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DSA Corner

Dashboard Questions Topics Companies Sheets

Twitter Interview Questions

44 coding problems asked in Twitter interviews. Prepare for your technical interview with real questions.

44

Problems

4

Easy

29

Medium

11

Hard

Difficulty

All44 Easy4 Medium29 Hard11

Status	Title	Video	Leetcode	Solve	Difficulty	Companies	Topics
	56. Merge Intervals			Solve	Medium	Adobe+24	Array Sorting
	78. Subsets			Solve	Medium	Adobe+9	Array Backtracking+1
	79. Word Search			Solve	Medium	Amazon+8	Array Backtracking+2
	208. Implement Trie (Prefix Tree)			Solve	Medium	Amazon+8	Design Hash Table+2
	256. Paint House			Solve	Medium	Amazon+2	Array Dynamic Programming
	341. Flatten Nested List Iterator			Solve	Medium	Airbnb+10	Depth-First Search Design+4
	362. Design Hit Counter			Solve	Medium	Affirm+7	Array Binary Search+3
	380. Insert Delete GetRandom O(1)			Solve	Medium	Affirm+8	Array Design+3
	433. Minimum Genetic Mutation			Solve	Medium	Amazon+4	Breadth-First Search Hash Table+1
	453. Minimum Moves to Equal Array Elements			Solve	Medium	Goldman Sachs+3	Array Math
	528. Random Pick with Weight			Solve	Medium	Amazon+7	Array Binary Search+3
	580. Count Student Number in Departments			Solve	Medium	Twitter	Database
	585. Investments in 2016			Solve	Medium	Twitter	Database
	608. Tree Node			Solve	Medium	Microsoft+1	Database
	635. Design Log Storage System			Solve	Medium	Twitter	Design Hash Table+2
	647. Palindromic Substrings			Solve	Medium	Expedia+2	Dynamic Programming String+1
	721. Accounts Merge			Solve	Medium	Amazon+6	Array Breadth-First Search+5
	831. Masking Personal Information			Solve	Medium	Twitter	String
	921. Minimum Add to Make Parentheses Valid			Solve	Medium	Amazon+3	Greedy Stack+1
	1347. Minimum Number of Steps to Make Two Strings Anagram			Solve	Medium	Bloomberg+5	Counting Hash Table+1
	1348. Tweet Counts Per Frequency			Solve	Medium	Twitter	Binary Search Design+3
	1459. Rectangles Area			Solve	Medium	Twitter	Database
	1785. Minimum Elements to Add to Form a Given Sum			Solve	Medium	Twitter	Array Greedy
	1797. Design Authentication Manager			Solve	Medium	Twitter	Design Doubly-Linked List+2
	1817. Finding the Users Active Minutes			Solve	Medium	Twitter	Array Hash Table
	1868. Product of Two Run-Length Encoded Arrays			Solve	Medium	Facebook+1	Array Two Pointers
	1882. Process Tasks Using Servers			Solve	Medium	Amazon+4	Array Heap (Priority Queue)
	1905. Count Sub Islands			Solve	Medium	DoorDash+1	Array Breadth-First Search+3
	2768. Number of Black Blocks			Solve	Medium	Square+1	Array Enumeration+1

Merge Intervals

Medium✓ Solution📹 Video

Adobe+24

Subsets

Medium✓ Solution📹 Video

Adobe+9

Array Backtracking Bit Manipulation

Word Search

Medium✓ Solution📹 Video

Amazon+8

Array Backtracking Matrix+1

Implement Trie (Prefix Tree)

Medium✓ Solution📹 Video

Amazon+8

Design Hash Table String+1

Paint House

Medium✓ Solution📹 Video

Amazon+2

Array Dynamic Programming

Flatten Nested List Iterator

Medium✓ Solution📹 Video

Airbnb+10

Depth-First Search Design Iterator+3

Design Hit Counter

Medium✓ Solution📹 Video

Affirm+7

Array Binary Search Data Stream+2

Insert Delete GetRandom O(1)

Medium✓ Solution📹 Video

Affirm+8

Array Design Hash Table+2

Minimum Genetic Mutation

Medium✓ Solution📹 Video

Amazon+4

Breadth-First Search Hash Table String

Minimum Moves to Equal Array Elements

Medium✓ Solution📹 Video

Goldman Sachs+3

Random Pick with Weight

Medium✓ Solution📹 Video

Amazon+7

Array Binary Search Math+2

Count Student Number in Departments

Medium✓ Solution📹 Video

Twitter

Investments in 2016

Medium✓ Solution📹 Video

Twitter

Tree Node

Medium✓ Solution📹 Video

Microsoft+1

Design Log Storage System

Medium✓ Solution📹 Video

Twitter

Design Hash Table Ordered Set+1

Palindromic Substrings

Medium✓ Solution📹 Video

Expedia+2

Dynamic Programming String Two Pointers

Accounts Merge

Medium✓ Solution📹 Video

Amazon+6

Array Breadth-First Search Depth-First Search+4

Masking Personal Information

Medium📹 Video

Twitter

Minimum Add to Make Parentheses Valid

Medium✓ Solution📹 Video

Amazon+3

Greedy Stack String

Minimum Number of Steps to Make Two Strings Anagram

Medium✓ Solution📹 Video

Bloomberg+5

Counting Hash Table String

Tweet Counts Per Frequency

Medium📹 Video

Twitter

Binary Search Design Hash Table+2

Rectangles Area

Medium📹 Video

Twitter

Minimum Elements to Add to Form a Given Sum

Medium📹 Video

Twitter

Design Authentication Manager

Medium📹 Video

Twitter

Design Doubly-Linked List Hash Table+1

Finding the Users Active Minutes

Medium📹 Video

Twitter

Array Hash Table

Product of Two Run-Length Encoded Arrays

Medium📹 Video

Facebook+1

Array Two Pointers

Process Tasks Using Servers

Medium📹 Video

Amazon+4

Array Heap (Priority Queue)

Count Sub Islands

Medium✓ Solution📹 Video

DoorDash+1

Array Breadth-First Search Depth-First Search+2

Number of Black Blocks

Medium📹 Video

Square+1

Array Enumeration Hash Table