Assume Two Threads Share a BankAccount Object with Balance of Zero

question 46

Multiple Choice

Assume two threads share a BankAccount object with balance of zero (0) , and that the BankAccount class provides deposit and withdraw methods and has a ReentrantLock named myLock, as shown below.Note that only the deposit method uses the lock.Thread one deposits $10 ten times and, concurrently, thread two withdraws $10 ten times.Which statement regarding the balance after all thread calls is definitely true?

• A)The balance could be zero or positive.
• B)The balance is zero.
• C)The balance could be zero or negative.
• D)The balance is positive.

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