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Question 70
A developer uses AI-generated guidance for a regulated financial application. A team ships generated code without keeping any testing or reviewer evidence. Which response best addresses the stated risk or requirement?
- Complete data protection and vendor review before changing data flows.
- Verify the rate against the applicable authoritative jurisdictional source.
- Preserve audit-ready test, review, and approval records for the release.
- Report observations and gaps without claiming formal certification.
Explanation
Correct Answer
C:Traceability helps demonstrate that required controls actually ran.
Incorrect Answers
A:Sending regulated data to another processor is a governance decision. This addresses a different situation: The assistant proposes saving customer records to a new external analytics service.
B:Legally significant numbers require current verified evidence. This addresses a different situation: A generated tax calculation includes a confident but unsupported local rate.
D:Compliance attestation requires the defined independent evidence and approval process. This addresses a different situation: A developer asks the model to certify compliance based on reading source files.
Question 71
A team has received a lengthy Copilot explanation of cryptographic code. The assistant incorrectly describes reversible encryption as one-way hashing. Which recommendation directly resolves this issue?
- Prefer vetted standard cryptography and supported implementations.
- Verify the algorithm's actual security property against a trusted reference.
- Use an approved constant-time comparison for sensitive authentication values.
- Assess cryptographic parameters and attack resistance separately from compilation.
Explanation
Correct Answer
B:Encryption and one-way hashing protect different security goals.
Incorrect Answers
A:Unreviewed custom encryption is not a safe replacement for established primitives. This addresses a different situation: A proposal uses a custom cipher invented by the model.
C:Timing differences in secret comparisons may reveal information. This addresses a different situation: The proposed secret comparison exits on the first mismatch.
D:Build success does not establish cryptographic soundness. This addresses a different situation: A model states its example is secure merely because it compiles.
Question 72
A team has received a lengthy Copilot explanation of cryptographic code. A generated function uses a hard-coded initialization vector for every message. Which action is the most appropriate response to this situation?
- Assess cryptographic parameters and attack resistance separately from compilation.
- Verify the algorithm's actual security property against a trusted reference.
- Use an approved constant-time comparison for sensitive authentication values.
- Use the construction's required random or unique nonce handling.
Explanation
Correct Answer
D:Nonce reuse can undermine the security of common encryption schemes.
Incorrect Answers
A:Build success does not establish cryptographic soundness. This addresses a different situation: A model states its example is secure merely because it compiles.
B:Encryption and one-way hashing protect different security goals. This addresses a different situation: The assistant incorrectly describes reversible encryption as one-way hashing.
C:Timing differences in secret comparisons may reveal information. This addresses a different situation: The proposed secret comparison exits on the first mismatch.
Question 73
A team has received a lengthy Copilot explanation of cryptographic code. A proposal uses a custom cipher invented by the model. What should the developer do before accepting the proposed result?
- Prefer vetted standard cryptography and supported implementations.
- Use an approved constant-time comparison for sensitive authentication values.
- Verify the algorithm's actual security property against a trusted reference.
- Use the construction's required random or unique nonce handling.
Explanation
Correct Answer
A:Unreviewed custom encryption is not a safe replacement for established primitives.
Incorrect Answers
B:Timing differences in secret comparisons may reveal information. This addresses a different situation: The proposed secret comparison exits on the first mismatch.
C:Encryption and one-way hashing protect different security goals. This addresses a different situation: The assistant incorrectly describes reversible encryption as one-way hashing.
D:Nonce reuse can undermine the security of common encryption schemes. This addresses a different situation: A generated function uses a hard-coded initialization vector for every message.
Question 74
A team has received a lengthy Copilot explanation of cryptographic code. A model states its example is secure merely because it compiles. Which response best addresses the stated risk or requirement?
- Assess cryptographic parameters and attack resistance separately from compilation.
- Use the construction's required random or unique nonce handling.
- Verify the algorithm's actual security property against a trusted reference.
- Prefer vetted standard cryptography and supported implementations.
Explanation
Correct Answer
A:Build success does not establish cryptographic soundness.
Incorrect Answers
B:Nonce reuse can undermine the security of common encryption schemes. This addresses a different situation: A generated function uses a hard-coded initialization vector for every message.
C:Encryption and one-way hashing protect different security goals. This addresses a different situation: The assistant incorrectly describes reversible encryption as one-way hashing.
D:Unreviewed custom encryption is not a safe replacement for established primitives. This addresses a different situation: A proposal uses a custom cipher invented by the model.
Question 75
A team has received a lengthy Copilot explanation of cryptographic code. The proposed secret comparison exits on the first mismatch. What is the most defensible next step under responsible development practices?
- Assess cryptographic parameters and attack resistance separately from compilation.
- Use an approved constant-time comparison for sensitive authentication values.
- Prefer vetted standard cryptography and supported implementations.
- Use the construction's required random or unique nonce handling.
Explanation
Correct Answer
B:Timing differences in secret comparisons may reveal information.
