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Siemens LeetCode Questions 2026

Browse LeetCode problems frequently asked by Siemens. Filter by difficulty and timeframe to focus your interview prep.

Last updated: 20 Feb 2026

Timeframe

Difficulty

Problem	Difficulty	Frequency	Topics
Two Sum	EASY	75%	ArrayHash Table
Valid Parentheses	EASY	75%	StringStack
Merge Two Sorted Lists	EASY	75%	Linked ListRecursion
First Missing Positive	HARD	62.5%	ArrayHash Table
Merge Intervals	MEDIUM	87.5%	ArraySorting
Peaks in Array	HARD	100%	ArrayBinary Indexed TreeSegment Tree
Minimized Maximum of Products Distributed to Any Store	MEDIUM	100%	ArrayBinary SearchGreedy
Number of Islands	MEDIUM	100%	ArrayDepth-First SearchBreadth-First SearchUnion-FindMatrix
Reverse Linked List	EASY	75%	Linked ListRecursion
Contains Duplicate	EASY	62.5%	ArrayHash TableSorting
Rotate List	MEDIUM	62.5%	Linked ListTwo Pointers
Valid Anagram	EASY	62.5%	Hash TableStringSorting
Palindrome Linked List	EASY	62.5%	Linked ListTwo PointersStackRecursion
Maximum Product of Three Numbers	EASY	62.5%	ArrayMathSorting
Angle Between Hands of a Clock	MEDIUM	62.5%	Math
Remove Duplicates from Sorted Array	EASY	62.5%	ArrayTwo Pointers
Group Anagrams	MEDIUM	62.5%	ArrayHash TableStringSorting
The Skyline Problem	HARD	75%	ArrayDivide and ConquerBinary Indexed TreeSegment TreeSweep LineSortingHeap (Priority Queue)Ordered Set
Minimum Add to Make Parentheses Valid	MEDIUM	62.5%	StringStackGreedy
LRU Cache	MEDIUM	75%	Hash TableLinked ListDesignDoubly-Linked List

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