Coding interview questions

Oracle Medium Coding Interview Questions (DSA)

The 37 medium DSA problems Oracle has asked most in the last six months, most-asked first. Switch tabs to see the rest of the 50. Tick them off as you go.

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37medium problems
37full breakdowns
50Oracle problems in all

By difficulty: All (50) · Easy (8) · Medium (37) · Hard (5)

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Topics

18.4Sum
Full breakdownArrayTwo PointersSorting
Medium▶ Mock
33.Search in Rotated Sorted Array
Full breakdownArrayBinary Search
Medium+5▶ Mock
721.Accounts Merge
Full breakdownArrayHash TableString
Medium▶ Mock
200.Number of Islands
Full breakdownArrayDepth-First SearchBreadth-First Search
Medium+7▶ Mock
981.Time Based Key-Value Store
Full breakdownHash TableStringBinary Search
Medium+1▶ Mock
49.Group Anagrams
Full breakdownArrayHash TableString
Medium+9▶ 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
11.Container With Most Water
Full breakdownArrayTwo PointersGreedy
Medium+6▶ Mock
17.Letter Combinations of a Phone Number
Full breakdownHash TableStringBacktracking
Medium+1▶ Mock
15.3Sum
Full breakdownArrayTwo PointersSorting
Medium+5▶ Mock
22.Generate Parentheses
Full breakdownStringDynamic ProgrammingBacktracking
Medium+1▶ Mock
34.Find First and Last Position of Element in Sorted Array
Full breakdownArrayBinary Search
Medium+1▶ Mock
45.Jump Game II
Full breakdownArrayDynamic ProgrammingGreedy
Medium▶ Mock
46.Permutations
Full breakdownArrayBacktracking
Medium▶ 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+8▶ 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
57.Insert Interval
Full breakdownArray
Medium▶ Mock
73.Set Matrix Zeroes
Full breakdownArrayHash TableMatrix
Medium▶ Mock
75.Sort Colors
Full breakdownArrayTwo PointersSorting
Medium▶ Mock
79.Word Search
Full breakdownArrayStringBacktracking
Medium+1▶ Mock
74.Search a 2D Matrix
Full breakdownArrayBinary SearchMatrix
Medium▶ Mock
93.Restore IP Addresses
Full breakdownStringBacktracking
Medium▶ Mock
98.Validate Binary Search Tree
Full breakdownTreeDepth-First SearchBinary Search Tree
Medium+4▶ Mock
103.Binary Tree Zigzag Level Order Traversal
Full breakdownTreeBreadth-First SearchBinary Tree
Medium▶ Mock
Populating Next Right Pointers in Each Node
Full breakdownLinked ListTreeDepth-First Search
Medium+2▶ Mock
128.Longest Consecutive Sequence
Full breakdownArrayHash TableUnion-Find
Medium+3▶ Mock
134.Gas Station
Full breakdownArrayGreedy
Medium+6▶ Mock
138.Copy List with Random Pointer
Full breakdownHash TableLinked List
Medium+1▶ Mock
146.LRU Cache
Full breakdownHash TableLinked ListDesign
Medium+10▶ Mock
155.Min Stack
Full breakdownStackDesign
Medium▶ Mock

Frequently Asked Questions

What medium Oracle coding questions are most common?

InterviewSkool has 37 medium Oracle coding questions. Focus on the top 10 to 15 most common problems for the best ROI.

How many medium questions does Oracle have?

Oracle has 37 medium coding questions out of 50 total. Most interviews focus on Medium problems, so this is the most important difficulty to prepare for.

Are these Oracle medium questions free?

Yes. All 37 medium Oracle coding questions are free to browse. No sign-up required. Filter by topic and click any problem to open it on LeetCode.

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