PRACTICE

Two Pointers Interview Questions

39 Two Pointers problems asked across FAANG and top tech companies. Approach hints, optimal solutions, and related problems.

Ready to try these in a real interview?

I'm Alex. I'll interview you on 2 problems like these at your level, ask follow-ups, and give you a scored report.

Start mock with Alex
🔒

to save your progress.

Companies

Topics

Two Pointers 39
Two PointersClear all
15.3Sum
ArrayTwo PointersSorting
Medium+5▶ Mock
11.Container With Most Water
ArrayTwo PointersGreedy
Medium+6▶ Mock
42.Trapping Rain Water
ArrayTwo PointersStack
Hard+6▶ Mock
283.Move Zeroes
ArrayTwo Pointers
Easy▶ Mock
567.Permutation in String
Hash TableTwo PointersString
Medium▶ Mock
75.Sort Colors
ArrayTwo PointersSorting
Medium▶ Mock
26.Remove Duplicates from Sorted Array
ArrayTwo Pointers
Easy+1▶ Mock
189.Rotate Array
ArrayMathTwo Pointers
Medium+1▶ Mock
88.Merge Sorted Array
ArrayTwo PointersSorting
Easy+1▶ Mock
167.Two Sum II - Input Array Is Sorted
ArrayTwo PointersBinary Search
Medium▶ Mock
125.Valid Palindrome
Two PointersString
Easy▶ Mock
977.Squares of a Sorted Array
ArrayTwo PointersSorting
Easy▶ Mock
31.Next Permutation
ArrayTwo Pointers
Medium▶ Mock
2503.Maximum Number of Points from Grid Queries
ArrayTwo PointersBreadth-First Search
Hard▶ Mock
16.3Sum Closest
ArrayTwo PointersSorting
Medium▶ Mock
18.4Sum
ArrayTwo PointersSorting
Medium▶ Mock
870.Advantage Shuffle
ArrayTwo PointersGreedy
Medium▶ Mock
141.Linked List Cycle
Hash TableLinked ListTwo Pointers
Easy▶ Mock
986.Interval List Intersections
ArrayTwo PointersSweep Line
Medium▶ Mock
287.Find the Duplicate Number
ArrayTwo PointersBinary Search
Medium▶ Mock
28.Find the Index of the First Occurrence in a String
Two PointersStringString Matching
Easy▶ Mock
1048.Longest String Chain
ArrayHash TableTwo Pointers
Medium▶ Mock
845.Longest Mountain in Array
ArrayTwo PointersDynamic Programming
Medium▶ Mock
658.Find K Closest Elements
ArrayTwo PointersBinary Search
Medium▶ Mock
1768.Merge Strings Alternately
Two PointersString
Easy▶ Mock
27.Remove Element
ArrayTwo Pointers
Easy▶ Mock
3649.Number of Perfect Pairs
ArrayMathTwo Pointers
Medium▶ Mock
443.String Compression
Two PointersString
Medium▶ Mock
1650.Lowest Common Ancestor of a Binary Tree III
Hash TableTwo PointersTree
Medium▶ Mock
Happy Number
Hash TableMathTwo Pointers
Easy+1▶ Mock
244.Shortest Word Distance II
ArrayHash TableTwo Pointers
Medium▶ Mock
272.Closest Binary Search Tree Value II
Two PointersStackTree
Hard▶ Mock
475.Heaters
ArrayTwo PointersBinary Search
Medium▶ Mock
696.Count Binary Substrings
Two PointersString
Easy▶ Mock
723.Candy Crush
ArrayTwo PointersMatrix
Medium▶ Mock
838.Push Dominoes
Two PointersStringDynamic Programming
Medium▶ Mock
1055.Shortest Way to Form String
Two PointersStringBinary Search
Medium▶ Mock
1963.Minimum Number of Swaps to Make the String Balanced
Two PointersStringStack
Medium▶ Mock
2491.Divide Players Into Teams of Equal Skill
ArrayHash TableTwo Pointers
Medium▶ Mock

Practice with a Mock Interview

Solve these Two Pointers problems under real interview pressure with our AI interviewer.

Start Mock Interview →