DXC Technology Salesforce Developer Interview Questions and Answers

It was easy and basic

Coding questions are bit complicated

Q1. Salesforce platform questions
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Q2. Basic hr questions and project based question
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Basic Apex coding questions

Q1. Technical Scenerio in LWC
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Q2. Basic sceneries in Apex sharing
Ans. 
Apex sharing allows developers to control access to records based on criteria.
• Apex sharing rules can be used to extend sharing access beyond the organization-wide defaults.

• Apex managed sharing allows developers to programmatically share records with specific users or groups.

• Sharing reasons can be used to define the reason for sharing a record in Apex.

• Apex sharing can be enforced using the 'with sharing' keyword in Apex
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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. Lookup and masterdetail
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Q2. Owd and profile level permission
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Q3. Write a trigger
Ans. 
A trigger is a piece of code that is executed before or after a record is inserted, updated, or deleted in Salesforce.
• Triggers are written in Apex and are used to perform custom actions on records.

• Triggers can be executed before or after a record is inserted, updated, or deleted.

• Triggers can be used to enforce validation rules, update related records, or perform other custom logic.
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Q4. LWC lifecycle hooks
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Q5. LWC decorators and uses
Ans. 
LWC decorators are used to add metadata to class fields or methods. '@api' is used to expose a public property or method.
• LWC decorators are used to enhance the functionality of Lightning web components.

• '@api' decorator is used to expose a public property or method that can be accessed by parent components.

• Other decorators like '@track', '@wire', '@api get', '@api set' are also commonly used in LWC development.
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Q1. Resume shortlist
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Q1. Decorators in lwc
Ans. 
Decorators in LWC are a way to enhance the functionality of a component by adding metadata and modifying behavior.
• Decorators are used to modify the behavior of properties, methods, and getters/setters in LWC.

• They are defined using the @ symbol followed by the decorator name.

• Some commonly used decorators in LWC are @api, @track, @wire, and @track.

• The @api decorator allows a property to be accessed by parent components.

• T...read more
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Q2. User need to choose the profile before login to salesforce
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Q3. How manual sharing works and how to see manually shared rercords
Ans. 
Manual sharing allows users to manually grant access to records. To see manually shared records, use the 'Sharing' button on the record detail page.
• Manual sharing is a feature in Salesforce that allows users to manually grant access to records.

• It is useful when users need to share specific records with other users or groups.

• To manually share a record, users can click on the 'Sharing' button on the record detail page.

• Fr...read more
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Q4. Write trigger on opportunity to sum of total opps and populate on account sumofopps field
Ans. 
Write a trigger on Opportunity to calculate the sum of total opportunities and populate it on the Account's 'SumOfOpps' field.
• Create a trigger on the Opportunity object

• Use an aggregate query to calculate the sum of the 'Amount' field on all related Opportunities

• Update the 'SumOfOpps' field on the related Account with the calculated sum
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Q1. Write trigger , there are 3 objects, a is parent, b child, c is grand child, when grand child updated update grand child desc on a object desc
Ans. 
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
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Q1. Apex trigger security model etc
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Q1. Managerial round
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Q1. Salary negotiation
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20 mins for 30 ques were there.