SOQL Optimization

In plain words: Governor Limits are Salesforce's traffic rules for multi-tenant architecture. Because many companies share the same underlying cloud infrastructure, Salesforce enforces strict transaction caps (like memory, queries, and CPU time) so one piece of inefficient code cannot slow down or crash the shared platform. Salesforce executes Apex code in a multi-tenant cloud environment. To guarantee high performance, platform stability, and fair resource sharing, the runtime engine enforces strict per-transaction limits known as Governor Limits . When code exceeds these boundaries, Salesforce throws a fatal runtime LimitException that immediately halts execution. Writing resilient Apex requires a clear understanding of these boundaries and defensive design patterns.

Salesforce interviews today test more than syntax. Hiring managers want to know that you can protect data, design for scale, and explain why you made each choice. This post covers the questions that come up most often, in two parts: the security model, which every admin and developer must know, and the core developer topics, like governor limits, SOQL, and deployments. In plain words: Salesforce security has two halves. Object-level security (Profiles and Permission Sets) decides whether a user can see or edit a whole type of data, like "Accounts." Record-level security (OWD, Role Hierarchy, and Sharing Rules) decides which specific records, like "Acme Corp" vs. "Stark Industries," that user can see. On the developer side, interviewers look for code that is bulkified, stays inside governor limits, respects security, and is deployed through a proper pipeline.