IBM Salesforce Developer interview questions shared by candidates with 4.8+ years of experience across the technical and PDM rounds (updated Oct 2026). Questions are grouped by topic so you can revise performance optimisation, security, flows and integration one area at a time.
What's Covered
Topics covered in these interviews.
01Performance & Optimization9
02Security & Flows15
03Integration & Project13
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.
Performance & Optimization
1A record was updated in the backend but does not show in the UI. What is your approach?
2An LWC component is lagging and loads slowly. What is your approach to optimising it?
3A major trigger keeps exceeding the SOQL query limit. What optimization strategies do you use to identify causes and fix it?
4How do you check whether a user has visited the current tab in LWC?
5How do you do an HTTP callout in LWC without Apex?
6Write the pagination LWC code.
7An LWC needs to display around 50k records but does not function properly. How do you optimise it?
8How does debouncing reduce round trips to the server?
9A custom object has grown from small to millions of records and query performance is suffering. How do you optimise it?
Security & Flows
10How do you run a code block in another user's context?
11A Case is pending for X days. How do you communicate to other users by email?
12How does Salesforce manage FLS and record-based security?
13What is the advantage of trigger handlers over a helper class?
14What is the difference between a Profile and a Permission Set, and between OWD and a Profile?
15Can we call a future method in Batch Apex? Can we call a batch within a batch? Can we call an Apex method in a flow?
16What is LDS and how do you create a form with a Save button? What are the common errors while saving the form?
17How do you hide an app from 10 users but not from the other 90?
18What is the difference between synchronous and asynchronous Apex?
19How do you give User A access to User B's records?
20A standard button in LWC must invoke a screen flow where the user enters first and last name and updates the Account. What is your approach?
21What are Mixed DML operations in a flow, how do you handle them, and how do you run flows asynchronously or divide the transaction?
22What are Service Cloud case entitlements?
23How do you change the frequency of a batch job, such as quarterly emails that later become monthly and then weekly?
24Three unrelated components are on a record page. When I update one, the other two must refresh. How?
Integration & Project
25Complete the integration setup for an outbound call.
26How would you design this integration architecture in Salesforce, including the cross questions?
27Does Salesforce Connect allow third-party API integration, and how does it differ from Lightning Connect?
28What are the latest Winter '26 release features?
29How will Salesforce know about a change in a Campaign in a Java backend system, and how do you sync and update them?
30After a sandbox refresh some existing functionality broke. How do you fix it?
31What is the most complex scenario you faced and how did you resolve it?
32Explain your roles and responsibilities, your deployment setup, and whether you are an individual contributor or part of a team.
33Some records fail during integration but you want to process the rest. How do you handle failed records and commit the successful ones?
34The third-party system sends duplicate records during integration. How do you catch and handle them?
35What is the callout retry mechanism logic?
36What could cause an "uncommitted changes" error in an API call?
37Write a trigger: when an Account status is updated to In Progress, update related Contacts to In Progress and count them.
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