Assume Two Threads Share a BankAccount Object with Balance of Zero

question 74

Multiple Choice

Assume two threads share a BankAccount object with balance of zero (0) , and that the BankAccount class provides deposit and withdraw methods as shown below. Thread one deposits $10 ten times and, concurrently, thread two withdraws $10 ten times. If the balance after all thread calls is 0, which statement is definitely true? public void deposit(int dollars)
{
Int newBalance = balance + dollars;
System.out.println("depositing") ;
Balance = newBalance;
}
Public void withdraw(int dollars)
{
Int newBalance = balance - dollars;
System.out.println("withdrawing") ;
Balance = newBalance;
}

• A) The calls were interleaved: thread one, thread two, thread one, thread two, …
• B) The first call was to the deposit method.
• C) The last call was to the withdraw method.
• D) Each individual call to the deposit and withdraw methods ran to completion.

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Definitions:

Own Price Elasticity

A measure of the responsiveness of the quantity demanded of a good to a change in its own price.

Specific Tax

A tax that is levied as a fixed amount per unit of a good or service, rather than as a percentage of the price.

Price Elasticity

Measures the responsiveness of the quantity demanded of a good to a change in its price.

Consumer Surplus

The difference between the total amount that consumers are willing and able to pay for a good or service and the total amount they actually do pay.