Explanation
The Architect should determine the data access prevention requirements and then identify the system constraints before recommending a solution. The data access prevention requirements are the business rules and policies that define how to prevent deactivated employees from accessing Salesforce data. For example, the Architect should determine whether the HR system can send a notification to Salesforce when an employee is deactivated, or whether Salesforce needs to query the HR system periodically to check the employee status.
The system constraints are the technical limitations and challenges that may affect the integration solution. For example, the Architect should determine whether the HR system supports outbound or inbound integration, what are the security and authentication protocols, what are the data formats and protocols, and what are the performance and scalability requirements. The frequency of the integration is not as important as the requirements and constraints, as it can be adjusted based on the business needs and technical feasibility. The data volume requirements and loading schedule are not relevant for this scenario, as they are more applicable for data migration or replication scenarios.