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Google·Software Engineer·Technical Phone Screen·Intermediate

Intermediate
Jun 2026

Summary

Security analyst interview at Google with a scenario-based question about vulnerability prioritization. Pretty short interaction but the question had some real teeth to it if you weren't thinking carefully.

Questions Asked (1)

Q1

You have a critical vulnerability on two servers simultaneously, one inside the internal network and one in the DMZ. Which do you patch first and why?

Technical Trade-offsRoot Cause Analysis
Author's notes

My instinct was to say the DMZ server because it's internet-facing and more exposed.

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AI HintsAI Generated

Suggested Approach

Start by clarifying that the decision depends on risk assessment, not a fixed rule. Evaluate the exposure and potential impact of each vulnerability, considering factors like exploitability, data sensitivity, and business criticality. Then prioritize patching the server that poses the greatest immediate risk to the organization.

Pro tip: Mention that you would also consider the possibility of lateral movement from the DMZ to the internal network, and the importance of having a rollback plan in case the patch causes issues.

1. Assess Exposure

Determine which server is more exposed to potential attackers. The DMZ server is typically internet-facing, so it may be at higher risk of exploitation.

2. Evaluate Impact

Consider the potential impact if the vulnerability is exploited. Internal servers might contain more sensitive data or provide access to critical systems.

3. Consider Exploitability

Check if there are known exploits in the wild and how easily the vulnerability can be exploited. A wormable vulnerability might spread quickly, increasing urgency.

4. Prioritize Based on Risk

Combine exposure, impact, and exploitability to determine which server presents the highest risk. Patch that one first.

5. Mitigate and Monitor

If immediate patching isn't possible, apply temporary mitigations (e.g., firewall rules, WAF) and monitor for signs of compromise.

Key Points to Mention

  • Risk assessment framework (e.g., CVSS score, exploitability, impact)
  • DMZ vs internal network exposure and trust levels
  • Potential for lateral movement from DMZ to internal network
  • Business criticality of the affected systems
  • Availability of patches and potential downtime
  • Incident response and monitoring capabilities

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.