At rest: Encryption (AWS-managed or KMS). In transit: SSL/TLS; rds.force_ssl=1; ACM. Best practice: Encrypt new instances; enforce SSL in parameter group; VPC + security groups; IAM auth optional; rotate credentials; CloudTrail and Enhanced Monitoring.
This easy-level Cloud/Tools question appears frequently in data engineering interviews at companies like Persistent Systems. While less common, it tests deeper understanding that distinguishes strong candidates.
Start by clearly defining the core concept being asked about. Interviewers want to see that you understand the fundamentals before diving into implementation details. Structure your answer with a definition, then explain the practical application with a concise example.
At rest: Encryption (AWS-managed or KMS). In transit: SSL/TLS; rds.force_ssl=1; ACM. Best practice: Encrypt new instances; enforce SSL in parameter group; VPC + security groups; IAM auth optional; rotate credentials; CloudTrail and Enhanced Monitoring.
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Analyze My Answer — FreeAccording to DataEngPrep.tech, this is one of the most frequently asked Cloud/Tools interview questions, reported at 1 company. DataEngPrep.tech maintains a curated database of 1,863+ real data engineering interview questions across 7 categories, verified by industry professionals.