Persistent Systems Salesforce Developer interview questions shared by candidates with 3+ years of experience across the L1 and L2 rounds (updated Oct 2026). Questions are grouped by topic so you can revise triggers, SOQL, LWC, flows, security and integration one area at a time. Also read our earlier Persistent Salesforce developer interview questions.
What's Covered
Topics covered in these interviews.
01Apex Triggers & Coding17
02Lightning Web Components & Flows19
03Security, Sharing & Admin12
04Service Cloud, Integration & Project7
All Interview Questions
Every question listed one by one, in a fresh order. Answers are not included, so practise explaining each one in your own words.
Apex Triggers & Coding
1Write a trigger that throws an error when a duplicate Contact is entered with the same last name and email.
2What is the use of Custom Metadata methods, and can we fetch custom metadata via SOQL?
3Write code to fetch an Account record from an external system using Batch Apex and update the Type field to 'Industry'.
4Write a SOQL query to fetch the second largest Opportunity amount, and one for the nth highest.
5What is Liskov's substitution principle, and have you used any design pattern in your project?
6Write a trigger that throws an error when inserting more than two Contacts related to an Account.
7What is the difference between custom setting and custom metadata?
8How do you solve a Mixed DML error, and have you faced a field integrity exception?
9Write a SOQL query to show the sum of all associated Opportunities within an Account.
10Write a roll-up summary trigger on Account for the sum of Contact amounts, covering insert, update and delete.
11Explain asynchronous operations and how to chain Apex methods.
12Write the logic to create an Account, then a Contact associated with it, and then a community user associated with the Contact.
13Are you aware of dynamic SOQL? Write an example.
14Write a SOQL query to fetch all Contacts not associated with an Account.
15What is External Id?
16Write a SOQL query to fetch the sum of the amounts of Opportunities.
17Given a Map<Id, Map<Id, List<Id>>>, fetch the list of Ids without using map.get(key) or iterating the map.
Lightning Web Components & Flows
18What are the types of decorators? Show wire with an example, and when does wire get called?
19Write the pagination algorithm.
20How can we capture multiple user inputs from an event in LWC using a dynamic object?
21How do you restrict access to some LWC components for particular users, and show a component to community users?
22Can we perform DML statements in JavaScript?
23How do you do child-to-parent communication, and how do you call one method after another?
24Why do we use a Scheduled Path in a flow with a 3-day offset?
25A, B, C, D and E are nested components. How do you communicate from E to A?
26On click of an Account button, show the Account with associated Contacts and then the associated community user.
27Write an LWC that creates a Case on a quick action click and shows a toast notification.
28How do you optimise an LWC that shows 10,000 records?
29Can we use two-way binding in LWC? Write code to show picklist field values. What is the difference between LWC and Aura?
30Write an LWC to fetch a record in JS, perform a DML operation and show it in the UI.
31How can we get the record of the page in an LWC?
32What are the advantages and limitations of LDS, and what is LMS?
33How do you show an error message in the UI through a flow?
34What is a promise?
35Write a lightning datatable to show Accounts with related record counts.
36How can you call an LWC inside a Visualforce page, and inside a flow?
Security, Sharing & Admin
37OWD is Private and the profile has only Read. How can the user see and edit all records?
38What is a sharing rule, and what are the scenario questions on security?
39If records are shared through sharing settings but profile access is not given, can the manager still see the reportees' records?
40A user has Read on the profile and Public Read/Write on OWD. What access does the user have?
41Explain the sales process. Is the Contact optional during lead conversion? Give an example of a standard junction object.
42What is Apex sharing and with sharing?
43How can we sync a calendar with Outlook using Einstein Activity Capture?
44The user, immediate manager and senior manager: a record created by the user should not be visible to the immediate manager but should be visible to the senior manager. How?
45How do you share records among a public group that has a hierarchy?
46What are restriction rules in Salesforce?
47How do you create community users? Explain from your project.
48A user has CRED on the profile and Private OWD. What access does the user have?
Service Cloud, Integration & Project
49Do you have experience in Health Cloud or Service Cloud? Which Service Cloud features did you implement?
50In Omni-Channel, if the user owning a Case leaves the company, what should you do? What is the better solution with Case escalation rules?
51Why do we use the Composite API?
52What are the integration patterns in Salesforce?
53Explain your project and two scenarios you found difficult to resolve.
54How do you handle a connected app and named credentials?
55What are outbound messages and when do we use them?
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