Intuit Coding Interview Questions
25 Intuit coding interview problems with full optimal solutions — 15 easy, 7 medium, 3 hard. Every problem ships with multiple approaches (brute-force first, then the optimal), complexity tables for each, company-specific tips on what an Intuit interviewer values, and a FAQ section.
Showing 11 problems of 25
- #1easyfrequently asked
1. Two Sum
Given an array of integers and a target, return indices of two numbers that add up to the target. Intuit asks this as a screen to test whether you spot the hash-map optimization and whether you handle financial-precision concerns when the values represent cents.
- #2easyfrequently asked
2. Valid Parentheses
Given a string containing brackets, determine if every opener has a matching closer in correct order. Intuit asks this to test stack basics — relevant because TurboTax and QuickBooks parse nested form-rule expressions and reconciliation grouping all day.
- #3easyfrequently asked
3. Merge Two Sorted Lists
Merge two sorted singly-linked lists into one sorted list. Intuit asks this as a linked-list warm-up — useful conceptually for reconciliation merge passes between two sorted ledger streams.
- #4easyfrequently asked
4. Remove Duplicates from Sorted Array
Given a sorted array, remove duplicates in-place and return the new length. Intuit asks this in dedup contexts — TurboTax cleans duplicated 1099 rows, QuickBooks dedupes bank-feed transactions before reconciliation.
- #6easyfrequently asked
6. Search Insert Position
Find the index where a target should be inserted into a sorted array to keep it sorted. Intuit asks this as a binary-search warm-up — useful for tax-bracket lookup: 'which bracket does this income fall into?'
- #8easyfrequently asked
8. Merge Sorted Array
Merge two sorted arrays in-place. Intuit asks this because it mirrors reconciliation: merge two sorted transaction streams (bank + book) without allocating a third buffer.
- #11easyfrequently asked
11. Best Time to Buy and Sell Stock
Given an array of stock prices by day, find the maximum profit from a single buy/sell transaction. Intuit asks this to test single-pass min/max tracking and to probe whether you handle financial values as integer cents instead of floats.
- #16mediumfrequently asked
16. Number of Islands
Count the number of connected '1' regions in a 2D grid of '1' (land) and '0' (water). Intuit asks this as the canonical DFS/BFS-on-grid problem and reframes it as 'count distinct expense clusters' for financial-graph candidates.
- #17mediumfrequently asked
17. LRU Cache
Design an LRU (least-recently-used) cache with O(1) get and put. Intuit asks this to test data-structure composition (hash + doubly-linked list) and reframes it as 'cache the last N tax-form lookups' for TurboTax candidates.
- #18mediumfrequently asked
18. Course Schedule
Given a list of courses with prerequisites, determine whether you can complete all courses (i.e., the dependency graph has no cycle). Intuit asks this to test cycle detection and reframes it as 'detect circular dependencies in a tax-form rule tree.'
- #22mediumfrequently asked
22. Coin Change
Given coin denominations and a target amount, find the fewest coins needed to make the amount. Intuit asks this constantly — it maps directly to giving change in QuickBooks POS and to optimal-payment-plan calculations in TurboTax.
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