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Questions and Answers
What is a characteristic of dynamic allocated objects?
What happens when a dynamic allocated object is no longer needed?
What is the purpose of the delete operator in dynamic memory allocation?
What is a consequence of not deleting dynamic allocated objects?
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What is a key difference between dynamic allocated objects and automatic objects?
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Where is a value stored when it is assigned to a static member variable?
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What is the primary purpose of a static member variable?
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When a value is assigned to a static member variable, how many instances are affected?
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What is a key difference between static member variables and non-static member variables?
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What happens to the value of a static member variable when a new instance of the class is created?
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Study Notes
Memory Management on the Stack
- Allocating and deallocating memory on the stack is fast due to the movement of the stack pointer up and down to allocate and deallocate space.
Dynamic Memory Allocation
- Dynamic allocated arrays can have their size changed by deallocating memory using delete[] and allocating a new block with a different size if desired.
Dynamic Allocated Objects
- Dynamic allocated objects cannot be deleted automatically and require explicit deletion using the delete operator.
Static Members
- A static member function can be called without any instances of the class being defined.
- Static members can be invoked using the class name, for example:
ClassName::staticVariableNameandClassName::staticFunctionName().
Static Member Variables
- When a member variable is declared with the keyword
static, there is only one copy of the member variable in memory. - The static member variable is shared by all instances of the class.
- All instances of the class have access to the static member variable.
- A value stored in a static member variable is not stored in an instance of the class.
- There is only one copy of the static member variable regardless of the number of instances of the class that exist.
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Description
This quiz covers the basics of allocating and deallocating memory on the stack, including how the stack pointer moves to manage space. Test your understanding of this essential concept in computer science.
