CISSP Practice Test 5 — 10 Questions

Question 1

A company's security team discovers that an employee inadvertently shared sensitive customer data via a public cloud storage link. The incident response team contains the breach and notifies affected customers. Which of the following risk management strategies would BEST prevent recurrence?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Deploy a Data Loss Prevention (DLP) solution that monitors and controls sharing of sensitive data.. A Data Loss Prevention (DLP) solution provides automated, policy-based monitoring and control of sensitive data being shared via public cloud storage links. Unlike awareness training (which relies on human behavior) or blanket blocking (which hinders productivity), DLP can inspect content in real time using pattern matching, fingerprinting, or exact data matching to prevent unauthorized sharing before it occurs, directly addressing the root cause of inadvertent exposure.

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Block all access to public cloud storage services from corporate devices.

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Implement mandatory security awareness training focusing on data handling procedures.

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Encrypt all sensitive data at rest and in transit to render shared data useless.

Question 2

A multinational corporation with a hybrid cloud infrastructure has recently experienced a series of security incidents involving unauthorized access to sensitive customer data. The incidents were traced to compromised credentials of privileged users. The company has implemented multi-factor authentication (MFA) for all privileged accounts, but the attacks persisted. A security assessment team is brought in to evaluate the environment. During the assessment, they discover that some privileged accounts do not require MFA when accessing systems via API calls, and that session tokens for these APIs have a long expiration time of 24 hours. Additionally, the team finds that the logging and monitoring system does not capture API calls from privileged accounts, making it difficult to detect anomalous behavior. The company wants to remediate these issues effectively. Which of the following is the BEST course of action to address the root cause of the incidents?

Accepted Answer

Require MFA for all privileged access methods, including APIs, and reduce session token expiration to 15 minutes.. The root cause is that privileged accounts can bypass MFA when accessing systems via API calls, and long-lived session tokens (24 hours) provide a wide window for attackers to reuse stolen tokens. Requiring MFA for all privileged access methods, including APIs, closes the authentication gap, and reducing session token expiration to 15 minutes minimizes the impact of token theft by limiting the reuse window. This directly addresses the two key vulnerabilities identified in the assessment.

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Implement a SIEM system to analyze logs from all sources and create alerts for anomalous API activity.

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Conduct a full audit of privileged account usage and revoke access for any accounts with suspicious activity.

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Replace API tokens with certificate-based authentication for all privileged accounts.

Question 3

In a microservices architecture with a service mesh, what is the most effective approach to secure inter-service communication?

Accepted Answer

Implement mutual TLS (mTLS) and identity-based access policies. In a service mesh, mutual TLS (mTLS) provides both encryption and identity verification for every inter-service call, ensuring that only authenticated services with the correct identity can communicate. Identity-based access policies (e.g., using SPIFFE IDs) then enforce fine-grained authorization, which is essential in dynamic microservices environments where IP addresses are ephemeral. This combination directly addresses the core security requirements of confidentiality, integrity, and authentication in zero-trust architectures.

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Segment services into separate VLANs without encryption

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Use TLS only for all communication

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Rely on API keys in the request headers

Question 4

A security architect is designing a secure enclave for processing highly sensitive data. The architecture must ensure that even if the operating system is compromised, the enclave's memory contents remain confidential and integrity-protected. Which technology should be used?

Accepted Answer

Intel Software Guard Extensions (SGX). Intel Software Guard Extensions (SGX) is the correct choice because it provides hardware-enforced isolation of memory regions (enclaves) that remain confidential and integrity-protected even if the operating system or hypervisor is compromised. SGX encrypts enclave memory on-die and decrypts it only within the CPU, preventing any privileged software from reading or tampering with the data.

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Full disk encryption (FDE) with a strong passphrase

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Trusted Platform Module (TPM)

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Hypervisor-based isolation

Question 5

A security engineer is reviewing the architecture of a system that uses the Bell-LaPadula model. The system has subjects with security clearances and objects with classifications. To prevent covert timing channels, which additional control should be implemented?

Accepted Answer

Disable concurrent access to shared resources. Covert timing channels exploit the ability of a subject to modulate the timing of its access to a shared resource, thereby leaking information to another subject at a different security level. The Bell-LaPadula model enforces mandatory access control (MAC) but does not inherently prevent these channels. Disabling concurrent access to shared resources (option C) eliminates the ability to use timing variations as a signaling mechanism, directly addressing the covert channel at the resource scheduling level.

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Enforce strict data labeling

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Implement audit logging

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Use encryption for data at rest

Question 6

A company uses SSH for remote administration. To enhance security, they want to implement public-key authentication. Which statement about SSH public-key authentication is true?

Accepted Answer

The private key must be kept secret by the user. In SSH public-key authentication, the private key is the secret half of the asymmetric key pair and must be kept confidential by the user. The server stores only the public key, and authentication is proven by the client signing a challenge with the private key, which the server verifies using the stored public key. This ensures that even if the server is compromised, the private key remains safe on the client side.

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The public key is used to decrypt the session

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Public-key authentication does not require a passphrase

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The private key is stored on the server

Question 7

In OAuth 2.0, which grant type is recommended for a native mobile application that cannot securely store a client secret, and uses PKCE?

Accepted Answer

Authorization Code grant with PKCE. The Authorization Code grant with PKCE (Proof Key for Code Exchange, RFC 7636) is the OAuth 2.0 best practice for public clients like native mobile apps that cannot keep a client secret. PKCE replaces the static client secret with a dynamically generated code_verifier/code_challenge pair, preventing authorization code interception attacks.

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Client Credentials grant

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Implicit grant

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Device Code grant

Question 8

A security tester needs to test a new application for vulnerabilities but is concerned about contaminating the production database with test data. What is the best practice for conducting such tests?

Accepted Answer

Create a separate test environment with anonymized production data. Creating a separate test environment with anonymized production data ensures that testing does not affect the integrity or availability of the production database while still using realistic data to uncover vulnerabilities. Anonymization techniques, such as data masking or tokenization, remove personally identifiable information (PII) while preserving referential integrity and data distribution, allowing for accurate security testing without contaminating production systems.

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Perform the test on the production environment during off-hours

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Test only from the network perimeter to avoid data exposure

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Use synthetic data that mimics production but is not real

Question 9

A company is considering outsourcing its customer support operations to a third-party vendor. Which of the following should be the PRIMARY risk management activity before finalizing the contract?

Accepted Answer

Conduct a thorough vendor risk assessment including security audits.. Before outsourcing critical operations, the primary risk management activity is to conduct a thorough vendor risk assessment, including security audits. This evaluates the vendor's security posture, compliance with standards (e.g., ISO 27001), and ability to protect sensitive customer data, directly addressing risks like data breaches or service disruptions before contractual obligations are locked in.

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Negotiate a lower price to offset potential security investments.

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Purchase cyber liability insurance to cover potential breaches.

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Require the vendor to sign a non-disclosure agreement (NDA).

Question 10

A multinational corporation must ensure that data leaving the organization's network is classified and labeled appropriately. Which of the following is the MOST effective method to enforce consistent labeling across all data types?

Accepted Answer

Implement automated data classification tools that scan for sensitive content and apply labels. Automated data classification tools (e.g., Microsoft Purview, Symantec DLP) use content inspection, pattern matching, and machine learning to scan data at rest, in use, and in transit. They apply consistent labels based on predefined policies (e.g., regex for PII, fingerprinting for IP), ensuring uniform labeling across all data types without relying on human consistency or manual effort.

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Appoint data stewards in each department to manually review and label data

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Require all employees to complete annual training on data classification

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Encrypt all data in transit and at rest to prevent unauthorized access