Which of the following control methods is effective in reducing the risk of purchasing-scheme fraud?
1. Periodically reviewing the vendor list for unusual vendors and addresses.
2. Segregating duties for amount purchasing, receiving, shipping, and accounting.
3. Validating sequential integrity of purchase orders.
4. Verifying the validity of invoices with post office box addresses.

Which of the following options is the most cost-effective and efficient way for internal auditors to keep current with the latest developments in the internal audit profession?

An internal auditor is reviewing the accounts receivable when she discovers account balances more than three years old. The auditor was previously supervising the area during this time, and she subsequently advises the chief audit executive (CAE) of a potential conflict.
Which of the following is the most appropriate course of action for the CAE to take?

According to IIA guidance, which of the following statements is true regarding periodic internal assessments of the internal audit activity?

An internal auditor for a large retail chain suspects that a store manager has been stealing money from cash sales by listing the sales as accounts receivable and then writing off the accounts as bad debts. Which of the following irregularities is the most likely cause of the auditor's suspicion?