Oracle & Salesforce: AI / ML Engineer

def is_rotation(a: str, b: str) -> bool:
    return len(a) == len(b) and b in (a + a)

print(is_rotation("waterbottle", "erbottlewat"))  # True

• Every rotation of a is a substring of a + a. That is O(n) with KMP, and Python's in is efficient in practice.

def same_tree(p, q):
    if not p or not q: return p is q
    return p.val == q.val and same_tree(p.left, q.left) and same_tree(p.right, q.right)

• O(n) time, O(h) recursion depth. For "structure only", drop the value comparison.

SELECT e.name AS employee, m.name AS manager
FROM employees e
LEFT JOIN employees m ON m.emp_id = e.manager_id;

• A self-join joins a table to itself with aliases. Use LEFT JOIN so the CEO (no manager) still appears. A follow-up asks for employees who earn more than their manager: add WHERE e.salary > m.salary.

• RAG grounds LLM answers in retrieved enterprise data, which reduces hallucination and keeps answers current.
• CRM uses:
• A service agent answers cases from knowledge articles and past resolutions.
• Sales gets account summaries from opportunities, emails and calls.
• Field-service troubleshooting.
• Trust layer: respect record-level sharing rules at retrieval, mask PII before the LLM, apply zero-data-retention with the model provider, log audits, and filter toxicity. Cite the source records.

• Online metrics: business KPIs (case deflection, conversion), user feedback, latency and error rates, cost per request.
• Model health: input and output drift, prediction-distribution shifts, data-quality checks, performance on delayed labels.
• LLM-specific: sampled LLM-judge scores (faithfulness, helpfulness), refusal and toxicity rates, prompt-injection attempts, retrieval hit rate.
• Process: dashboards, alerts against SLOs, shadow and canary releases, periodic re-evaluation on a golden set, rollback plans.

• Stay positive and forward-looking: "I've built strong foundations in X at my current company. I'm looking for larger-scale AI problems, like the OCI GenAI services and AI features in Oracle Database (vector search, Select AI), where I can work closer to the platform."
• Avoid criticising your current employer. Connect your skills to the team's work.
• Have a clear expected salary range, based on research, ready.