The ultimate technical interview prep guide for AWS, Azure, GCP, and Oracle Cloud.
A: Cloud providers secure the infrastructure (hardware/data centers), while customers secure data, identity, OS, and application-level configurations.
A: For unstructured data like images, videos, backups, and logs with high durability and low cost.
A: To isolate backend resources (like databases) from direct internet access, significantly improving security.
A: Roles avoid long-lived credentials and improve security by providing temporary access via security tokens.
A: When massive horizontal scalability, flexible schema, and high write throughput are primary requirements.
A: Eliminates manual configuration drift and enables repeatable, version-controlled infrastructure provisioning.
A: RTO = maximum downtime allowed (recovery speed); RPO = maximum data loss allowed (time since last backup).
A: Right-size underutilized resources and immediately terminate or shut down unused services.
A: Clarify requirements: scale (DAU/MAU), expected availability, latency requirements, and data consistency needs.
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