Interview Prep/Companies/Apple

Apple

100 questions tracked100 with solutions

🔍

Frequency scoreSorted highest → lowest frequency✓ Our Solution = we have a detailed walkthrough

Showing 100 of 100 questions

EasyTwo Sum✓ Our Solution

100

ArrayHash Table

LeetCode ↗56% acc.

MediumLongest Substring Without Repeating Characters✓ Our Solution

Hash TableStringSliding Window

LeetCode ↗37% acc.

EasyLongest Common Prefix✓ Our Solution

StringTrie

LeetCode ↗45% acc.

EasyValid Parentheses✓ Our Solution

StringStack

LeetCode ↗42% acc.

HardMedian of Two Sorted Arrays✓ Our Solution

ArrayBinary SearchDivide and Conquer

LeetCode ↗44% acc.

MediumMerge Intervals✓ Our Solution

ArraySorting

LeetCode ↗49% acc.

MediumGroup Anagrams✓ Our Solution

ArrayHash TableStringSorting

LeetCode ↗71% acc.

EasyMerge Sorted Array✓ Our Solution

ArrayTwo PointersSorting

LeetCode ↗53% acc.

HardTrapping Rain Water✓ Our Solution

ArrayTwo PointersDynamic ProgrammingStack+1

LeetCode ↗65% acc.

MediumReverse Integer✓ Our Solution

Math

LeetCode ↗30% acc.

MediumValid Sudoku✓ Our Solution

ArrayHash TableMatrix

LeetCode ↗62% acc.

EasyClimbing Stairs✓ Our Solution

MathDynamic ProgrammingMemoization

LeetCode ↗54% acc.

MediumLongest Palindromic Substring✓ Our Solution

Two PointersStringDynamic Programming

LeetCode ↗36% acc.

EasyPalindrome Number✓ Our Solution

Math

LeetCode ↗59% acc.

MediumRotate Image✓ Our Solution

ArrayMathMatrix

LeetCode ↗78% acc.

MediumSpiral Matrix✓ Our Solution

ArrayMatrixSimulation

LeetCode ↗54% acc.

MediumAdd Two Numbers✓ Our Solution

Linked ListMathRecursion

LeetCode ↗46% acc.

Medium3Sum✓ Our Solution

ArrayTwo PointersSorting

LeetCode ↗37% acc.

EasyRoman to Integer✓ Our Solution

Hash TableMathString

LeetCode ↗65% acc.

EasyRemove Duplicates from Sorted Array✓ Our Solution

ArrayTwo Pointers

LeetCode ↗60% acc.

MediumSearch in Rotated Sorted Array✓ Our Solution

ArrayBinary Search

LeetCode ↗43% acc.

EasySqrt(x)✓ Our Solution

MathBinary Search

LeetCode ↗40% acc.

MediumMaximum Subarray✓ Our Solution

ArrayDivide and ConquerDynamic Programming

LeetCode ↗52% acc.

EasyMerge Two Sorted Lists✓ Our Solution

Linked ListRecursion

LeetCode ↗67% acc.

MediumGenerate Parentheses✓ Our Solution

StringDynamic ProgrammingBacktracking

LeetCode ↗77% acc.

HardMerge k Sorted Lists✓ Our Solution

Linked ListDivide and ConquerHeap (Priority Queue)Merge Sort

LeetCode ↗57% acc.

MediumContainer With Most Water✓ Our Solution

ArrayTwo PointersGreedy

LeetCode ↗58% acc.

EasyFind the Index of the First Occurrence in a String✓ Our Solution

Two PointersStringString Matching

LeetCode ↗45% acc.

EasyRemove Element✓ Our Solution

ArrayTwo Pointers

LeetCode ↗60% acc.

EasySearch Insert Position✓ Our Solution

ArrayBinary Search

LeetCode ↗49% acc.

MediumLetter Combinations of a Phone Number✓ Our Solution

Hash TableStringBacktracking

LeetCode ↗64% acc.

HardRegular Expression Matching✓ Our Solution

StringDynamic ProgrammingRecursion

LeetCode ↗29% acc.

