Coding interview questions

Bloomberg Coding Interview Questions (DSA)

The 50 DSA problems Bloomberg has asked most in the last six months, most-asked first. 50 of them have a full breakdown with diagrams and code. Tick them off as you go.

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50problems
50full breakdowns
40topics

By difficulty: Easy (18) · Medium (28) · Hard (4)

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Topics

1.Two Sum
Full breakdownArrayHash Table
Easy+10▶ Mock
2.Add Two Numbers
Full breakdownLinked ListMathRecursion
Medium+3▶ Mock
3.Longest Substring Without Repeating Characters
Full breakdownHash TableStringSliding Window
Medium+13▶ Mock
5.Longest Palindromic Substring
Full breakdownTwo PointersStringDynamic Programming
Medium+8▶ Mock
6.Zigzag Conversion
Full breakdownString
Medium▶ Mock
7.Reverse Integer
Full breakdownMath
Medium▶ Mock
8.String to Integer (atoi)
Full breakdownString
Medium▶ Mock
9.Palindrome Number
Full breakdownMath
11.Container With Most Water
Full breakdownArrayTwo PointersGreedy
Medium+6▶ Mock
4.Median of Two Sorted Arrays
Full breakdownArrayBinary SearchDivide and Conquer
Hard+5▶ Mock
13.Roman to Integer
Full breakdownHash TableMathString
Easy+1▶ Mock
14.Longest Common Prefix
Full breakdownArrayStringTrie
Easy+1▶ Mock
15.3Sum
Full breakdownArrayTwo PointersSorting
Medium+5▶ Mock
18.4Sum
Full breakdownArrayTwo PointersSorting
Medium▶ Mock
20.Valid Parentheses
Full breakdownStringStackBracket Sequences
Easy+3▶ Mock
21.Merge Two Sorted Lists
Full breakdownLinked ListRecursion
Easy+2▶ Mock
22.Generate Parentheses
Full breakdownStringDynamic ProgrammingBacktracking
Medium+1▶ Mock
23.Merge k Sorted Lists
Full breakdownLinked ListDivide and ConquerHeap (Priority Queue)
Hard+4▶ Mock
26.Remove Duplicates from Sorted Array
Full breakdownArrayTwo Pointers
Easy+1▶ Mock
27.Remove Element
Full breakdownArrayTwo Pointers
28.Find the Index of the First Occurrence in a String
Full breakdownTwo PointersStringString Matching
31.Next Permutation
Full breakdownArrayTwo Pointers
Medium▶ Mock
33.Search in Rotated Sorted Array
Full breakdownArrayBinary Search
Medium+5▶ Mock
35.Search Insert Position
Full breakdownArrayBinary Search
42.Trapping Rain Water
Full breakdownArrayTwo PointersDynamic Programming
Hard+6▶ Mock
49.Group Anagrams
Full breakdownArrayHash TableString
Medium+9▶ Mock
50.Pow(x, n)
Full breakdownMathRecursion
Medium▶ Mock
48.Rotate Image
Full breakdownArrayMathMatrix
Medium▶ Mock
53.Maximum Subarray
Full breakdownArrayDivide and ConquerDynamic Programming
Medium+7▶ Mock
54.Spiral Matrix
Full breakdownArrayMatrixSimulation
Medium+2▶ Mock
55.Jump Game
Full breakdownArrayDynamic ProgrammingGreedy
Medium▶ Mock
56.Merge Intervals
Full breakdownArraySortingQuicksort
Medium+14▶ Mock
67.Add Binary
Full breakdownMathStringBit Manipulation
69.Sqrt(x)
Full breakdownMathBinary SearchNewton's Method
70.Climbing Stairs
Full breakdownMathDynamic ProgrammingMemoization
Easy+4▶ Mock
1029.Two City Scheduling
Full breakdownArrayGreedySorting
Medium▶ Mock
78.Subsets
Full breakdownArrayBacktrackingBit Manipulation
Medium▶ Mock
79.Word Search
Full breakdownArrayStringBacktracking
Medium+1▶ Mock
84.Largest Rectangle in Histogram
Full breakdownArrayStackMonotonic Stack
88.Merge Sorted Array
Full breakdownArrayTwo PointersSorting
Easy+1▶ Mock
118.Pascal's Triangle
Full breakdownArrayDynamic Programming
121.Best Time to Buy and Sell Stock
Full breakdownArrayDynamic Programming
Easy+10▶ Mock
134.Gas Station
Full breakdownArrayGreedy
Medium+5▶ Mock
138.Copy List with Random Pointer
Full breakdownHash TableLinked List
Medium+1▶ Mock
146.LRU Cache
Full breakdownHash TableLinked ListDesign
Medium+9▶ Mock
1244.Design A Leaderboard
Full breakdownHash TableDesignSorting
Medium▶ Mock
162.Find Peak Element
Full breakdownArrayBinary Search
Medium▶ Mock
169.Majority Element
Full breakdownArrayHash TableDivide and Conquer
205.Isomorphic Strings
Full breakdownHash TableString

Frequently Asked Questions

What questions does Bloomberg ask in coding interviews?

Bloomberg coding interviews focus on Array, Backtracking, Binary Search, Bit Manipulation, and other data structure problems. We compiled 50 questions from real Bloomberg interviews. The most common topics are Array, Backtracking, Binary Search, Bit Manipulation, Boyer–Moore Majority Vote Algorithm. Filter by topic to see what comes up most often.

How many Bloomberg coding interview questions are there?

InterviewSkool has 50 Bloomberg coding interview questions: 18 Easy, 28 Medium, and 4 Hard. Most Bloomberg interviews focus on Medium-difficulty problems, so prioritize those in your prep.

How should I prepare for Bloomberg coding interviews?

Start with Medium difficulty problems. Group by topic (Array, Tree, DP) to build pattern recognition. Aim to solve 30 to 40 problems before your interview. Then practice under pressure with a mock interview.

Are Bloomberg coding interview questions free?

Yes. All 50 Bloomberg coding interview questions are free to browse with no sign-up required. You can filter by difficulty and topic tags. Start a mock interview with a free credit to practice under real pressure.

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