Free ISO-IEC-27001-Lead-Implementer Practice Test Questions 2026

Summary:
An effective communication strategy is not just about sending messages but also about engaging in a two-way dialogue. The scenario describes a platform (Q&A section) designed for interaction, but the company fails to participate in that interaction. This indicates a breakdown in the ongoing conversation, not in the initial clarity or format of the communication.

Correct Option:

C. Responsiveness.
This is the principle that has not been followed. Responsiveness involves acknowledging, replying to, and engaging with received communications in a timely manner. By creating a Q&A section but failing to provide answers, Kyte is ignoring user inquiries, which is a direct failure of responsiveness and defeats the purpose of the communication channel.

Incorrect Option:

A. Clarity.
This principle relates to how understandable, unambiguous, and coherent a message is. The problem is not that the company's messages are unclear, but that they are not providing any messages (answers) at all in the Q&A forum.

B. Appropriateness.
This principle concerns whether the communication channel, format, and style are suitable for the target audience and message. The Q&A section is an appropriate channel for user questions. The failure lies in the company's lack of action (not responding), not in the choice of the channel itself.

Reference:
While ISO/IEC 27001 does not detail communication principles, the requirement for effective communication is embedded in its framework. For broader management system principles, one can refer to ISO's core principles, and for specific guidance on communication, standards like ISO 10001:2018 (Quality management - Customer satisfaction - Guidelines for codes of conduct for organizations) emphasize the importance of responsiveness to customer communication. The failure to answer questions directly violates the principle of maintaining a two-way communication process.

Summary:
ISO/IEC 27001 requires an organization to maintain documented information necessary for the effectiveness of its ISMS. This includes documenting the operation of processes and controls. Documenting the function of each implemented security control provides evidence of how the control is intended to operate and supports consistency, making it a compliant and recommended practice.

Correct Option:

C. Yes, but documenting each security control and not the process in general will make it difficult to review the documented information.
This is the correct and most accurate statement. The standard does require documented information to support the operation of controls (Clause 8.1). Therefore, describing their functions is compliant. However, the note of caution is valid; a purely control-centric documentation approach without overarching process descriptions can make the system seem fragmented and harder to review holistically.

Incorrect Option:

A. No, the standard requires to document only the operation of processes and controls, so no description of each security control is needed.
This is incorrect and contradictory. Documenting the "operation of controls" inherently involves describing what the control is and how it functions. The standard requires this documented information to ensure effective operation.

B. No, because the documented information should have a strict format, including the date, version number and author identification.
This is incorrect. While good practice for document control (addressed in Clause 7.5), the standard does not prescribe a strict format for all documented information. The requirement is for the information to exist and be controlled, not for it to follow a single, rigid template.

Reference:
ISO/IEC 27001:2022, Clause 8.1 (Operational planning and control). It requires the organization to "establish, implement, control and maintain the processes needed to meet information security requirements" and to "retain documented information to the extent necessary to have confidence that the processes have been carried out as planned." Documenting the function of each control is a direct way to demonstrate this.

Summary:
This question tests the understanding of the core principles of information security: Confidentiality, Integrity, and Availability (CIA). The scenario describes an unauthorized and accidental modification of data (order details), which directly impacts the accuracy and trustworthiness of that information.

Correct Option:

C. Integrity.
The breach was against the integrity of the information. Integrity ensures that data is accurate, complete, and has not been altered in an unauthorized manner. Diana's accidental modification of the order details without permission is an unauthorized alteration, making the data incorrect and leading to the wrong product being shipped.

Incorrect Option:

A. Availability.
Availability means that information is accessible to authorized users when they need it. The scenario does not mention that the order details were unavailable or inaccessible; the problem was that the available data was wrong.

B. Confidentiality.
Confidentiality involves protecting information from unauthorized disclosure. The scenario does not describe the customer's data being seen by unauthorized individuals; it describes the data being incorrectly changed.

Reference:
ISO/IEC 27000:2018, "Information technology — Security techniques — Information security management systems — Overview and vocabulary." This standard defines integrity as the "property of accuracy and completeness." The unauthorized modification of the order details is a direct violation of this property.

Summary:
To effectively correlate events from different systems (like servers, network devices, and workstations) for analysis and investigation, it is essential that all timestamps are consistent and accurate. Without synchronized time, establishing a reliable sequence of events across multiple logs is impossible, which severely hinders incident investigation and forensic analysis.

Correct Option:

B. Clock synchronization.
This is the correct control. It ensures that all systems use a common, accurate time source. This allows logs from different systems to be aligned chronologically, enabling security teams to reconstruct the timeline of an attack, correlate related events, and provide reliable evidence for investigations.

