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Authentication is a key security control that prevents unauthorized users from accessing a smart device’s data or applications. It ensures that only authorized individuals can use the device, reducing risks such as data breaches, identity theft, and cyberattacks.

(A) Anti-malware software.

Incorrect. Anti-malware software protects against malicious programs, but it does not control user access to a device.

(B) Authentication. ✅

Correct. Authentication mechanisms (such as passwords, biometrics, PINs, and two-factor authentication) prevent unauthorized access to a device’s data and applications.

IIA GTAG "Managing and Auditing IT Vulnerabilities" highlights authentication as a primary control for protecting smart devices.

(C) Spyware.

Incorrect. Spyware is a security threat, not a preventive control. It is a type of malicious software that steals data from a device.

(D) Rooting.

Incorrect. Rooting (on Android) or jailbreaking (on iOS) refers to modifying a device to remove security restrictions, which increases security risks rather than preventing unauthorized access.

IIA GTAG – "Managing and Auditing IT Vulnerabilities"

IIA Standard 2120 – Risk Management

NIST Cybersecurity Framework – Identity and Access Management

Analysis of Answer Choices:IIA References:Thus, the correct answer is B, as authentication is the most effective security control for preventing unauthorized access to smart devices.

The acid-test (quick) ratio is a more dependable liquidity indicator than working capital because it excludes inventory, which may not be easily converted to cash in the short term. This ratio measures a company’s ability to pay its short-term liabilities using only its most liquid assets (cash, marketable securities, and accounts receivable).

Formula for the Acid-Test Ratio:Acid-Test Ratio=Current Assets−InventoryCurrent Liabilities\text{Acid-Test Ratio} = \frac{\text{Current Assets} - \text{Inventory}}{\text{Current Liabilities}}Acid-Test Ratio=Current LiabilitiesCurrent Assets−Inventory​

This ratio is more reliable than working capital since it removes inventory, which may be difficult to liquidate quickly in financial distress.

A. Acid-test (quick) ratio (Correct Answer) – This provides a stronger measure of liquidity because it excludes inventory, which might not be quickly converted to cash.

B. Average collection period – This measures the efficiency of accounts receivable collections, but it does not directly measure overall liquidity.

C. Current ratio – While this ratio is commonly used, it includes inventory, which can distort liquidity assessments if inventory is not easily sold.

D. Inventory turnover – This measures how quickly inventory is sold, but it does not directly assess liquidity.

IIA IPPF Standard 2130 – Control emphasizes liquidity monitoring as a key financial control.

COSO ERM Framework – Financial Performance Measures discusses acid-test ratio as a critical liquidity metric.

IFRS 7 – Financial Instruments Disclosures outlines the importance of liquidity risk assessments.

Explanation of Each Option:IIA References:

The direct write-off method records bad debts only when an account is deemed uncollectible, meaning there is no estimation of bad debts in advance. This method is typically used when bad debts are immaterial (insignificant) because it does not adhere to the matching principle of accounting.

Simplicity and Practicality:

The direct write-off method is straightforward and only requires writing off bad debts as they occur.

It is best suited for companies where bad debt losses are minimal or rare.

Acceptable for Insignificant Losses:

If bad debts are not material, then estimating and recording an allowance in advance (as in the allowance method) may not be necessary.

Used by Small Businesses and Tax Accounting:

The IRS allows the direct write-off method for tax purposes because it recognizes expenses only when they occur.

Not Aligned with GAAP for Significant Losses:

Generally Accepted Accounting Principles (GAAP) prefer the allowance method, which estimates bad debts in advance to match expenses with related revenues.

B. It provides a better alignment with revenue:

Incorrect because the allowance method provides a better revenue-expense matching approach, not the direct write-off method.

C. It is the preferred method according to The IIA:

The IIA does not have a stated preference between the two methods; however, GAAP prefers the allowance method.

D. It states receivables at net realizable value on the balance sheet:

The allowance method states receivables at net realizable value (NRV) by estimating bad debts in advance, while the direct write-off method does not adjust receivables until a loss occurs.

IIA Standard 2120 - Risk Management: Internal auditors must assess financial risks, including credit risks and bad debt write-offs.

COSO Internal Control Framework - Financial Reporting Component: Emphasizes accurate financial reporting, where the allowance method is generally preferred for better estimation.

Key Reasons Why Option A is Correct:Why Other Options Are Incorrect:IIA References:Thus, the correct answer is A. It is useful when losses are considered insignificant.

Understanding IT Infrastructure Risks and Workstation Security:

Reviewing an organization’s IT infrastructure risks includes assessing the security of workstations (desktops, laptops, and terminals) that connect to the organization's network.

Workstations are vulnerable to physical theft, unauthorized access, and malware attacks, making physical controls a critical security measure.

Why Physical Controls Are the Most Relevant for Workstations:

Physical controls prevent unauthorized physical access, theft, tampering, and damage to workstations.

Examples include:

Locked office spaces or workstation enclosures to restrict access.

Security badges or biometric authentication to prevent unauthorized use.

Cable locks for laptops and desktop computers to deter theft.

Surveillance cameras and security guards to monitor access.

Why Other Options Are Incorrect:

A. Input controls – Incorrect.

Input controls ensure accuracy and completeness of data entry, which applies more to application security, not workstation security.

B. Segregation of duties – Incorrect.

Segregation of duties prevents fraud and conflicts of interest, but it does not directly address workstation security risks.

D. Integrity controls – Incorrect.

Integrity controls ensure data consistency and accuracy in databases and transactions, not workstation security.

IIA’s Perspective on IT Risk and Physical Security Controls:

IIA Standard 2110 – Governance requires organizations to implement physical security measures for IT assets, including workstations.

IIA GTAG (Global Technology Audit Guide) on IT Risks highlights the importance of restricting physical access to IT devices to prevent unauthorized use or data breaches.

ISO 27001 Information Security Standard recommends physical controls to secure IT infrastructure and prevent workstation-related risks.

IIA References:

IIA Standard 2110 – IT Security & Physical Access Control

IIA GTAG – Physical Security of IT Assets

ISO 27001 – Physical Security and IT Risk Management

Thus, the correct and verified answer is C. Physical controls.