MuleSoft Integration Foundations Advanced Practice Exam: Hard Questions 2025

A retail company exposes a Process API that orchestrates calls to three System APIs (Orders, Inventory, Loyalty). During peak traffic, the Inventory System API intermittently returns HTTP 503 and recovers within 30–90 seconds. The business requirement is: avoid amplifying downstream outages, keep response times predictable for consumers, and prevent duplicate order submissions. Which design is the BEST fit?

A team is standardizing APIs across business units. They need to publish reusable assets (RAML specs, connectors, examples) with clear versioning and dependencies, and they want consumers to discover and self-serve these assets. Which MuleSoft platform capability BEST supports this requirement?

A financial services integration must process payments in near real time. The upstream system sometimes retries requests when it does not receive a response quickly. The Mule application calls a downstream core banking API that is not idempotent. The integration must ensure exactly-once business processing semantics (no duplicate payments) even under retries and transient failures. Which approach is MOST appropriate?

An organization needs to expose an API to partners. Requirements include: strong authentication, fine-grained authorization, threat protection (rate limiting/spike control), and the ability to apply policies consistently across environments without changing application code. Which is the BEST solution approach on the MuleSoft platform?

A logistics company is designing an API-led architecture. Multiple experience channels (web, mobile, partner) need consistent access to shipment data. The shipment system of record is being replaced in 6 months, and the company wants to minimize impact to consumers during the transition. Which architecture BEST supports this goal?

A Mule application uses an HTTP Request to call an external service. In production, intermittent failures occur with 'Connection refused' and the error rate spikes during deployments. The external service is stable. Which troubleshooting step is MOST likely to identify the root cause on the Mule side?

A company must integrate a CRM with an ERP. The ERP can only handle 50 requests per minute and experiences brownouts if exceeded. The CRM produces bursts of updates (thousands in minutes). The business accepts eventual consistency but requires that all updates are eventually processed without loss. Which integration pattern is BEST?

A team is deploying Mule applications to CloudHub. They need safe, repeatable deployments across dev/test/prod with environment-specific properties (endpoints, credentials) and minimal manual steps. They also want the ability to roll back quickly if an issue is detected. Which approach BEST meets these needs?

An API exposes customer profile data. A consumer reports that they are receiving HTTP 200 responses with empty payloads, but only when requesting certain customers. The logs show no errors. The API uses a DataWeave transformation to map from the System API response to the Experience API contract. What is the MOST likely cause and BEST next step?

A company wants to standardize how teams publish APIs so that contracts are discoverable, governed, and can be tested by consumers before implementation is complete. They also want to reduce rework caused by late contract changes. Which practice BEST aligns with these goals?