Incorrect Option:

A. Use of privileged utility programs.
This control (A.8.6) is about restricting and monitoring the use of powerful administrative tools. While its logs are important, it does not itself enable the correlation of events from multiple sources; it is a subject of logging, not the mechanism that makes correlation possible.

C. Installation of software on operational systems.
This control (A.8.31) governs the rules for deploying new software to prevent unauthorized changes. It is a preventive control for system integrity, but it does not facilitate the logging or correlation of security events for analysis.

Reference:
ISO/IEC 27001:2022, Annex A, Control A.8.20 (Clock synchronization). The official purpose of this control is to "ensure the correctness of clocks in information processing systems" to support the correlation of security-relevant events across different systems, which is a direct requirement for effective incident investigation and analysis.

Summary:
ISO/IEC 27001 requires that internal audits are conducted by personnel who are objective and impartial. For a small organization, it can be challenging to have staff with the necessary expertise who are also independent from the processes they are auditing. Outsourcing to a competent external party is a recognized and often preferred method to ensure this required independence.

Correct Option:

A. Yes, outsourcing the internal audit function to a third party is often a better option for small organizations to demonstrate independence and impartiality.
This is correct. An external third-party auditor is inherently independent from the internal organizational structure and politics. This provides a higher degree of objectivity and impartiality, which are key requirements of the audit process. For small companies with limited staff, this is a practical and compliant solution.

Option:

B. No, the organizations cannot outsource the internal audit function to a third party because during internal audit, the organization audits its own system.
This is incorrect. The requirement is for the audit to be an internal function of the ISMS, not that it must be performed by employees. "Internal" refers to the purpose and scope of the audit (i.e., for internal management review), not the employment status of the auditors.

C. No, the outsourcing of the internal audit function may compromise the independence and impartiality of the internal audit team.
This is the opposite of the truth. Outsourcing to a qualified third party typically enhances independence and impartiality, as the external auditors have no stake in the outcomes and are not influenced by internal relationships.

Reference:
ISO/IEC 27001:2022, Clause 9.2 (Internal audit), which states that "the selection of audit methods and ensuring the objectivity and the impartiality of the audit process" are required. The supporting guidance in ISO 19011:2018 confirms that audit teams can include persons from outside the organization, and this is a common practice to ensure impartiality, especially for smaller entities.

Summary:
Continual improvement in an ISMS is a cyclical process of setting goals, implementing actions, checking performance, and acting to improve. Action plans are the formal mechanism for planning and tracking these improvement activities. They translate findings from audits, reviews, and incidents into concrete steps, making them the primary driver for moving the ISMS forward.

Correct Option:

B. The update of action plans.
This is the correct answer. Action plans (often derived from risk treatment plans, corrective actions, and management review outputs) specify the what, who, and when for implementing improvements. Regularly updating and completing these plans is the tangible process that directly supports and evidences continual improvement of the ISMS.

Incorrect Option:

A. The update of documented information.
While updating documents (like policies and procedures) is often an output of an improvement action, it is not the primary driver. The update is a consequence of a change, not the improvement process itself. Improvement is first decided and planned, and then documentation is updated to reflect it.

C. The update of internal audit reports.
Audit reports are a key input for identifying areas for improvement, but they are a source of information, not the mechanism for improvement itself. The improvement is enacted through the action plans created to address the audit findings, not by merely updating the report.

Reference:
ISO/IEC 27001:2022, Clause 10 (Improvement). This clause requires the organization to continually improve the suitability, adequacy, and effectiveness of the ISMS. This is operationalized through actions to address nonconformities and is managed through processes that inherently rely on planning and implementing action plans to achieve improvement objectives.

Summary:
The scenario indicates a failure in the organization's process for determining competence needs. Effective training must be tailored to the audience's roles and pre-existing knowledge. Lisa, an HR professional, is struggling with technically-focused content that is not relevant to her job functions. This points to a failure in the analysis and design phase of the training program, not a personal failure of the employee.

Correct Option:

C. Skyver did not determine differing team needs in accordance to the activities they perform and the intended results.
This is the root cause. The training was delivered with a one-size-fits-all approach, failing to account for the different competence requirements of a non-technical HR role versus a technical IT role. The content was not appropriate for Lisa's job activities, leading to a lack of understanding.

Incorrect Option:

A. Lisa did not take actions to acquire the necessary competence.
This is incorrect and unfairly blames the employee. The scenario shows Lisa actively seeking help, demonstrating her willingness to learn. The responsibility lies with the organization to provide accessible and relevant training. Competence is developed by the organization, not just acquired by the employee alone.

