ISO/IEC 27001 Lead Auditor Exam 2026/2027 | Information
Security Management Systems | Complete Practice Questions,
Correct Answers & Detailed Rationales
Section 1: ISO/IEC 27001 Fundamentals and ISMS Concepts
1. What is the primary purpose of an Information Security
Management System (ISMS)?
A. To eliminate every information-security risk
B. To manage information-security risks systematically
C. To replace all cybersecurity technologies
D. To guarantee that no security incident will occur
Correct Answer: B. To manage information-security risks
systematically
Explanation/Rationale: An ISMS provides a systematic management
framework for identifying, assessing, treating, monitoring, and
improving information-security risks. It does not guarantee elimination
of every risk or prevention of every incident.
2. ISO/IEC 27001 primarily specifies requirements for:
A. Cybersecurity software
B. An Information Security Management System
C. Penetration-testing tools
D. Network architecture
Correct Answer: B. An Information Security Management System
,Explanation/Rationale: ISO/IEC 27001 defines requirements for
establishing, implementing, maintaining, and continually improving an
ISMS. (ISO)
3. Which three properties form the traditional CIA triad of information
security?
A. Compliance, Inspection, Availability
B. Confidentiality, Integrity, Availability
C. Control, Identification, Authorization
D. Confidentiality, Inspection, Authentication
Correct Answer: B. Confidentiality, Integrity, Availability
Explanation/Rationale: Confidentiality limits unauthorized disclosure,
integrity protects accuracy and completeness, and availability ensures
authorized access when needed.
4. Which activity best demonstrates confidentiality?
A. Detecting corrupted records
B. Restricting sensitive payroll data to authorized personnel
C. Restoring a failed server
D. Verifying database calculations
Correct Answer: B. Restricting sensitive payroll data to authorized
personnel
Explanation/Rationale: Confidentiality concerns preventing
unauthorized disclosure or access to information.
,5. Which activity primarily protects integrity?
A. Encrypting data during transmission
B. Preventing unauthorized alteration of financial records
C. Installing redundant servers
D. Restricting office entry
Correct Answer: B. Preventing unauthorized alteration of financial
records
Explanation/Rationale: Integrity concerns maintaining the accuracy,
completeness, and protection of information against unauthorized
modification.
6. Which situation primarily represents an availability concern?
A. A confidential file is publicly disclosed
B. A database is altered without authorization
C. A critical application is unavailable during business operations
D. An employee reads a file without permission
Correct Answer: C. A critical application is unavailable during business
operations
Explanation/Rationale: Availability means information and associated
services are accessible when required by authorized users.
7. Which statement best describes risk in an ISMS context?
, A. A guaranteed loss
B. The effect of uncertainty on objectives
C. A security control
D. A completed security incident
Correct Answer: B. The effect of uncertainty on objectives
Explanation/Rationale: Risk-based management considers uncertainty
and its potential effect on objectives, allowing the organization to
determine appropriate treatment.
8. What is risk treatment?
A. Ignoring identified risks
B. Selecting and implementing measures to modify risk
C. Recording incidents only
D. Performing an external audit
Correct Answer: B. Selecting and implementing measures to modify
risk
Explanation/Rationale: Risk treatment involves choosing appropriate
responses such as modifying, avoiding, sharing, or retaining risk.
9. Which is an example of risk avoidance?
A. Purchasing cyber insurance
B. Implementing stronger authentication
C. Discontinuing a high-risk service
D. Accepting the existing risk
Security Management Systems | Complete Practice Questions,
Correct Answers & Detailed Rationales
Section 1: ISO/IEC 27001 Fundamentals and ISMS Concepts
1. What is the primary purpose of an Information Security
Management System (ISMS)?
A. To eliminate every information-security risk
B. To manage information-security risks systematically
C. To replace all cybersecurity technologies
D. To guarantee that no security incident will occur
Correct Answer: B. To manage information-security risks
systematically
Explanation/Rationale: An ISMS provides a systematic management
framework for identifying, assessing, treating, monitoring, and
improving information-security risks. It does not guarantee elimination
of every risk or prevention of every incident.
2. ISO/IEC 27001 primarily specifies requirements for:
A. Cybersecurity software
B. An Information Security Management System
C. Penetration-testing tools
D. Network architecture
Correct Answer: B. An Information Security Management System
,Explanation/Rationale: ISO/IEC 27001 defines requirements for
establishing, implementing, maintaining, and continually improving an
ISMS. (ISO)
3. Which three properties form the traditional CIA triad of information
security?
A. Compliance, Inspection, Availability
B. Confidentiality, Integrity, Availability
C. Control, Identification, Authorization
D. Confidentiality, Inspection, Authentication
Correct Answer: B. Confidentiality, Integrity, Availability
Explanation/Rationale: Confidentiality limits unauthorized disclosure,
integrity protects accuracy and completeness, and availability ensures
authorized access when needed.
4. Which activity best demonstrates confidentiality?
A. Detecting corrupted records
B. Restricting sensitive payroll data to authorized personnel
C. Restoring a failed server
D. Verifying database calculations
Correct Answer: B. Restricting sensitive payroll data to authorized
personnel
Explanation/Rationale: Confidentiality concerns preventing
unauthorized disclosure or access to information.
,5. Which activity primarily protects integrity?
A. Encrypting data during transmission
B. Preventing unauthorized alteration of financial records
C. Installing redundant servers
D. Restricting office entry
Correct Answer: B. Preventing unauthorized alteration of financial
records
Explanation/Rationale: Integrity concerns maintaining the accuracy,
completeness, and protection of information against unauthorized
modification.
6. Which situation primarily represents an availability concern?
A. A confidential file is publicly disclosed
B. A database is altered without authorization
C. A critical application is unavailable during business operations
D. An employee reads a file without permission
Correct Answer: C. A critical application is unavailable during business
operations
Explanation/Rationale: Availability means information and associated
services are accessible when required by authorized users.
7. Which statement best describes risk in an ISMS context?
, A. A guaranteed loss
B. The effect of uncertainty on objectives
C. A security control
D. A completed security incident
Correct Answer: B. The effect of uncertainty on objectives
Explanation/Rationale: Risk-based management considers uncertainty
and its potential effect on objectives, allowing the organization to
determine appropriate treatment.
8. What is risk treatment?
A. Ignoring identified risks
B. Selecting and implementing measures to modify risk
C. Recording incidents only
D. Performing an external audit
Correct Answer: B. Selecting and implementing measures to modify
risk
Explanation/Rationale: Risk treatment involves choosing appropriate
responses such as modifying, avoiding, sharing, or retaining risk.
9. Which is an example of risk avoidance?
A. Purchasing cyber insurance
B. Implementing stronger authentication
C. Discontinuing a high-risk service
D. Accepting the existing risk
