Assume Two Threads Share a BankAccount Object with Balance of Zero

question 15

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?

• 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:

Predetermined

Established in advance or determined beforehand.

Lump-Sum Amounts

Single payments made for a group of items or services rather than individual transactions.

Fixed Costs

Expenses that do not change with the level of production or sales, such as rent and salaries.

Variable Costs

Expenses that fluctuate directly with changes in production or service levels.