500+ Salesforce Developer Interview Questions and Answers

Trigger to update Opportunities when an Account is modified in Salesforce.

• Use 'after update' trigger on Account object to capture changes.

• Query related Opportunities using 'SELECT Id FROM Opportunity WHERE AccountId = :Trigger.newMap.keySet()'.

• Update Opportunity fields based on Account changes, e.g., Account Name.

• Use 'update' DML operation to save changes to Opportunities.

Trigger to update contact when accounts phone changed

• Create a trigger on Account object

• Query for related Contacts

• Update Contact phone field with Account phone field value

Child records can be made read-only when parent record's field is updated using validation rules.

• Create a validation rule on child object

• Use ISCHANGED() function to check if parent field is updated

• Use PRIORVALUE() function to get the previous value of parent field

• Use ISBLANK() function to check if the previous value of parent field is blank

• Use ISNEW() function to allow creation of child records

• Use OR() function to combine all conditions

• Throw an error message if all conditions...read more

There are multiple ways to write asynchronous code in Salesforce.

• Using @future annotation

• Using Queueable interface

• Using Batch Apex

• Using Platform Events

• Using Asynchronous Apex REST Callouts

To call a controller method from JavaScript in a Visualforce page, use the actionFunction tag.

• Create a controller method in the Apex class.

• Add an actionFunction tag in the Visualforce page.

• Call the actionFunction from JavaScript using its name.

• Pass parameters to the controller method using the actionFunction tag.

• Use the rerender attribute to update the page after the controller method is called.

Use data loader's parent-child functionality to load both parent and child records at once.

• Create a CSV file with both parent and child records

• Use the data loader's parent-child functionality to map the relationship between the two

• Ensure that the parent records are loaded before the child records

• Use the data loader's insert or upsert operation to load the data

Batch class is used to process large data sets in chunks. Stateful interface maintains state between batches.

• Batch class implements Database.Batchable interface

• It has three methods: start(), execute() and finish()

• Stateful interface is used to maintain state between batches

• Stateful variables can be declared outside of the execute() method

• Example: Batch class to update all accounts with a specific field value

Python provides a built-in method to remove leading whitespaces from a string.

• Use the lstrip() method to remove leading whitespaces from a string.

• lstrip() method removes all whitespaces from the beginning of the string.

• Example: string = ' Hello World' string.lstrip() Output: 'Hello World'

Answers to Salesforce Developer interview questions

• 1. Use trigger.new to get the updated account records and update the related contact detail field

• 2. Governor limits are the limits set by Salesforce to ensure efficient use of resources and prevent abuse

• 3. Relationship in Salesforce refers to the association between two objects

• 4. Lookup relationship is a type of relationship where one object has a reference to another object

• 5. Custom object is an object created by the user to...read more

Batch code to update account rating

• Create a batch class implementing Database.Batchable interface

• Query for accounts with specific criteria

• Update the rating field for each account

• Execute the batch class using Database.executeBatch method

Salesforce offers various types of integration options to connect with external systems.

• SOAP API: Allows integration with external systems using SOAP protocol.

• REST API: Enables integration with external systems using RESTful web services.

• Bulk API: Facilitates integration for large data volumes using batch processing.

• Streaming API: Provides real-time integration by pushing data updates to external systems.

• Outbound Messaging: Sends notifications to external systems using SOAP o...read more

SOQL query to find player 'Virat Kohli' in team 'India' using parent-to-child relationship.

• SOQL (Salesforce Object Query Language) is used to query Salesforce data.

• In a parent-to-child relationship, you can query child records using a subquery.

• The query structure for this scenario would be: SELECT Id, (SELECT Id FROM Players__r WHERE Name = 'Virat Kohli') FROM Team__c WHERE Name = 'India'.

• Ensure that 'Players__r' is the correct relationship name for the child object in your S...read more

Trigger to ensure only one primary contact per account in Salesforce.

• Use a before insert trigger to check for existing primary contacts.

• Query the Account object to find if a primary contact exists.

• If a primary contact is found, add an error to the contact record.

• Use a Set to track account IDs for efficient lookups.

• Example: 'if (existingContacts.size() > 0) { contact.addError('Already present'); }'

To handle more than 50K records fetched by SOQL in trigger, use batch apex or pagination.

