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Questions and Answers
What is the behavior of a static member variable when the first object of its class is created?
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 (correct)
- It is initialized to a random value
- It is initialized to the value of the first object's member variable
- It remains uninitialized until the first object uses it
How many copies of a static member variable are created for the entire class?
How many copies of a static member variable are created for the entire class?
- Two copies, one for each class and one shared among objects
- Depends on the number of objects created
- Only one copy shared by all objects of the class (correct)
- One copy for each object of the class
Where is a static member variable visible?
Where is a static member variable visible?
- It depends on how it is declared
- Only outside the class
- Within and outside the class
- Only within the class (correct)
What is a common use of static variables in a class?
What is a common use of static variables in a class?
What happens if a static member variable is initialized more than once in a C++ program?
What happens if a static member variable is initialized more than once in a C++ program?
In C++, when can a static member variable be accessed directly using the class name?
In C++, when can a static member variable be accessed directly using the class name?
What is the behavior of a static member variable when the first object of its class is created?
What is the behavior of a static member variable when the first object of its class is created?
In C++, where is a static member variable visible?
In C++, where is a static member variable visible?
What happens if a static member variable is initialized more than once in a C++ program?
What happens if a static member variable is initialized more than once in a C++ program?
What is a common use of static variables in a class?
What is a common use of static variables in a class?
When can a static member variable be accessed directly using the class name in C++?
When can a static member variable be accessed directly using the class name in C++?
How many copies of a static member variable are created for the entire class in C++?
How many copies of a static member variable are created for the entire class in C++?
In C++, what is the lifetime of a static member variable?
In C++, what is the lifetime of a static member variable?
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.
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Description
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.
