Complete Modern C++ - Project - Part IX (RTTI Basics)

The video tutorial covers the implementation of a minimum balance feature in a checking account class, emphasizing the importance of setting and querying this value externally. It discusses the challenges of downcasting pointers and the dependencies it creates, highlighting design concerns. The tutorial introduces the concept of Run-Time Type Identification (RTI) in C++, explaining how to use the type ID operator to determine the type of objects at runtime, especially in polymorphic scenarios. The video concludes with practical examples of using type ID for decision-making based on object types.

What is the purpose of adding a member variable for minimum balance in the checking account class?

• To hardcode the balance value

• To allow setting and querying the balance from outside

• To make the class more complex

• To avoid using constructors

Why is it not advisable to downcast an account pointer blindly?

• It always works without issues

• It can lead to incorrect results or crashes

• It simplifies the code

• It is the only way to access child class functions

What does the type ID operator return?

• The value of the object

• The memory address of the object

• The type information as an object of type info class

• The size of the object

When does the type ID operator work at runtime?

• When used on integer types

• When used on polymorphic types

• When used on static types

• When used on non-polymorphic types

What is the benefit of using the name function in the type info class?

• To increase the object's size

• To delete the object

• To print a human-readable name of the type

• To change the type of the object

How can you determine if a pointer is pointing to a specific type of object?

• By using the type ID operator with comparison

• By using the delete operator

• By using the sizeof operator

• By using the new operator

What is a key difference between compile-time and runtime type identification?

• Compile-time is faster than runtime

• Runtime type identification works only on polymorphic types

• Compile-time type identification is more accurate

• Runtime type identification is used for non-polymorphic types