Are you preparing for a Salesforce Developer or Admin interview?
Good news 👉 I’ve collected 20 of the most commonly asked Salesforce interview questions along with updated answers, real-time examples, and tips.

Whether you’re a fresher or experienced, this guide will help you crack interviews with confidence.

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1️⃣ What is the difference between Workflow, Process Builder, and Flow?

Answer:

• Workflow: Old automation tool, supports only field updates & email alerts. (Now deprecated)
• Process Builder: More powerful (multi-step automation), but also deprecated.
• Flow: The future of automation – supports before/after save triggers, screen flows, callouts, subflows, etc.

💡 Tip: Always say you prefer Flow in new projects since Salesforce announced Workflow & Process Builder retirement.

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2️⃣ How do you prevent recursion in Apex triggers?

Answer:
Use a static Boolean variable in a helper class.
Example:

public class TriggerHandler {
    private static Boolean runOnce = true;
    public static void handleTrigger(List<Account> accounts) {
        if(!runOnce) return;
        runOnce = false;
        // business logic here
    }
}

💡 Tip: Interviewers want to see if you understand best practices in trigger frameworks.

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3️⃣ Explain @wire vs imperative Apex in LWC.

Answer:

• @wire: Reactive, automatically refreshes when data changes. Best for read-only fetches.
• Imperative: Manual call. Best for conditional logic, DML, callouts.

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4️⃣ What is a Mix DML error and how to handle it?

Answer:
Occurs when setup & non-setup objects (e.g., User + Account) are modified in the same transaction.
✅ Fix: Move one DML into @future or Queueable Apex.

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5️⃣ Difference between SOQL and SOSL?

SOQL: Query specific objects/fields, returns structured results.
SOSL: Full-text search across multiple objects, returns records from different objects.

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6️⃣ Future vs Batch vs Queueable vs Scheduled Apex

• Future: Simple async, no chaining.
• Queueable: Async + chaining, flexible.
• Batch: Handles 50M records in chunks.
• Scheduled: Time-based execution (e.g., nightly jobs).

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7️⃣ How do you handle bulk DML in triggers?

• Always bulkify code with collections (List, Map, Set).
• Never put SOQL/DML inside a loop.
• Use Trigger.new/oldMap.

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8️⃣ What is Lightning Data Service (LDS) in LWC?

• CRUD without Apex.
• Handles security & FLS automatically.
• Use when simple record fetch/update is needed.

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9️⃣ Can Flow replace Apex triggers?

• For simple updates/validations → Yes.
• For complex logic, recursion control, callouts, or huge data → Apex is better.

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🔟 Explain Test.startTest and Test.stopTest.

• Creates a fresh governor limit context.
• Runs async methods (future, batch, queueable).

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1️⃣1️⃣ 15-digit vs 18-digit Salesforce IDs

• 15-digit: Case-sensitive (UI).
• 18-digit: Case-insensitive (API-safe).

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1️⃣2️⃣ Calling Apex method from Flow

• Use @InvocableMethod annotation.
• Input/Output must be List-based wrapper classes.

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1️⃣3️⃣ Trigger Context Variables

• Trigger.new, Trigger.old, Trigger.newMap, Trigger.oldMap,
• Trigger.isInsert, isUpdate, isDelete, isBefore, isAfter, etc.

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1️⃣4️⃣ Explain @AuraEnabled annotation

• Makes Apex accessible from LWC/Aura.
• @AuraEnabled(cacheable=true) → best for read-only methods.
• Without cache → for DML operations.

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1️⃣5️⃣ How to schedule a batch job daily at 2 AM?

System.schedule('Daily Batch', '0 0 2 * * ?', new MyBatchClass());

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1️⃣6️⃣ What are Governor Limits?

Salesforce’s way to protect multi-tenant environment:

• SOQL: 100 queries
• DML: 150 statements
• CPU: 10 seconds
• Heap size, etc.

💡 Tip: Always mention “Bulkification & best practices help avoid hitting limits.”

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1️⃣7️⃣ SOQL for parent-child relationship

• Parent → Child:

SELECT Name, (SELECT LastName FROM Contacts) FROM Account

• Child → Parent:

SELECT Id, Account.Name FROM Contact

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1️⃣8️⃣ What is a Wrapper Class?

A custom class to wrap multiple fields/objects into a single structure.
✅ Used in batch processing, LWC, VF tables, checkboxes.

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1️⃣9️⃣ Salesforce Order of Execution

Validation → Before Triggers → Custom Validation → After Triggers → Assignment Rules → Workflow → Process Builder → Flow → Commit.

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2️⃣0️⃣ Explain Continuous Integration (CI) in Salesforce

CI automates builds & deployments using GitHub, Jenkins, Bitbucket, or Copado.
Ensures code quality, collaboration, and faster releases.

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🔑 Final Takeaway

👉 If you can confidently answer these 20 Salesforce interview questions with examples and code, you’ll stand out in interviews.
👉 Don’t just memorize definitions – explain scenarios where you’d use Flow, Apex, LWC, or integrations.

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