EPAM Systems Salesforce Administrator Interview Questions and Answers

1) Trigger to update custom field totalamount__c on account object when opportunity record is updated or inserted . account.totalamount_c is sum of amount value of related opportunity .

2) write apex code to remove duplicate string from array of string .

Based on your work done in the past

Q1. Basic details and salary composition
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Q2. Bonus and variable amount details
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Q1. Technical questions will be based on the role you apply
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Q1. It was a managerial round and it was about previous work experience
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Q1. Can we call future method from batch class
Ans. 
Yes, future methods can be called from a batch class in Salesforce.
• Future methods can be called from batch classes to perform asynchronous processing.

• This can be useful for offloading long-running tasks to future methods to avoid hitting governor limits.

• Example: Calling a future method from a batch class to update records in Salesforce asynchronously.
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Q2. What's the use of @track decorator. Is it mandatory to explicitly use it? If yes, for which use case?
Ans. 
The @track decorator in Salesforce is used to track changes to a property in a Lightning web component.
• Used to make a property reactive and trigger re-renders when its value changes

• Not mandatory but recommended for properties that need to be reactive

• Use @track when you want changes to a property to be reflected in the UI
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Q3. When does APEX CPU Limit Exceeded error happens. What's the best practice to avoid getting this error?
Ans. 
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
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Q4. When does Mixed DML Exception occurs?
Ans. 
Mixed DML Exception occurs when DML operations are performed on setup and non-setup objects in a single transaction.
• Occurs when DML operations are performed on both setup and non-setup objects in a single transaction

• Setup objects include User, Profile, PermissionSet, etc.

• Non-setup objects include custom objects, standard objects like Account, Contact, etc.
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Q5. Debug the following code: var a=10; function abc() { console.log(a); var a=2; } abc();
Ans. 
The code will output 'undefined' because variable 'a' is hoisted within the function.
• Variable 'a' is hoisted to the top of the function scope, so when 'console.log(a)' is called, 'a' is undefined.

• To fix this, move the declaration of 'var a=2;' above the 'console.log(a);' statement.
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Q6. Write a SOQL query to fetch the values of description field from the Account. Why does "the description field cannot be filtered in the query call"?
Ans. 
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
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Q1. Types of Sharing Rules
Ans. 
Sharing rules control access to records that are owned by other users or in public groups.
• Criteria-based sharing rules

• Owner-based sharing rules

• Manual sharing

• Apex managed sharing
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Q2. Trigger Scenario-based Questions
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Q3. Types of LWC Decorators
Ans. 
LWC Decorators are used to enhance the functionality of Lightning Web Components.
• Wire Decorator - used to get data from Apex controllers

• Track Decorator - used to track changes in a property

• Api Decorator - used to expose a property or method to other components

• AuraEnabled Decorator - used to call an Apex method from a Lightning component

• LightningMessageService Decorator - used to subscribe to and publish events
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Q1. Salesforce basics
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Q2. Automation xpaths, short codes in java, SQL
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Q1. Questions on xpaths parent child following
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Q1. What is data loader how we can use deleteall and delete difference between lwc and aura
Ans. 
Data Loader is a tool provided by Salesforce for importing, exporting, and deleting data in Salesforce.
• Data Loader is used for bulk importing, exporting, and deleting data in Salesforce

• DeleteAll operation in Data Loader deletes all records in a specified object

• Delete operation in Data Loader deletes specific records based on a query

• Difference between LWC and Aura: LWC is a new programming model for building Lightning c...read more
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Q1. Why do you want to join DXC Are you comfortable to work at night shift
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