Bloomberg

The 40 Bloomberg interview problems asked most — recent (last six months) first, then all-time frequency — grouped by pattern.

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Arrays & Hashing

Two Pointers

Trapping Rain Water↻Hard
3Sum↻Medium
Container With Most Water↻Medium
Merge Sorted Array↻Easy
Remove Duplicates from Sorted Array↻Easy
Move Zeroes↻Easy

Sliding Window

Longest Substring Without Repeating Characters↻Medium
Best Time to Buy and Sell Stock↻Easy

Stack

Valid Parentheses↻Easy
Min Stack↻Medium

Binary Search

Median of Two Sorted Arrays↻Hard
Search In Rotated Sorted Array↻Medium

Linked List

Backtracking

Word Search↻Medium
Subsets↻Medium

Graphs

Number of Islands↻Medium

1-D DP

Longest Palindromic Substring↻Medium
Climbing Stairs↻Easy

Greedy

Maximum Subarray↻Medium

Intervals

Merge Intervals↻Medium
Meeting Rooms II↻Medium

Math & Geometry

Palindrome Number↻Easy

Strings

Longest Common Prefix↻Easy
Roman to Integer↻Easy

Bit Manipulation

Reverse Integer↻Medium