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What are the limitations of Flow that might lead you to choose Apex instead?

Leave a Comment / Interview Preparation /

Salesforce Flow is a powerful tool for automating business processes with minimal or no code. However, it has several limitations that might lead you to use Apex instead – 1. Complex Business Logic Flow Limitation: Difficult or impossible to implement complex logic such as deeply nested if/else statements, recursion, or advanced calculations. Why Choose Apex: […]

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Explain Queueable vs Batch vs Future – which would you use to process 5M records and why

Leave a Comment / Interview Preparation /

Future, Queueable, Batch — Key Differences 1. Future Methods 2. Queueable Apex 3. Batch Apex Scenario: Processing 5 Million Records To process 5 million records, I would use Batch Apex. Future and Queueable are good for smaller jobs, but they can’t handle millions of records because of governor limits. Batch Apex is designed for this

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Difference between @wire, LDS, and Imperative Apex calls in LWC – and real use cases

Interview Preparation, LWC /

This is one of the most frequently asked in Salesforce Developer interviews and also key in real-world Salesforce dev work. Let’s break it down in a simple but detailed way with use cases. 1. @wire (Reactive, Declarative) Example- Use cases – 2. LDS (Lightning Data Service) Example- Use cases 3. Imperative Apex Calls (Programmatic) Example-

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How do you optimize a SOQL query that is hitting governor limits with large data

Interview Preparation /

When a SOQL query hits governor limits (like 50,000 record limit or too many queries in one transaction), you need to optimize it. Here are some strategies: Ways to Optimize SOQL Queries 1. Use Selective Queries (Filters) – 2. Use LIMIT & ORDER BY – Always limit the number of records if you don’t need

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How do you handle Mix DML errors when creating Users & Accounts in the same transaction?

Interview Preparation /

In Salesforce, Mix DML error happens when you try to perform DML on setup objects (like User, Profile, PermissionSetAssignment, etc.) and non-setup objects (like Account, Opportunity, etc.) in the same transaction. So if you create a User and an Account in the same transaction, you’ll hit a MIXED_DML_OPERATION error. Why the Mixed DML Error Occurs?

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Write a trigger that updates the Account ‘Number of Opportunities’ field when an Opportunity is inserted, updated, or deleted.

Trigger Scenarios /

This Apex trigger ensures that the custom field Number_of_Opportunities__c on the Account object always reflects the current number of related Opportunity records. It runs after insert, update, and delete operations on Opportunity. Trigger- Apex class-

Write a trigger that updates the Account ‘Number of Opportunities’ field when an Opportunity is inserted, updated, or deleted. Read More »

When a custom object is created in Salesforce, how many associated objects are automatically created

2 Comments / General Knowledge, Interview Preparation /

When you create a custom object in Salesforce, Salesforce does automatically generate a few related system objects behind the scenes- Suppose a custom object named Test_Obj is created. The following system objects might also be generated automatically: Test_Obj__ChangeEvent, Test_Obj__History, and Test_Obj__Share. However, the creation of these system objects depends on specific conditions, such as whether

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The major differences between Queueable and Batch Apex in Salesforce

Leave a Comment / Interview Preparation /

Batch Apex Batch Apex is designed for processing large volumes of data by dividing the workload into smaller, manageable batches. It’s implemented by defining a class that implements the Database.Batchable interface, with the required start, execute, and finish methods Advantages: Governor Limits Reset per Batch-Each batch runs in its own transaction, which means governor limits

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Write a trigger to update a field on a child record to a default value if the child record is the only child of the parent.

394 Comments / Trigger Scenarios /

Let’s say – The parent object is Account, The child object is Contact, We want to update the child field Status__c to ‘Primary’ only if that contact is the only contact related to the parent Account. Trigger: Key Concepts:

Write a trigger to update a field on a child record to a default value if the child record is the only child of the parent. Read More »

How to Count Contacts on Each Account Using Trigger

Trigger Scenarios /

Count related contacts on each Account in Salesforce using a custom Apex Trigger. A simple solution for real-time rollups. This trigger runs after insert, update, or delete operations on the Contact object. It collects all relevant Account IDs and queries the number of Contacts for each, updating a custom field called Number_of_Contacts__c on the Account. This approach

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