MediumRemove Nth Node From End of List✓ Our Solution

Linked ListTwo Pointers

LeetCode ↗49% acc.

MediumInsert Interval✓ Our Solution

Array

LeetCode ↗43% acc.

HardLargest Rectangle in Histogram✓ Our Solution

ArrayStackMonotonic Stack

LeetCode ↗47% acc.

EasyAdd Binary✓ Our Solution

MathStringBit ManipulationSimulation

LeetCode ↗56% acc.

MediumPermutations✓ Our Solution

ArrayBacktracking

LeetCode ↗81% acc.

EasyMaximum Depth of Binary Tree✓ Our Solution

TreeDepth-First SearchBreadth-First SearchBinary Tree

LeetCode ↗77% acc.

MediumBinary Tree Level Order Traversal✓ Our Solution

TreeBreadth-First SearchBinary Tree

LeetCode ↗71% acc.

MediumFind First and Last Position of Element in Sorted Array✓ Our Solution

ArrayBinary Search

LeetCode ↗47% acc.

MediumNext Permutation✓ Our Solution

ArrayTwo Pointers

LeetCode ↗43% acc.

MediumCombination Sum✓ Our Solution

ArrayBacktracking

LeetCode ↗75% acc.

MediumSort Colors✓ Our Solution

ArrayTwo PointersSorting

LeetCode ↗68% acc.

MediumJump Game✓ Our Solution

ArrayDynamic ProgrammingGreedy

LeetCode ↗39% acc.

Medium4Sum✓ Our Solution

ArrayTwo PointersSorting

LeetCode ↗38% acc.

EasySymmetric Tree✓ Our Solution

TreeDepth-First SearchBreadth-First SearchBinary Tree

LeetCode ↗59% acc.

MediumString to Integer (atoi)✓ Our Solution

String

LeetCode ↗19% acc.

MediumValidate Binary Search Tree✓ Our Solution

TreeDepth-First SearchBinary Search TreeBinary Tree

LeetCode ↗34% acc.

HardFirst Missing Positive✓ Our Solution

ArrayHash Table

LeetCode ↗41% acc.

MediumPow(x, n)✓ Our Solution

MathRecursion

LeetCode ↗37% acc.

EasyPlus One✓ Our Solution

ArrayMath

LeetCode ↗48% acc.

MediumInterleaving String✓ Our Solution

StringDynamic Programming

LeetCode ↗42% acc.

MediumJump Game II✓ Our Solution

ArrayDynamic ProgrammingGreedy

LeetCode ↗42% acc.

MediumWord Search✓ Our Solution

ArrayStringBacktrackingDepth-First Search+1

LeetCode ↗45% acc.

MediumSearch a 2D Matrix✓ Our Solution

ArrayBinary SearchMatrix

LeetCode ↗52% acc.

MediumReverse Linked List II✓ Our Solution

Linked List

LeetCode ↗50% acc.

MediumDivide Two Integers✓ Our Solution

MathBit Manipulation

LeetCode ↗18% acc.

EasyBinary Tree Inorder Traversal✓ Our Solution

StackTreeDepth-First SearchBinary Tree

LeetCode ↗79% acc.

HardWildcard Matching✓ Our Solution

StringDynamic ProgrammingGreedyRecursion

LeetCode ↗30% acc.

EasyBalanced Binary Tree✓ Our Solution

TreeDepth-First SearchBinary Tree

LeetCode ↗55% acc.

MediumSet Matrix Zeroes✓ Our Solution

ArrayHash TableMatrix

LeetCode ↗61% acc.

MediumCount and Say✓ Our Solution

String

LeetCode ↗61% acc.

EasyRemove Duplicates from Sorted List✓ Our Solution

Linked List

LeetCode ↗55% acc.

HardN-Queens✓ Our Solution

ArrayBacktracking

LeetCode ↗73% acc.

MediumSwap Nodes in Pairs✓ Our Solution

Linked ListRecursion

LeetCode ↗67% acc.

HardText Justification✓ Our Solution

ArrayStringSimulation

LeetCode ↗48% acc.

MediumSimplify Path✓ Our Solution

StringStack

LeetCode ↗48% acc.

