Google

Typical loop

1. 1Recruiter screen
2. 2Phone screen: one 45-minute coding interview
3. 3Onsite: 3-4 coding rounds plus system design (level-dependent)
4. 4Googleyness & leadership round
5. 5Hiring committee review

Questions

Callback's practice questions and the LeetCode questions Google has been asking, filtered together.

Practice questions

Asked on LeetCode

2,344 questions · all time

• Two SumeasyArrayHash Tablefrequency 100.0
• Add Two NumbersmediumLinked ListMathRecursionfrequency 78.6
• Median of Two Sorted ArrayshardArrayBinary SearchDivide and Conquerfrequency 73.9
• Trapping Rain WaterhardArrayTwo PointersDynamic ProgrammingStack+1frequency 73.9
• Longest Common PrefixeasyArrayStringTriefrequency 73.2
• Palindrome NumbereasyMathfrequency 73.2
• Longest Substring Without Repeating CharactersmediumHash TableStringSliding Windowfrequency 72.5
• 3SummediumArrayTwo PointersSortingfrequency 72.3
• Best Time to Buy and Sell StockeasyArrayDynamic Programmingfrequency 71.7
• Merge Sorted ArrayeasyArrayTwo PointersSortingfrequency 71.4
• Longest Consecutive SequencemediumArrayHash TableUnion-Findfrequency 69.6
• Longest Palindromic SubstringmediumTwo PointersStringDynamic ProgrammingManacherfrequency 69.5
• Merge Strings AlternatelyeasyTwo PointersStringfrequency 69.5
• Create Hello World Functioneasyfrequency 69.4
• Container With Most WatermediumArrayTwo PointersGreedyfrequency 68.1
• Majority ElementeasyArrayHash TableDivide and ConquerSorting+2frequency 66.6
• Valid ParentheseseasyStringStackBracket Sequencesfrequency 66.4
• Recyclable and Low Fat ProductseasyDatabasefrequency 66.0
• Reverse IntegermediumMathfrequency 65.6
• Roman to IntegereasyHash TableMathStringfrequency 65.6
• Remove Duplicates from Sorted ArrayeasyArrayTwo Pointersfrequency 65.5
• Subarray Sum Equals KmediumArrayHash TablePrefix Sumfrequency 65.5
• Merge IntervalsmediumArraySortingQuicksortfrequency 65.4
• Number of IslandsmediumArrayDepth-First SearchBreadth-First SearchUnion-Find+1frequency 65.3
• Maximum SubarraymediumArrayDivide and ConquerDynamic Programmingfrequency 64.7
• Climbing StairseasyMathDynamic ProgrammingMemoizationfrequency 63.5
• Merge Two Sorted ListseasyLinked ListRecursionfrequency 61.8
• Generate ParenthesesmediumStringDynamic ProgrammingBacktrackingBracket Sequencesfrequency 61.4
• Next PermutationmediumArrayTwo Pointersfrequency 60.7
• Reverse Linked ListeasyLinked ListRecursionfrequency 59.3
• Spiral MatrixmediumArrayMatrixSimulationfrequency 59.0
• Meeting Rooms IImediumArrayTwo PointersGreedySorting+2frequency 58.8
• Concatenation of ArrayeasyArraySimulationfrequency 58.6
• Add Two IntegerseasyMathfrequency 58.5
• Decode StringmediumStringStackRecursionfrequency 58.3
• Move ZeroeseasyArrayTwo Pointersfrequency 58.3
• Koko Eating BananasmediumArrayBinary Searchfrequency 58.2
• Remove ElementeasyArrayTwo Pointersfrequency 57.9
• Search in Rotated Sorted ArraymediumArrayBinary Searchfrequency 57.9
• LRU CachemediumHash TableLinked ListDesignDoubly-Linked Listfrequency 57.6
• Split Array Largest SumhardArrayBinary SearchDynamic ProgrammingGreedy+1frequency 57.6
• Top K Frequent ElementsmediumArrayHash TableDivide and ConquerSorting+4frequency 57.6
• N-QueenshardArrayBacktrackingAlgorithm Xfrequency 57.4
• House RobbermediumArrayDynamic Programmingfrequency 57.2
• Letter Combinations of a Phone NumbermediumHash TableStringBacktrackingfrequency 57.2
• Valid AnagrameasyHash TableStringSortingfrequency 57.2
• 4SummediumArrayTwo PointersSortingfrequency 57.1
• Jump GamemediumArrayDynamic ProgrammingGreedyfrequency 57.1
• Pascal's TriangleeasyArrayDynamic Programmingfrequency 57.1
• Single NumbereasyArrayBit Manipulationfrequency 57.1