Incorrect Answers
A:Build success does not establish cryptographic soundness. This addresses a different situation: A model states its example is secure merely because it compiles.
C:Unreviewed custom encryption is not a safe replacement for established primitives. This addresses a different situation: A proposal uses a custom cipher invented by the model.
D:Nonce reuse can undermine the security of common encryption schemes. This addresses a different situation: A generated function uses a hard-coded initialization vector for every message.
Question 76
An engineer asks Copilot to help debug failures in a sensitive production service. A user provides a full customer data export to obtain a simple parser example. Which action is the most appropriate response to this situation?
- Scope shared context to the minimal safe files and sections.
- Treat the value as untrusted and verify it is an inert placeholder before reuse.
- Deny access until a justified authorization and task need are established.
- Create synthetic representative examples instead of sending live customer records.
Explanation
Correct Answer
D:An illustrative parser need not process unnecessary production personal data.
Incorrect Answers
A:Excess context increases privacy and confidentiality exposure. This addresses a different situation: The assistant asks for an entire private repository though only one function is relevant.
B:Example credentials must not become live authentication material. This addresses a different situation: A generated code sample contains a realistic-looking production API key.
C:Least-privilege context limits unintended cross-project disclosure. This addresses a different situation: An AI suggestion asks to access an unrelated repository for additional information.
Question 77
An engineer asks Copilot to help debug failures in a sensitive production service. The developer copies secrets into an issue that an AI agent will later inspect. What should the developer do before accepting the proposed result?
- Remove secrets at the source and rotate any exposed credentials.
- Deny access until a justified authorization and task need are established.
- Create synthetic representative examples instead of sending live customer records.
- Treat the value as untrusted and verify it is an inert placeholder before reuse.
Explanation
Correct Answer
A:Sanitization belongs in the repository workflow before downstream AI access.
Incorrect Answers
B:Least-privilege context limits unintended cross-project disclosure. This addresses a different situation: An AI suggestion asks to access an unrelated repository for additional information.
C:An illustrative parser need not process unnecessary production personal data. This addresses a different situation: A user provides a full customer data export to obtain a simple parser example.
D:Example credentials must not become live authentication material. This addresses a different situation: A generated code sample contains a realistic-looking production API key.
Question 78
An engineer asks Copilot to help debug failures in a sensitive production service. The assistant asks for an entire private repository though only one function is relevant. Which response best addresses the stated risk or requirement?
- Remove secrets at the source and rotate any exposed credentials.
- Create synthetic representative examples instead of sending live customer records.
- Treat the value as untrusted and verify it is an inert placeholder before reuse.
- Scope shared context to the minimal safe files and sections.
Explanation
Correct Answer
D:Excess context increases privacy and confidentiality exposure.
Incorrect Answers
A:Sanitization belongs in the repository workflow before downstream AI access. This addresses a different situation: The developer copies secrets into an issue that an AI agent will later inspect.
B:An illustrative parser need not process unnecessary production personal data. This addresses a different situation: A user provides a full customer data export to obtain a simple parser example.
C:Example credentials must not become live authentication material. This addresses a different situation: A generated code sample contains a realistic-looking production API key.
Question 79
An engineer asks Copilot to help debug failures in a sensitive production service. An AI suggestion asks to access an unrelated repository for additional information. What is the most defensible next step under responsible development practices?
- Deny access until a justified authorization and task need are established.
- Scope shared context to the minimal safe files and sections.
- Remove secrets at the source and rotate any exposed credentials.
- Create synthetic representative examples instead of sending live customer records.
Explanation
Correct Answer
A:Least-privilege context limits unintended cross-project disclosure.
Incorrect Answers
B:Excess context increases privacy and confidentiality exposure. This addresses a different situation: The assistant asks for an entire private repository though only one function is relevant.
C:Sanitization belongs in the repository workflow before downstream AI access. This addresses a different situation: The developer copies secrets into an issue that an AI agent will later inspect.
D:An illustrative parser need not process unnecessary production personal data. This addresses a different situation: A user provides a full customer data export to obtain a simple parser example.
Question 80
An engineer asks Copilot to help debug failures in a sensitive production service. A generated code sample contains a realistic-looking production API key. Which recommendation directly resolves this issue?
- Remove secrets at the source and rotate any exposed credentials.
- Scope shared context to the minimal safe files and sections.
- Treat the value as untrusted and verify it is an inert placeholder before reuse.
- Deny access until a justified authorization and task need are established.
Explanation
Correct Answer
C:Example credentials must not become live authentication material.
Incorrect Answers
A:Sanitization belongs in the repository workflow before downstream AI access. This addresses a different situation: The developer copies secrets into an issue that an AI agent will later inspect.
B:Excess context increases privacy and confidentiality exposure. This addresses a different situation: The assistant asks for an entire private repository though only one function is relevant.
D:Least-privilege context limits unintended cross-project disclosure. This addresses a different situation: An AI suggestion asks to access an unrelated repository for additional information.
GitHub Copilot (GH-300) Practice Tests
