Easy LeetCode Interview Questions

Master 58 easy difficulty coding problems frequently asked in technical interviews at top tech companies. Perfect for building confidence and fundamental problem-solving skills.

Easy (110)Medium (260)Hard (67)

#1EasyFrequency: 100%

Two Sum

Asked at Google

Array Hash Table

Rank

#1306EasyFrequency: 100%

Minimum Absolute Difference

Asked at Oracle

Array Sorting

Rank

#680EasyFrequency: 95%

Valid Palindrome II

Asked at Meta

Two Pointers String Greedy

Rank

#88EasyFrequency: 92%

Merge Sorted Array

Asked at Microsoft

Array Two Pointers Sorting

Rank

#408EasyFrequency: 87%

Valid Word Abbreviation

Asked at Meta

Two Pointers String

Rank

#125EasyFrequency: 87%

Valid Palindrome

Asked at Oracle

Two Pointers String

Rank

#206EasyFrequency: 87%

Reverse Linked List

Asked at Oracle

Linked List Recursion

Rank

#1894EasyFrequency: 80%

Merge Strings Alternately

Asked at Google

Two Pointers String

Rank

#14EasyFrequency: 80%

Longest Common Prefix

Asked at Apple

String Trie

Rank

#70EasyFrequency: 79%

Climbing Stairs

Asked at Microsoft

Math Dynamic Programming Memoization

#10

Rank

#1908EasyFrequency: 79%

Recyclable and Low Fat Products

Asked at Microsoft

Database

#11

Rank

#2809EasyFrequency: 77%

Create Hello World Function

Asked at Google

#12

Rank

#543EasyFrequency: 74%

Diameter of Binary Tree

Asked at Meta

Tree Depth-First Search Binary Tree

#13

Rank

#27EasyFrequency: 73%

Remove Element

Asked at Microsoft

Array Two Pointers

#14

Rank

#2383EasyFrequency: 73%

Add Two Integers

Asked at Microsoft

Math

#15

Rank

#975EasyFrequency: 73%

Range Sum of BST

Asked at Meta

Tree Depth-First Search Binary Search Tree Binary Tree

#16

Rank

#1915EasyFrequency: 73%

Check if One String Swap Can Make Strings Equal

Asked at DoorDash

Hash Table String Counting

#17

Rank

#605EasyFrequency: 72%

Can Place Flowers

Asked at LinkedIn

Array Greedy

#18

Rank

#20EasyFrequency: 71%

Valid Parentheses

Asked at Apple

String Stack

#19

Rank

#121EasyFrequency: 69%

Best Time to Buy and Sell Stock

Asked at Amazon

Array Dynamic Programming

#20

Rank

#9EasyFrequency: 66%

Palindrome Number

Asked at Microsoft

Math

#21

Rank

#136EasyFrequency: 66%

Single Number

Asked at Microsoft

Array Bit Manipulation

#22

Rank

#283EasyFrequency: 66%

Move Zeroes

Asked at Microsoft

Array Two Pointers

#23

Rank

#733EasyFrequency: 66%

Flood Fill

Asked at Microsoft

Array Depth-First Search Breadth-First Search Matrix

#24

Rank

#1019EasyFrequency: 63%

Squares of a Sorted Array

Asked at Uber

Array Two Pointers Sorting

#25

Rank

#270EasyFrequency: 62%

Closest Binary Search Tree Value

Asked at Meta

Binary Search Tree Depth-First Search Binary Search Tree Binary Tree

#26

Rank

#346EasyFrequency: 62%

Moving Average from Data Stream

Asked at Meta

Array Design Queue Data Stream

#27

Rank

#415EasyFrequency: 62%

Add Strings

Asked at TikTok

Math String Simulation

#28

Rank

#1646EasyFrequency: 57%

Kth Missing Positive Number

Asked at Meta

Array Binary Search

#29

Rank

#69EasyFrequency: 56%

Sqrt(x)

Asked at Google

Math Binary Search

#30

Rank

#169EasyFrequency: 55%

Majority Element

Asked at Microsoft

Array Hash Table Divide and Conquer Sorting Counting

#31

Rank

#205EasyFrequency: 55%

Isomorphic Strings

Asked at Microsoft

Hash Table String

#32

Rank

#1128EasyFrequency: 55%

Remove All Adjacent Duplicates In String

Asked at Microsoft

String Stack

#33

Rank

#1468EasyFrequency: 55%

Check If N and Its Double Exist

Asked at Microsoft

Array Hash Table Two Pointers Binary Search Sorting

#34

Rank

#1566EasyFrequency: 55%

Check If a Word Occurs As a Prefix of Any Word in a Sentence

Asked at Microsoft

Two Pointers String String Matching

#35

Rank

#3555EasyFrequency: 55%

Final Array State After K Multiplication Operations I

Asked at Microsoft

Array Math Heap (Priority Queue)Simulation

#36

Rank

#26EasyFrequency: 53%

Remove Duplicates from Sorted Array

Asked at Google

Array Two Pointers

#37

Rank

#35EasyFrequency: 53%

Search Insert Position

Asked at Google

Array Binary Search

#38

Rank

#141EasyFrequency: 53%

Linked List Cycle

Asked at Google

Hash Table Linked List Two Pointers

#39

Rank

#232EasyFrequency: 51%

Implement Queue using Stacks

Asked at Amazon

Stack Design Queue

#40

Rank

#387EasyFrequency: 51%

First Unique Character in a String

Asked at Amazon

Hash Table String Queue Counting

#41

Rank

#21EasyFrequency: 48%

Merge Two Sorted Lists

Asked at Google

Linked List Recursion

#42

Rank

#28EasyFrequency: 48%

Find the Index of the First Occurrence in a String

Asked at Google

Two Pointers String String Matching

#43

Rank

#118EasyFrequency: 48%

Pascal's Triangle

Asked at Google

Array Dynamic Programming

#44

Rank

#234EasyFrequency: 48%

Palindrome Linked List

Asked at Google

Linked List Two Pointers Stack Recursion

#45

Rank

#2692EasyFrequency: 48%

Take Gifts From the Richest Pile

Asked at Google

Array Heap (Priority Queue)Simulation

#46

Rank

#100EasyFrequency: 43%

Same Tree

Asked at Meta

Tree Depth-First Search Breadth-First Search Binary Tree

#47

Rank

#777EasyFrequency: 43%

Toeplitz Matrix

Asked at Meta

Array Matrix

#48

Rank

#851EasyFrequency: 43%

Goat Latin

Asked at Meta

String

#49

Rank

#13EasyFrequency: 42%

Roman to Integer

Asked at Google

Hash Table Math String

#50

Rank

#66EasyFrequency: 42%

Plus One

Asked at Google

Array Math

#51

Rank

#268EasyFrequency: 42%

Missing Number

Asked at Google

Array Hash Table Math Binary Search Bit Manipulation Sorting

#52

Rank

#338EasyFrequency: 42%

Counting Bits

Asked at Google

Dynamic Programming Bit Manipulation

#53

Rank

#359EasyFrequency: 42%

Logger Rate Limiter

Asked at Google

Hash Table Design Data Stream

#54

Rank

#383EasyFrequency: 42%

Ransom Note

Asked at Google

Hash Table String Counting

#55

Rank

#163EasyFrequency: 37%

Missing Ranges

Asked at Meta

Array

#56

Rank

#104EasyFrequency: 36%

Maximum Depth of Binary Tree

Asked at Amazon

Tree Depth-First Search Breadth-First Search Binary Tree

#57

Rank

#58EasyFrequency: 33%

Length of Last Word

Asked at Google

String

#58

Rank

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