Salesforce Software Engineer Interview Questions

I would describe the problem, my role, the hardest part, and how I solved it. Then I would explain the trade-offs I made and the impact of the result. A strong answer is specific, concise, and shows ownership.

I would use a hash map for quick lookup and a doubly linked list to track usage order. That gives constant-time updates and eviction when the cache reaches capacity. The key is combining fast access with fast reordering.

I would look at selectivity, indexing, filters, and whether the query is returning more data than it needs. Then I would narrow the query path and reduce expensive scans or joins. A good answer shows that you measure first and optimize the real bottleneck.

I would break the pipeline into stages so ingestion, processing, and storage can scale independently. Then I would use queues, retries, and monitoring to keep the system reliable under load. The design should prioritize throughput without sacrificing correctness.

MVC separates data, presentation, and interaction into different responsibilities. That makes code easier to maintain, test, and extend because each part has a clearer purpose. The main benefit is cleaner structure as the application grows.