If you’re preparing for a Salesforce Flow interview questions session whether for an Admin, Developer, or Consultant role .You’re in the right place. With Salesforce retiring Workflow Rules and Process Builder, mastering Flow has become essential. This article covers the 35 most commonly asked Salesforce Flow interview questions, with detailed answers and real-world examples to help you succeed.
1. What is Salesforce Flow?
Salesforce Flow is a powerful tool that allows users to automate business processes without writing code. You can think of it as a drag-and-drop interface that lets you design logic visually. Whether you’re guiding a user through a form, updating records automatically, or integrating with external systems, Flow is your go-to tool.
Real Example: Automatically assign a lead to the correct sales rep based on the lead’s region.
2. What are the types of Flows in Salesforce?
- Screen Flow – Designed for interactive processes that require user input. Think of forms or wizards.
- Record-Triggered Flow – Automatically runs when a record is created, updated, or deleted.
- Auto-Launched Flow – Background flows triggered from Apex, another flow, or process.
- Scheduled-Triggered Flow – Runs at set times or intervals (daily, weekly, etc.).
- Platform Event-Triggered Flow – Fires in response to platform events (useful in real-time integrations).
There are more standard types of flow added in recent days . You can checkout here : Click here
3. What’s the difference between Before-Save and After-Save Flows?
- Before-Save Flows (Fast Field Updates ) run before a record is saved to the database. They’re lightning-fast and ideal for updating fields without triggering extra automation.
- After-Save Flows (Action and Related Records) occur after the record is saved. Use these when you need to create related records, send notifications, or perform DML operations.
4. When should you use Flow instead of Apex?
Flows are best for:
- Simple to moderately complex logic
- Scenarios where admins need to maintain automation
- Avoiding code heavy implementations
Use Apex when:
- You require deep control over transactions
- You need loops with complex calculations
- You’re handling large volumes (batchable jobs)
5. Can a Flow delete records?
Yes !!!!!!! Using the “Delete Records” element, you can delete one or multiple records. This is useful for cleanup operations, like removing stale(unwanted) data automatically.
6. How do you schedule a Flow to run weekly?
Use a Scheduled-Triggered Flow, choose a One , Daily or weekly interval, and define the specific day and time.
7. What is a Subflow?
A Subflow is a reusable Flow that can be called from another Flow. This promotes modularity and reusability. For example, you could create a Subflow to send an email and use it across multiple parent Flows.
8. How do you handle errors in Flows?
- Use Fault Paths to define what should happen when an element fails.
- Send email alerts to admins.
- Log errors into a custom object for historical analysis.
9. What’s the purpose of Loops in Flows?
Loops let you go through a collection of records one at a time. You can update, evaluate, or perform actions on each item. Think of mass updating all contacts under an Account. Loop is same what we use “for” in Apex .
10. Best practices to optimize Flow performance?
- Always filter Get Records to minimize queries.
- Never use DML inside loops – use collections and process after the loop.
- Use Scheduled Paths for time-based actions.
- Minimize elements in a single Flow version.
11. Scenario: Auto-assign Cases with High Priority
Create a Before Save Record-Triggered Flow:
- Entry condition: Case Priority = High
- Action: Assign to Queue
12. Scenario: Prevent Deletion of “Working” Leads
Use a Before Delete Flow:
- Check the lead’s status
- If status = “Working,” display a custom error to block deletion
13. Can you have multiple Scheduled Paths in a single Flow?
Yes, Salesforce allows multiple Scheduled Paths in one Flow, each with its own delay and criteria.
14. Can you dynamically create records based on user input in Screen Flows?
Yes! Screen Flows support dynamic record creation using user inputs.
How it works:
- Use Screen elements to collect data (e.g., multiple contacts).
- Use Loops + Assignment to store multiple inputs in a Collection Variable.
- Use a Create Records element to create all records at once from the collection.
15. What are Entry Conditions in Flows?
These are filters that determine whether the Flow should run at all. Helps reduce performance overhead and prevent unwanted triggers.
16. What is Flow Orchestration?
Flow Orchestration allows you to build complex, multi-step business processes involving multiple users and approvals. You can define Stages, Steps, and Subflows perfect for HR onboarding, case escalation and other multi-step business use cases.
17. How do you debug a Flow?
- Use the Debug option in Flow Builder
- Use Apex Log Analyzer in VS Code for Deep Analysis
- Check Flow logs via the Flow Interview section
- Setup Debug Logs and Check Debug Output
- Check Failed and Paused Flow Interviews from Setup
- Check Error Email Notifications from Process Automation Settings
Here is the detailed article step by step to debug a complex flow also : Click here
18. What are Scheduled Paths?
Scheduled Paths delay part of a Flow to run minutes, hours, or days after a record is created or updated. Use it for follow-ups or delayed emails.
19. Can Flows send Outbound Messages?
Yes We can , especially useful for integrations. Use After-Save Flows and select the Outbound Message action.
