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:

Motor Neurons

Motor neurons are nerve cells responsible for conveying signals from the brain and spinal cord to muscles, instructing them to contract and thus enabling movement.

Nerve Impulses

The electrical signals that pass along the nerve fibers, facilitating communication between neurons or between neurons and muscles.

Muscle Cells

Muscle cells are specialized cells capable of contracting and relaxing, facilitating movement and various bodily functions.

Amyotrophic Lateral Sclerosis

A progressive neurodegenerative disease affecting nerve cells in the brain and spinal cord, leading to loss of muscle control.