TCS Senior Salesforce Developer Interview Questions, Process, and Tips

Promise is an object representing the eventual completion (or failure) of an asynchronous operation, and promiseAll is a method that takes an iterable of promises and returns a single Promise that resolves when all of the promises have resolved.

• Promise is used in JavaScript to handle asynchronous operations.

• It represents a value that may not be available yet, but will be resolved at some point in the future.

• PromiseAll ...read more

Connection from Mulesoft to Salesforce is done using Salesforce Connector in Mulesoft Anypoint Platform.

• Use Salesforce Connector in Mulesoft Anypoint Platform to establish connection

• Authenticate using Salesforce credentials (username, password, security token)

• Utilize Salesforce APIs to interact with Salesforce data

Connected App, remote site settings, and OAuth are key components in Salesforce for enabling secure external access to Salesforce data and functionality.

• Connected App is a framework that enables external applications to securely integrate with Salesforce using APIs.

• Remote Site Settings allow Salesforce to make callouts to external services over HTTPS.

• OAuth is an open standard for access delegation, commonly used in Sal...read more

Best practices in Trigger and trigger events

• Best practices include bulkifying triggers, using helper classes, and limiting logic in triggers

• Trigger events are before insert, before update, after insert, after update, etc.

• Examples of trigger events include before insert, after update, etc.

Rollup summary field is a field in Salesforce that calculates values from related records and displays the result on a parent record.

• Rollup summary fields are used to perform calculations on child records and display the result on a parent record.

• They can be used to calculate the sum, count, minimum, or maximum of a field in related records.

• For example, a rollup summary field can be used to calculate the total amount o...read more

With and without sharing in Salesforce determines whether sharing rules are enforced for a class.

• With sharing keyword enforces sharing rules, restricting access to records based on the user's profile and organization-wide defaults.

• Without sharing keyword does not enforce sharing rules, allowing full access to all records regardless of the user's profile or organization-wide defaults.

Future is asynchronous and runs in a separate thread, while Queueable Apex runs in the same thread but can be queued for execution.

• Future methods are used for executing code asynchronously, while Queueable Apex is used for chaining jobs and running them in a specific order.

• Future methods have a limit of 50 per transaction, while Queueable Apex has a limit of 50 jobs in the queue per transaction.

• Future methods cannot be...read more

Future methods in Salesforce can accept primitive data types as parameters.

• Primitive data types like Integer, String, Boolean, etc. can be passed as parameters to Future methods.

• Non-primitive data types like custom objects or collections cannot be passed as parameters to Future methods.

• Example: @future public static void myFutureMethod(Integer param1, String param2) { }

To pass subjects to future methods, use the @future annotation in Apex.

• Use the @future annotation before the method declaration to indicate that the method will run asynchronously in the future.

• Pass the subject parameters to the @future method as arguments when calling the method.

• Ensure that the subject parameters are serializable to be passed to future methods.

Tools for deployment include Salesforce DX, Ant Migration Tool, Change Sets, and Metadata API.

• Salesforce DX is a command-line interface for development and deployment

• Ant Migration Tool is a Java/Ant-based tool for moving metadata between environments

• Change Sets allow for moving configuration changes between orgs

• Metadata API is a web service for managing metadata

Create a trigger on Contact to display the number of contacts on the related Account.

• Create an after insert, update, delete trigger on Contact object

• Query for the count of contacts related to the Account

• Update a custom field on the Account with the count of contacts

Create a trigger on Account to prevent deletion if associated with one or more contacts

• Create an after delete trigger on Account object

• Query for related contacts using SOQL

• If contacts are found, add an error message to prevent deletion

Display Accounts with related contacts in a list using LWC code

• Create a Lightning web component (LWC) to display the list

• Use Apex to query for Accounts and their related Contacts

• Iterate over the data to display Accounts and their related Contacts in the list

Create a trigger on Order Products to display the most sold product type on the account

• Create a trigger on Order Products object in Salesforce

• Use SOQL query to count the number of each product type sold

• Update the most_sold_product field on the Account object with the highest sold product type

Batch class syntax in Salesforce

• Batch class must implement Database.Batchable interface

• Define start, execute, and finish methods

• Use Database.executeBatch method to execute the batch class