Final answer:
The statement 'final boolean flag = (refCount == 0);' is a valid Java programming code line that checks if 'refCount' equals zero and assigns the result to 'flag', and thus, it compiles correctly, making the answer (a) True.
Step-by-step explanation:
The line of code you're asking about appears to be from a programming context, specifically Java. The line final boolean flag = (refCount == 0); is checking if refCount is equal to zero and assigning the result of that comparison to a final (immutable) boolean variable named flag. This is a valid Java statement assuming that refCount is a previously declared variable of a numeric data type, since numeric data types can be compared with integers using the == operator. Therefore, the statement will compile, so the answer is (a) True.