Salesforce Coding & Algorithms Interview Questions
Salesforce Coding & Algorithms interview questions focus on clear, scalable problem solving: you’ll be evaluated on data structures, algorithmic patterns, complexity analysis, edge-case handling, and readable, testable code. What’s distinctive is the mix of classic algorithmic puzzles and product-context problems that reward practical tradeoffs — handling large inputs, writing robust code under time pressure, and explaining correctness and performance. Expect language flexibility (Java, Python, C++, etc.) and occasional platform-specific considerations for roles touching the Salesforce stack. The typical flow often starts with an online coding assessment (2–3 timed problems), progresses to one or more technical screens with live coding and follow-up questions, and for senior roles adds system-design or architecture conversations. For interview preparation, prioritize timed practice on medium-to-hard problems (arrays, strings, trees, graphs, dynamic programming), rehearse complexity explanations, run examples and edge cases aloud, and do mock interviews to sharpen communication. Emphasize clean API-like function interfaces, defensive checks, and tradeoffs — those practices separate correct solutions from interview-ready ones.
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Maximize events attended given date ranges
You are given n events, where each event i can be attended on any single day within an inclusive range \([start_i, end_i]\). You can attend at most on...
Remove duplicates and find constrained longest subsequence
You are given two independent coding tasks. Task 1: Remove duplicates from a linked list Given the head of a singly linked list (not necessarily sorte...
Flatten a nested JSON object
Problem You are given a JSON-like value representing an object that may contain: - Objects / dictionaries (string keys) - Arrays / lists - Primitive v...
Solve sliding window, heap, DP, in-place tasks
You are given several LeetCode-style coding tasks. Implement each with the stated time/space goals and handle edge cases. 1) Sliding Window: longest s...
Implement common data-structure and JS tasks
You are given several independent coding tasks that appeared across an OA and frontend-focused interviews. Implement each as specified. 1) Time-based ...
Minimize operations to reduce integer to zero
You are given a non-negative integer n. In one operation: - If n is even, you may replace n with n / 2. - If n is odd, you may replace n with either n...
Implement a traffic-light UI with JS
Frontend Coding: Traffic Light Build a simple traffic light component using HTML + CSS + JavaScript. Requirements - Render a vertical traffic light wi...
Find longest subsequence of x that is a substring of y
Given two strings x and y, compute the maximum length of a string s such that: - s is a subsequence of x (can delete zero or more characters from x wi...
Implement an LFU cache
Problem: LFU Cache Design and implement a Least Frequently Used (LFU) cache with a fixed capacity. The cache supports the following operations: - get(...
Solve array duplicate flags and binary swaps
Problem 1: Flag duplicates on the left and right You are given an integer array nums of length n. For each index i, determine: 1. Left-duplicate: whet...
Implement an LFU cache with O(1) operations
Design and implement an LFU (Least Frequently Used) cache. The cache supports: - get(key): return the value for key if present, else return -1. - put(...
Flatten nested JSON into a string map
Problem You are given an input JSON object that may contain nested objects and arrays. Your task is to flatten it into a single-level key/value mappin...
Remove duplicates from a singly linked list
You are given the head of a singly linked list of integers. Modify the list in place so that it contains only the first occurrence of each value (i.e....
Implement 64-bit modular exponentiation safely
Implement a function to compute (a^b) mod m where 0 ≤ a,b < 2^61−1 and 1 ≤ m < 2^61−1 using only 64-bit operations without overflow. Provide implement...
Minimize steps to reduce integer
Given a positive integer n (1 <= n <= 2^61 - 1), in one step you may replace n with n/2 if n is even, or with n+1 or n-1 if n is odd. Return the minim...
Convert Integer to Non-Adjacent Form
Implement toNAF(n) that converts an integer n (allow negative n) to its Non-Adjacent Form using digits from {-1, 0, 1} with no two adjacent nonzero di...
Deduplicate a Linked List
Given a singly linked list, remove duplicate values in-place. Variant A (sorted list): delete repeated nodes so each value appears once using O( 1) ex...
Determine minimal substitutions and removals
Question Given a list of words, determine the minimum number of character substitutions required so that, in every word, no two adjacent characters ar...
Convert integer to NAF form
Question Convert a given integer into its Non-Adjacent Form (NAF) representation such that no two non-zero digits are adjacent, and prove that the res...
Design O(nm) grouping of rearranged strings
Given an array of strings, group together words that are permutations of the same characters. Provide a baseline solution that sorts each word (O(n · ...