13 Questions
What is the behavior of a static member variable when the first object of its class is created?
It is initialized to zero and no other initialization is permitted
How many copies of a static member variable are created for the entire class?
Only one copy shared by all objects of the class
Where is a static member variable visible?
Only within the class
What is a common use of static variables in a class?
To maintain values common to the entire class
What happens if a static member variable is initialized more than once in a C++ program?
It results in a compiler error
In C++, when can a static member variable be accessed directly using the class name?
At any point in the program
What is the behavior of a static member variable when the first object of its class is created?
It is initialized to zero when the first object is created and cannot be re-initialized
In C++, where is a static member variable visible?
Within the class where it is declared
What happens if a static member variable is initialized more than once in a C++ program?
It throws a compilation error
What is a common use of static variables in a class?
To maintain values common to the entire program
When can a static member variable be accessed directly using the class name in C++?
At any point in the program after an object of the class has been created
How many copies of a static member variable are created for the entire class in C++?
One, shared by all objects of the class
In C++, what is the lifetime of a static member variable?
It exists until the program terminates
Study Notes
Static Member Variables
- When the first object of its class is created, a static member variable is initialized only once.
- Only one copy of a static member variable is created for the entire class, and it is shared by all objects of the class.
- A static member variable is visible throughout the entire program, and it can be accessed directly using the class name.
- A common use of static variables in a class is to share data among all objects of the class.
- If a static member variable is initialized more than once in a C++ program, the compiler will throw an error.
- A static member variable can be accessed directly using the class name, without the need for an object instance.
- The lifetime of a static member variable is the entire duration of the program, from the start to the end.
Test your knowledge on static members, interfaces, exception handling, and stream classes in C++ programming with this quiz prepared by Sumit Purohit, Assistant Professor at Aishwarya College.
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