What happens when a reference is declared but not initialized in C++?
A. Undefined behavior
B. Default-initialized to null
C. Initialized to a default value
D. Compilation error
Answer: Option D
A. Undefined behavior
B. Default-initialized to null
C. Initialized to a default value
D. Compilation error
Answer: Option D
A. A variable that stores the size of another variable
B. A variable that stores the address of another variable
C. A variable that stores a reference to another variable
D. None of the above
What is the output of the following code: int x = 5; int *ptr = &x; cout << *ptr; in C++?
A. Address of x
B. Garbage value
C. Compilation error
D. 5
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