state to false.

• Check if the file is already saved.

• Write the version information.

Which steps in the save algorithm are customizable by subclasses?

• Steps two and five

• Steps three and six

• Steps four and five

• Steps one and two

What is the first step in the load algorithm?

• Check if the file is modified.

• Open the Filestream for reading.

• Display the file dialog box.

• Read the version information.

Which steps in the load algorithm are customizable?

• Steps three and four

• Steps one and two

• Steps five and six

• Steps two and five

Why is the file dialog function made private?

• To ensure it can be used in multiple projects.

• To make it accessible to all classes.

• To allow subclasses to override it.

• To prevent users from accessing it directly.

What is the purpose of the setmodified function?

• To reset the file to its original state.

• To update the modified state when data changes.

• To load the file without user input.

• To save the file automatically.