20. Can you call Apex in a Flow?
Yes !!!!!. Use an Apex Action and reference a class with the @InvocableMethod annotation. Great for when you need logic that Flow can’t handle directly.
21. What is Flow Trigger Explorer?
A visual map to view all Record-Triggered Flows on an object. Helps you troubleshoot trigger order and dependencies easily.
22. Common Flow Errors & Prevention Tips
- DML in Loops → Avoid, batch your records
- Missing field values → Use Decisions to check for nulls
- Recursion → Set proper entry criteria and limits
- Missing Fault Paths: Always use fault paths to log errors or send alerts.
- Null Value Errors:Add decision elements to check for null before using variables
- SOQL Limits Hit: Too many SOQL queries
- Incorrect Element Order: Carefully map flow logic; test each path before deploying.
There could be more Error scenerio , We will publish an detailed article for the same shortly .
23. How do you track Flow failures?
- Use Collections: Add records to a collection variable and perform DML operations once outside the loop.
- Avoid DML/GET inside loops: Never use Create, Update, Delete, or Get Records inside a loop.
- Filter Get Records: Always use filters to retrieve only the needed data.
- Scheduled Paths: Use for non-critical tasks like sending emails to reduce load.
- Subflows: Modularize logic to improve performance and reuse functionality.
- Enable Error Email Alerts
- Use a custom Logging Object
- Analyze error messages in Flow Interviews
24. What if multiple Flows fire on the same object?
Salesforce executes them based on trigger type (Before/After) and their order (defined in Flow Trigger Explorer). Order matters!
Also we can define order from Flow –> Setting –> Advanced -> Triggering Order.
25. What is the Pause Element?
Used to temporarily stop Flow execution until a user action or condition is met. Common in approval processes and Flow Orchestration.
26. How do you bulkify a Flow?
- Use Collection Variables: Gather multiple records into a collection and perform DML operations (Create, Update, Delete) in bulk.
- Avoid DML Inside Loops: Move your data operations (like Create/Update) outside the loop to avoid hitting governor limits.
- Loop Smartly: Use loops to process records but store results in a collection variable instead of doing actions immediately.
- Use Assignment Elements Effectively: Assign values inside loops and push them to collections for bulk processing after the loop ends.
- Use Fault Paths for Error Handling : Catch errors and log them, especially in bulk operations, to ensure smooth execution.
- Governer Limit : While creating flow keep in mind about limits
27. How do you deploy a Flow?
- Use Change Sets or Salesforce CLI
- Activate the Flow post-deployment
- Validate in Sandbox first
- Use vs code
- Use Metadata Api
28. Flow vs Workflow Rule vs Process Builder
| Feature | Workflow Rule | Process Builder | Flow |
|---|---|---|---|
| Status | Deprecated | Deprecated | Supported |
| Use Case | Basic updates | Moderate logic | Complex logic |
| UI Complexity | Simple | Medium | Advanced |
| Future Recommendation | ❌ | ❌ | ✅ |
29. Can Flows be versioned?
Yes. Every time you activate a Flow, Salesforce creates a new version. You can roll back to previous versions or track changes.
Click here to know about maximum number of active version of flow in all editions .
30 .What is the maximum number of DML statements allowed in a single Flow transaction?
Salesforce allows up to 150 DML statements in a single transaction, whether they are triggered via Apex or Flow. A DML statement refers to actions like Create, Update, Delete, and Upsert.
31. What is the limit on the number of elements in a Flow?
There is a 2,000-element execution limit per Flow interview. This means Salesforce will stop the Flow if it tries to execute more than 2,000 Flow elements (e.g., Assignments, Decisions, Loops, DML actions) in one run.
32. How many total Flow interviews can run concurrently per org?
Salesforce allows a maximum of 2,000 Flow interviews to be executed concurrently across an org.
33. Are there any limits on Scheduled Flows?
Yes. Salesforce imposes a daily limit of 250,000 scheduled Flow interviews per 24 hours, or the number of user licenses multiplied by 200, whichever is lower.
Example:
If your org has 1,000 licenses, the scheduled Flow execution limit would be 1,000 × 200 = 200,000 per day.
34.How many records can you retrieve using the “Get Records” element?
By default, the “Get Records” element retrieves only the first record unless you check the option to store all records. When storing all records, the number retrieved is limited by the SOQL row limit, which is 50,000 rows per transaction.
35 . Some Common limit In Flow
Here are some Salesforce official limit that you can go through
General Flow Limits : Click here
Per-Transaction Flow Limits : Click here
Flow Usage-Based Entitlements : Click here
Summary
Mastering Salesforce Flow will set you apart in any interview or project. These questions aren’t just theoretical—they reflect real-world business needs. Whether you’re automating lead assignment or building orchestration for onboarding, Flow is your ultimate tool.
Keep practicing, building, and exploring on SalesforceHours for more advanced tutorials, downloadable Flow templates, and mock interview guides.
