Assume Two Threads Share a BankAccount Object with Balance of Zero

question 60

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. 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? public void deposit(int dollars)
{
MyLock.lock()
Int newBalance = balance + dollars;
System.out.println("depositing") ;
Balance = newBalance;
MyLock.unlock()
}
Public void withdraw(int dollars)
{
MyLock.lock()
Int newBalance = balance - dollars;
System.out.println("withdrawing") ;
Balance = newBalance;
MyLock.unlock()
}

• 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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Definitions:

Quantum Meruit

A legal principle where a person can recover the reasonable value of services provided, but not contracted for.

Providing Services

The act of performing work or duties for a client or customer, usually in exchange for payment.

Basic Precepts

Fundamental principles or beliefs that serve as the foundation for a system, theory, or organization.

Contract Law

The body of law governing the formation, execution, and enforcement of contracts between parties.