B. The effectiveness of the training and awareness session was not evaluated.
While the evaluation of effectiveness is crucial, Lisa's confusion is an input to that evaluation, not an indication that evaluation didn't happen. The problem identified is the session's poor design and delivery for her role, which is a cause of ineffectiveness, not the lack of an evaluation process.

Reference:
ISO/IEC 27001:2022, Clause 7.2 (Competence). The standard requires the organization to "determine the necessary competence of person(s) doing work under its control that affects its performance." It further requires training to be applied "relevant to the needs of the organization." Delivering overly technical training to an HR employee indicates a failure to properly determine her specific competence needs.

Summary:
Residual risk is the level of risk that remains after risk treatment measures have been applied. The scenario explicitly states that risks falling below the acceptable level will be accepted. Therefore, the process for dealing with residual risks is not to automatically implement more controls, but to formally accept them through a management decision, provided they are within the organization's risk appetite.

Correct Option:

C. TradeB should accept the residual risks only above the acceptance level.
This statement is logically correct based on the scenario's own criteria. It implies that risks below the acceptance level are formally accepted, which is the standard process. The phrase "only above" confirms that any risk still above the threshold after treatment would require further action (e.g., additional treatment or justified acceptance), making this the most accurate description of the required process.

Incorrect Option:

A. TradeB should evaluate, calculate, and document the value of risk reduction following risk treatment.
While evaluating and documenting the results of risk treatment is a good practice, the scenario already specifies the decisive criterion: comparison to the acceptable risk level. The primary action for residual risk is the acceptance decision, not the calculation of reduction value.

B. TradeB should immediately implement new controls to treat all residual risks.
This is incorrect and contradicts the fundamental principle of risk management. The goal is to reduce risk to an acceptable level, not to eliminate it entirely. Treating all residual risks is often impractical, unnecessary, and cost-ineffective. The decision to accept residual risk is a valid and essential part of the process.

Reference:
ISO/IEC 27001:2022, Clause 6.1.3 (Information security risk treatment). It requires the organization to "define and implement an information security risk treatment process" and to "retain documented information about the information security risk treatment process." This process includes comparing the residual risk levels after treatment against the risk acceptance criteria and formally accepting those that are within the agreed-upon levels. The scenario's report directly aligns with this requirement.

Explanation: The power/interest matrix is a tool that can be used to identify, analyze, and manage interested parties according to ISO/IEC 27001:2022. The power/interest matrix is a two-dimensional diagram that plots the level of power and interest of each interested party in relation to the organization’s information security objectives. The power/interest matrix can help the organization to prioritize the interested parties, understand their expectations and needs, and develop appropriate communication and engagement strategies. The power/interest matrix can also help the organization to identify potential risks and opportunities related to the interested parties.

Explanation: According to ISO/IEC 27001:2022, a nonconformity report is a document that records the details of any deviation from the audit criteria that is identified during an audit2. The audit criteria are the set of policies, procedures, requirements, or specifications that are used as a reference against which audit evidence is compared3. Therefore, a nonconformity report must include the following aspects:

• The description of the nonconformity, which should clearly state what the deviation is, where it occurred, and when it was detected.
• The audit findings, which should provide the objective evidence that supports the identification of the nonconformity.
• The audit criteria, which should specify the reference document or standard that the nonconformity deviates from.
• The recommendations, which should suggest the possible corrective actions or improvements that can be taken to address the nonconformity.

Explanation: According to ISO/IEC 27001:2022, clause 6.1.3, the Statement of Applicability (SoA) is a document that identifies the controls that are applicable to the organization’s ISMS and explains why they are selected or not. The SoA is based on the results of the risk assessment and risk treatment, which are the previous steps in the risk management process. Therefore, the justification for the exclusion of a control should be based on the risk assessment results and the risk treatment plan, and should reflect the purpose and objective of the control.
Control 5.18 of ISO/IEC 27001:2022 is about access rights to information and other associated assets, which should be provisioned, reviewed, modified and removed in accordance with the organization’s topic-specific policy on and rules for access control. The purpose of this control is to prevent unauthorized access to, modification of, and destruction of information assets. Therefore, the justification for the exclusion of this control should explain why the organization does not need to implement this control to protect its information assets from unauthorized access.
The justification given by the organization in the question is not acceptable, because it does not reflect the purpose of control 5.18. An access control reader at the main entrance of the building is a physical security measure, which is related to control 5.15 of ISO/IEC 27001:2022, not control 5.18. Control 5.18 is about logical access rights to information systems and services, which are not addressed by the access control reader. Therefore, the organization should either provide a valid justification for the exclusion of control 5.18, or include it in the SoA and implement it according to the risk assessment and risk treatment results.