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Created January 9, 2019 02:14
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Questions about pointers from cassido's 1/7/19 newsletter
Raw
pointers.txt
- What is the difference between passing by value and passing by reference?
By value: Passes the value of the memory address that the pointer points to.
By reference: Passes an alias to “reference” the variable passed in.
- How can pointers be used with inherited or abstract classes?
Using static methods.
- What does it mean for a pointer to be null?
The pointer does not point to any address in memory.
- What happens when you use the dereference operator (&) on a null pointer?
NullPointerException.
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