• Use batch apex to process records in smaller chunks

• Implement pagination to limit the number of records fetched at a time

• Consider using selective SOQL queries to reduce the number of records fetched

• Avoid using SOQL queries inside loops

• Use query optimizer tool to optimize SOQL queries

To create a 1 to 1 relationship in Salesforce, use a lookup field on the child object pointing to the parent object.

• Create a lookup field on the child object that references the parent object.

• Ensure that the lookup field has a unique constraint to enforce the 1 to 1 relationship.

• Use validation rules or triggers to prevent multiple child records from being linked to the same parent record.

Code to create a star pattern

• Use nested loops to print the pattern

• The outer loop controls the number of rows

• The inner loop controls the number of stars to print in each row

• Use a combination of spaces and stars to create the pattern

In Apex, security is enforced by default. If a user doesn't have access to a field, they won't be able to query it.

• In Apex, security is enforced by default, meaning that users can only access data they have permission to see.

• If a user doesn't have access to the Phone field in the Account object, they won't be able to query it even with WITH_SECURITY_ENFORCED.

• The SELECT id, Name, Phone from Account WITH_SECURITY_ENFORCED query will only return the id and Name fields for users ...read more

Standard objects and how to insert data in Salesforce

• Standard objects are pre-built objects in Salesforce such as Account, Contact, Lead, etc.

• Data can be inserted into Salesforce using Data Loader, Apex Data Loader, or through API calls

• Data can also be inserted manually through the Salesforce UI

• Data can be inserted in bulk or one record at a time

Yes, we can use trigger.new() in before & after trigger.

• In before trigger, trigger.new() returns the records that are about to be saved.

• In after trigger, trigger.new() returns the records that have been saved.

• We can use trigger.new() to access and manipulate the records in the trigger context.

APEX CPU Limit Exceeded error happens when code consumes too much CPU time. Best practices include optimizing code, reducing loops, and using asynchronous processing.

• Avoid using nested loops and optimize code for better performance

• Use asynchronous processing like @future or Queueable to offload CPU intensive tasks

• Limit the use of SOQL queries inside loops to reduce CPU consumption

Decorators in LWC are used to modify the behavior of a component. Data passing between LWC components can be done using properties and events. Salesforce Sales and Service Cloud are CRM platforms. Order of execution in Salesforce refers to the sequence in which operations are performed. Deployment in Salesforce is done using tools like Salesforce DX. Case management process involves tracking and resolving customer issues. Salesforce integration allows different systems to com...read more

Trigger context refers to the execution context of a trigger in Salesforce.

• Trigger context provides information about the record(s) that caused the trigger to execute.

• It includes details like the trigger event type, the old and new versions of the records, and the user who caused the trigger to execute.

• The trigger context is accessed using the Trigger class in Apex.

• Example: Trigger context can be used to perform specific actions based on the type of trigger event, such as bef...read more

SOQL query to fetch description field from Account and reason for inability to filter

• SOQL query: SELECT Description FROM Account

• Description field is not filterable because it is a long text field

• Long text fields cannot be filtered in SOQL queries

Write a trigger to update the description field on the parent object when the grandchild object is updated.

• Create a trigger on the grandchild object

• Use a SOQL query to retrieve the parent object

• Update the description field on the parent object with the grandchild's description

Trigger to assign or create a Test Account for Contacts without an associated Account.

• Use an 'after insert' trigger on the Contact object.

• Query for existing 'Test Account' to avoid duplicates.

• If no Account is associated with the Contact, assign the existing 'Test Account'.

• If no 'Test Account' exists, create one and associate it with the Contact.

• Ensure to handle bulk inserts to avoid governor limits.

Flows can be invoked using other flows and Apex. Apex classes can be invoked from a flow by using invocable methods and passing variables as input parameters.

• To invoke a flow from another flow, use the 'Launch Flow' element in the Flow Designer.

• To invoke an Apex class from a flow, create an invocable method in the Apex class and annotate it with @InvocableMethod.

• Pass variables from a flow to an Apex class by defining input parameters in the invocable method.

• In the flow, use t...read more

Bulkify a trigger to count child records and update parent records efficiently in Salesforce.

• Use a Map to store parent records and their corresponding child counts.

• Query all relevant child records in a single SOQL query to avoid governor limits.

• Iterate through the child records and populate the Map with counts.

• Update the parent records in bulk after processing all child records.

• Example: If a parent Account has multiple Contacts, count them and update a custom field on the Acc...read more