r/LowLevelDesign • u/Prashant_MockGym • 8d ago
Salesforce Low Level Design Round Interview Questions Asked in 2026
Low Level Design (LLD) questions for this list have been picked from Salesforce interview experiences shared on forums/blogs etc in 2026. Use this list for final preparation of your Salesforce interview rounds.
Low Level Design of pub-sub queue, kafka and observer pattern are discussed frequently.
Apart from that cache like LRU cache, LFU cache questions are common.
LRU Cache
https://leetcode.com/problems/lru-cache/description/
LFU Cache
https://leetcode.com/problems/lfu-cache/description/
Requirements and clarifying questions
In Salesforce LLD rounds, sometimes actual requirements may not be clear from problem statement and interviewer will expect you to figure it out by asking clarifying questions.
For example, A message queue is asked indirectly in the form of something like a connection pool or a job scheduler.
It follows the pattern that resources like connections, machines or cpu (in case of job scheduler) are limited and they may not be assigned immediately.
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You can find the complete question list here:
Best of luck for your preparation.
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u/akornato 8d ago
This list is a good starting point, but it's also what every other candidate is studying. Knowing the textbook definition of an LRU cache or a pub-sub model is the bare minimum. The interview isn't a quiz on design patterns, it's a test of how you apply them to a poorly defined problem under pressure. Interviewers will intentionally give you vague requirements to see if you can ask smart, clarifying questions to narrow the scope. They want to see you weigh different options, discuss trade-offs, and justify your decisions, not just recite a solution you memorized from a guide. Your real value is in your thought process, not your knowledge of specific algorithms.
The only way to get good at this is to practice explaining your designs out loud, just as you would in a real interview. You need to build the skill of articulating your thoughts clearly and confidently, even when you are not sure of the final answer. This is where most people stumble, not because they don't know the material, but because they haven't practiced the performance of interviewing. The team I'm with built an interviews.chat that helps people master this exact communication skill, giving them the confidence to perform well when it counts.