MediumSubsets✓ Our Solution

ArrayBacktrackingBit Manipulation

LeetCode ↗81% acc.

HardMinimum Window Substring✓ Our Solution

Hash TableStringSliding Window

LeetCode ↗45% acc.

MediumZigzag Conversion✓ Our Solution

String

LeetCode ↗52% acc.

MediumDecode Ways✓ Our Solution

StringDynamic Programming

LeetCode ↗37% acc.

MediumMinimum Path Sum✓ Our Solution

ArrayDynamic ProgrammingMatrix

LeetCode ↗66% acc.

MediumInteger to Roman✓ Our Solution

Hash TableMathString

LeetCode ↗69% acc.

HardReverse Nodes in k-Group✓ Our Solution

Linked ListRecursion

LeetCode ↗63% acc.

MediumRotate List✓ Our Solution

Linked ListTwo Pointers

LeetCode ↗40% acc.

MediumPartition List✓ Our Solution

Linked ListTwo Pointers

LeetCode ↗59% acc.

EasyConvert Sorted Array to Binary Search Tree✓ Our Solution

ArrayDivide and ConquerTreeBinary Search Tree+1

LeetCode ↗74% acc.

MediumCombinations✓ Our Solution

Backtracking

LeetCode ↗73% acc.

MediumEdit Distance✓ Our Solution

StringDynamic Programming

LeetCode ↗59% acc.

HardSudoku Solver✓ Our Solution

ArrayHash TableBacktrackingMatrix

LeetCode ↗64% acc.

EasySame Tree✓ Our Solution

TreeDepth-First SearchBreadth-First SearchBinary Tree

LeetCode ↗65% acc.

MediumRemove Duplicates from Sorted List II✓ Our Solution

Linked ListTwo Pointers

LeetCode ↗50% acc.

EasyLength of Last Word✓ Our Solution

String

LeetCode ↗56% acc.

MediumRestore IP Addresses✓ Our Solution

StringBacktracking

LeetCode ↗53% acc.

MediumUnique Binary Search Trees II✓ Our Solution

Dynamic ProgrammingBacktrackingTreeBinary Search Tree+1

LeetCode ↗60% acc.

HardMaximal Rectangle✓ Our Solution

ArrayDynamic ProgrammingStackMatrix+1

LeetCode ↗54% acc.

MediumConstruct Binary Tree from Preorder and Inorder Traversal✓ Our Solution

ArrayHash TableDivide and ConquerTree+1

LeetCode ↗67% acc.

MediumMultiply Strings✓ Our Solution

MathStringSimulation

LeetCode ↗42% acc.

MediumPermutations II✓ Our Solution

ArrayBacktrackingSorting

LeetCode ↗62% acc.

Medium3Sum Closest✓ Our Solution

ArrayTwo PointersSorting

LeetCode ↗47% acc.

MediumUnique Paths✓ Our Solution

MathDynamic ProgrammingCombinatorics

LeetCode ↗66% acc.

HardValid Number✓ Our Solution

String

LeetCode ↗22% acc.

HardSubstring with Concatenation of All Words✓ Our Solution

Hash TableStringSliding Window

LeetCode ↗33% acc.

MediumRemove Duplicates from Sorted Array II✓ Our Solution

ArrayTwo Pointers

LeetCode ↗63% acc.

MediumSearch in Rotated Sorted Array II✓ Our Solution

ArrayBinary Search

LeetCode ↗39% acc.

MediumUnique Paths II✓ Our Solution

ArrayDynamic ProgrammingMatrix

LeetCode ↗43% acc.

MediumRecover Binary Search Tree✓ Our Solution

TreeDepth-First SearchBinary Search TreeBinary Tree

LeetCode ↗56% acc.

MediumUnique Binary Search Trees✓ Our Solution

MathDynamic ProgrammingTreeBinary Search Tree+1

LeetCode ↗62% acc.

MediumSubsets II✓ Our Solution

ArrayBacktrackingBit Manipulation

LeetCode ↗60% acc.

100

MediumFlatten Binary Tree to Linked List✓ Our Solution

Linked ListStackTreeDepth-First Search+1

LeetCode ↗69% acc.