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Backups are the best control to mitigate the impact of a failed IT system upgrade project that has resulted in the corruption of an organization’s asset inventory database, as they allow theorganization to restore the data from a previous state and resume normal operations. Encryption, authentication, and configuration are not the best controls, as they do not address the data corruption issue, but rather the datasecurity, access, and quality issues, respectively. References = CRISC Review Manual, 7th Edition, page 153.

The most important reason to validate that risk responses have been executed as outlined in the risk response plan is to ensure that the residual risk is at an acceptable level. Residual risk is the risk that remains after applying a risk response. The risk response plan is the document thatdescribes the actions and resources needed to address the risk. Validating the risk response execution is the process of verifying that the risk response actions have been performed as planned, and that they have achieved the desired results. Validating the risk response execution helps to measure and monitor the residual risk, and to ensure that it is within the risk tolerance of the organization and its stakeholders. The other reasons are not as important as ensuring that the residual risk is at an acceptable level, although they may be secondary benefits or outcomes of validating the risk response execution. References = Risk and Information Systems Control Study Manual, Chapter 4, Section 4.3.1, page 4-23.

 The greatest concern for the risk practitioner when the potential vendor has offered to perform quarterly self-audits of its controls instead of having annual independent audits is that the controls may not be properly tested. Self-audits are audits that are performed by the vendor itself, without the involvement of an external or independent party. Self-audits may not be reliable, objective, or consistent, as the vendor may have biases, conflicts of interest, or lack of expertise in auditing its own controls. Self-audits may also not follow the same standards, criteria, or methodologies as independent audits, and may not provide sufficient assurance or evidence of the effectiveness of the controls. The other options are not as concerning as the possibility of improper testing of the controls, as they are related to the outcomes, expectations, or approaches of the controls, not the quality or validity of the controls. References = Risk and Information Systems Control Study Manual, Chapter 2: IT Risk Assessment, Section 2.3: IT Control Assessment, page 6

 Controls are the mechanisms or procedures that ensure the security, reliability, and quality of an IT system or process. Controls can be preventive, detective, or corrective, and can be implemented at various levels, such as physical, logical, administrative, or technical. Controls should be defined during the design phase of system development because it is more cost-effective to determine controls in the early design phase. The design phase is the stage where the system requirements are translated into a detailed technical plan, which includes the system architecture, database structure, user interface, and system components. The design phase also defines the system objectives, goals, and performance criteria. Defining controls during the design phase can help ensure that the controls are aligned with the system requirements and objectives, and that they are integrated into the system design from the start. Defining controls during the design phase can also help avoid or reduce the costs and risks associated with implementing controls later in the development or operation phases, such as rework, delays, errors, failures, or breaches. References = THE SYSTEM DEVELOPMENT LIFE CYCLE (SDLC), p. 2-3, System Development LifeCycle - GeeksforGeeks, 7.3: Systems Development Life Cycle - Engineering LibreTexts, What Is SDLC? 7 Phases of System Development Life Cycle - Intetics.