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Deloitte interview questions

The most frequent LeetCode problems tagged to Deloitte. This is a data-only page. For process and behavioral prep, use the coding guide and behavioral guide.

Based on 9 distinct problems tagged to Deloitte in the last 6 months (1 in the last 30 days, 5 in the last 3 months, 38 all-time) across two open datasets of LeetCode company tags. Tags are user-reported, so treat frequency as a signal, not a promise.

Difficulty mix (last 6 months): Easy 56%, Medium 33%, Hard 11%

Most tagged topics (share of problems): String 67%, Hash Table 44%, Array 22%, Sorting 22%, Math 22%, Linked List 11%, Divide and Conquer 11%, Heap (Priority Queue) 11%, Merge Sort 11%, Tournament Sort 11%

Watch out: Deloitte has thin LeetCode data. Weight the reported questions and the format notes above more than this list.

Most frequent problems

Ranked by frequency, weighted toward the last 30 days. Classics like Two Sum sit near the top of almost every company's list because users tag them everywhere. Solve those fast. The signature list below is more specific to this company.

# Problem Difficulty Last seen Topics
1 Merge k Sorted Lists Hard 30 days Linked List, Divide and Conquer, Heap (Priority Queue), Merge Sort
2 Longest Substring Without Repeating Characters Medium 3 months Hash Table, String, Sliding Window
3 Group Anagrams Medium 3 months Array, Hash Table, String, Sorting
4 Climbing Stairs Easy 3 months Math, Dynamic Programming, Memoization
5 Valid Palindrome Easy 3 months Two Pointers, String
6 Two Sum Easy 6 months Array, Hash Table
7 Add Binary Easy 6 months Math, String, Bit Manipulation, Simulation
8 Valid Anagram Easy 6 months Hash Table, String, Sorting
9 Remove K Digits Medium 6 months String, Stack, Greedy, Monotonic Stack

Sources

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