The correct answer is Designing and coding application business logic and user interface components.

Database administrators for cloud data services focus on operational duties such as schema design, query tuning, capacity planning, security, backups and recovery. Application business logic and user interface work belong to application developers and product teams, so Designing and coding application business logic and user interface components is not typically a DBA responsibility.

Monitoring database performance and managing resource utilization is a central DBA responsibility. DBAs monitor query performance, tune indexes, and manage instance sizing or autoscaling policies to meet performance and cost objectives.

Configuring Google Cloud IAM roles and project level access policies is often part of a DBA role when it concerns database access and permissions. DBAs define who can connect to and manage databases and they work with cloud administrators to apply appropriate IAM roles.

Scheduling backups and orchestrating disaster recovery procedures is a standard DBA duty. DBAs implement backup schedules, test restore procedures, and configure replication and failover to meet recovery objectives.

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