Interview prep · 7 parts

Salesforce Interview Questions

Admin, Apex, triggers, SOQL, Lightning Web Components and integration. Each question has an answer you can say out loud, the reasoning, and the follow-ups to expect.

Also coversSFDCApexSalesforce developerSalesforce adminLightningLWCSOQL

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In this series
7
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51
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18 Beginner23 Intermediate10 Advanced
About this series

What Salesforce interviews test

Salesforce developer interviews test two things: whether you understand how the platform limits what code may do, and whether you can write Apex that stays inside those limits with real data volumes. Expect questions on governor limits, trigger design, sharing and security, asynchronous Apex and testing.

Seven parts cover it end to end - Apex, admin, trigger scenarios, SOQL and SOSL, Lightning Web Components, integration, and a cheat sheet for the night before. Every answer goes the same way: what it is, why it matters, an example with code or a diagram, and the short version to say out loud.

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The 7 parts

PART 018 questionsApex Interview Questions and AnswersThe Apex questions interviewers actually ask - governor limits, triggers, sharing, async Apex and testing - with short answers, code and follow-ups.4 Beginner3 Intermediate1 Advanced18 minPART 028 questionsSalesforce Admin Interview Questions and AnswersProfiles and permission sets, the sharing model, relationships, roll-ups, validation rules, Flow and data loading - the admin questions asked most.6 Beginner2 Intermediate16 minPART 037 questionsApex Trigger Scenario Interview QuestionsOrder of execution, context variables, the handler pattern, recursion, and the trigger scenarios interviewers ask you to write - with bulkified code.5 Intermediate2 Advanced17 minPART 047 questionsSOQL and SOSL Interview Questions and AnswersSOQL vs SOSL, relationship and aggregate queries, dynamic SOQL and injection, user-mode security and selective queries - with examples.1 Beginner3 Intermediate3 Advanced15 minPART 057 questionsLightning Web Components (LWC) Interview QuestionsLWC vs Aura, decorators, component communication, calling Apex with @wire or imperatively, lifecycle hooks and Lightning Data Service - with code.3 Beginner4 Intermediate16 minPART 067 questionsSalesforce Integration Interview QuestionsREST, SOAP and Bulk APIs, callouts with Named Credentials, Apex REST services, Platform Events vs Change Data Capture and OAuth - explained with code.3 Intermediate4 Advanced17 minPART 077 questionsSalesforce Cheat Sheet: Limits and Key FactsThe numbers and facts to revise the night before a Salesforce interview: governor limits, async Apex, trigger context, security, testing and sandboxes.4 Beginner3 Intermediate10 min
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51 Salesforce questions in this series

Apex Interview Questions and Answers

  1. What are governor limits, and why does Salesforce have them?Beginner
  2. What is bulkification, and why does it matter?Beginner
  3. What is the difference between a before trigger and an after trigger?Beginner
  4. Write a trigger that stops duplicate Contacts with the same email.Intermediate
  5. List, Set and Map in Apex - when do you use each?Beginner
  6. What do with sharing, without sharing and inherited sharing mean?Intermediate
  7. Future vs Queueable vs Batch Apex - when do you use each?Advanced
  8. What code coverage does Salesforce require, and what do Test.startTest and Test.stopTest do?Intermediate

Salesforce Admin Interview Questions and Answers

  1. What is the difference between a profile and a permission set?Beginner
  2. How does record-level security work - org-wide defaults, role hierarchy, sharing rules?Intermediate
  3. What is the difference between a lookup and a master-detail relationship?Beginner
  4. What is a roll-up summary field?Beginner
  5. What is a validation rule? Give an example.Beginner
  6. What kinds of Flow are there, and when do you choose Flow over Apex?Intermediate
  7. What is the difference between record types and page layouts?Beginner
  8. Data Import Wizard or Data Loader - which do you use?Beginner

Apex Trigger Scenario Interview Questions

  1. What is the order of execution when a record is saved?Advanced
  2. What are trigger context variables, and when is each one available?Intermediate
  3. Why one trigger per object, and what is a trigger handler?Intermediate
  4. How do you stop a trigger from running recursively?Intermediate
  5. Scenario: when an Account's phone changes, update the phone on all its Contacts.Intermediate
  6. Scenario: keep a count of Contacts on each Account (a roll-up over a lookup).Advanced
  7. Scenario: prevent deleting an Account that has open Opportunities.Intermediate

SOQL and SOSL Interview Questions and Answers

  1. What is the difference between SOQL and SOSL?Beginner
  2. How do you query related records in SOQL?Intermediate
  3. How do aggregate queries work in SOQL?Intermediate
  4. What is SOQL injection, and how do you prevent it?Advanced
  5. How do you enforce object and field permissions in SOQL and DML?Advanced
  6. What is a selective query, and why does it matter on large objects?Advanced
  7. What is a SOQL for loop, and when do you use FOR UPDATE?Intermediate

Lightning Web Components (LWC) Interview Questions

  1. What is LWC, and how is it different from Aura?Beginner
  2. What do @api, @track and @wire do?Beginner
  3. How do Lightning Web Components communicate with each other?Intermediate
  4. @wire or imperative Apex - which do you use?Intermediate
  5. What are the LWC lifecycle hooks?Intermediate
  6. What is Lightning Data Service, and when do you use it instead of Apex?Intermediate
  7. How do you render conditionally and loop over a list in an LWC template?Beginner

Salesforce Integration Interview Questions

  1. What integration options does Salesforce offer, and how do you choose?Intermediate
  2. What are Named Credentials, and why use them?Intermediate
  3. How do you test Apex that makes a callout?Intermediate
  4. How do you expose a custom REST API from Salesforce?Advanced
  5. Platform Events vs Change Data Capture - what is the difference?Advanced
  6. Scenario: you get "You have uncommitted work pending" - why, and how do you fix it?Advanced
  7. Which OAuth flow do you use to connect an external system to Salesforce?Advanced

Salesforce Cheat Sheet: Limits and Key Facts

  1. Which per-transaction limits should you know by heart?Beginner
  2. Async Apex at a glance - what are the key numbers?Intermediate
  3. Trigger facts to rememberIntermediate
  4. Security in one view: who can do what, and see which records?Intermediate
  5. Testing and deployment facts to knowBeginner
  6. What sandbox types are there?Beginner
  7. Other numbers that come upBeginner
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How to use this series
  1. Turn on Practice mode and answer each question out loud.
  2. Reveal the answer and compare it with the short version.
  3. Learn the follow-ups - that is where interviews are decided.
  4. Come back the night before and skim the short answers.