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Salesforce Interview Question Bank

Salesforce's loop is bank-driven: a small set of coding prompts (LFU Cache, Flatten JSON, linked-list dedup, frontend curry + traffic light, OA HackerRank classics) and one signature system design (Coffee Ordering, with its SQL follow-ups) cover the bulk of recent rounds. Down-leveling at offer time is common — the HM screen and behavioural depth materially shape the final level, often more than coding correctness alone.

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Last updated 2026/7/28

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System Design·45 min

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Coffee Ordering System Design

Salesforce's signature backend SD prompt: design an online coffee ordering / management service end-to-end. Interviewers compress the design into 30 minutes and then drill on SQL queries and edge cases ("customers who never ordered", "top spender last month"), so a clean ER model and explicit notification flow are weighted more than novel architecture.

coffee-ordering

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OJ Problems

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Optimal Account Balancing Delete One Character Type to Minimize Unique-Character Segments Longest Increasing Subsequence Maximal Square Order a Nearly Sorted UDP Packet Stream Minimum Knight Moves on a Chessboard Maximal Rectangle Maximal Square Minimum Sum of Weekly Campaign Maxima Maximum Requests in a Time Window Maximum Number of Palindromic Strings After Cross-String Character Swaps Hands-on Coding Project: High-Concurrency Web Crawler to CSV Remove Invalid Parentheses (Extended: three bracket types)Flatten JSON using DFS Array In-place Operation String Anagram Windows Top K Points Sliding Window Character Count Binary String 01 to 10 swap Check Duplicates in Array Flatten Nested HashMap JSON Implement LFU Cache Min Elements to Remove to Make Almost Sorted Array String Compression Problem Longest Subsequence which is a Substring Spam Classification String Compression Split Array Largest Sum Find Words in String Not in Subsequence (MLE :)Find Longest Subsequence Common to X as Substring in Y (MLE :)

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