Scenario-Based
Questions
Navigate complex architectural puzzles. Learn sharing rule boundaries, setup vs non-setup DML conflicts, and integration callout patterns.
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What are Scenario-Based Salesforce Interview Questions?
Scenario-based questions evaluate an engineer's capability to solve complex, multi-layered architectural issues on the Salesforce platform. These questions test knowledge of transaction boundaries, security sharing rule overrides, mixed DML limits, integration concurrency, and large data volume (LDV) constraints.
Architectural Solver Guidelines
- •Mixed DML Resolution: Decouple setup (Users, Groups) and non-setup (Accounts, Contacts) updates using asynchronous boundaries.
- •Integration Lockouts: Use Continuation objects in LWC or Queueable jobs to make HTTP calls without locking synchronous threads.
- •Selectivity & Indexing: Prevent 'non-selective query' errors on large tables by filtering on indexed custom fields.
With Sharing vs. Without Sharing in Apex
Enforces the calling user's record-level sharing access rules. Best practice for user-facing actions.
Ignores the calling user's sharing rules (system mode). Used to perform global processing or admin logs.
Scenario Pillars.
Senior developers are judged on their ability to design robust solutions for complex system state conflicts.
Mixed DML Operations
Handling transaction conflicts when updating setup and non-setup objects in a single thread.
Sharing & Security
Designing secure record visibility schemes across complex, multi-layered role hierarchies.
Integration Quotas
Building API interfaces that scale cleanly without exhausting platform daily callout limits.
System Architecture Scenarios
How do you resolve a Mixed DML Exception in a trigger context?
"I split the code into separate classes and call them one after the other in my trigger handler."
A Mixed DML Exception occurs when a single transaction block updates both setup objects (like User, Group) and non-setup objects (like Account, Contact). To resolve it, you must execute one of the DML operations asynchronously. By moving the setup or non-setup object update into an @future method, a Queueable class, or publishing a Platform Event, you yield the execution thread, allowing the second DML operation to run in a separate transaction boundary.
How do you design a secure data access model for external partner users in Experience Cloud?
"I use standard sharing rules and assign the partner users to the internal role hierarchy."
Experience Cloud partner users use External Sharing Models. You first enable 'External Sharing Model' in sharing settings. For high-volume portal users who cannot belong to standard hierarchies, you configure 'Sharing Sets' to grant record access based on matching Contact or Account lookups. For Partner licenses, you manage Partner Role Hierarchies (supporting up to 3 roles per account) and configure 'Share Groups' to share records owned by portal users back to internal staff.
Frequently Asked Questions
What is a setup object in Salesforce?
How do platform events bypass Mixed DML limits?
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