Twitter (X) Interview Questions

Curated technical problems, DSA questions & coding interview rounds

Target Role

Software Engineer (SDE I / II)

Problem Count

52+ Verified

Assessment Type

DSA & System Design

Preparation Mode

Live AI Interactive

Insert Delete GetRandom O(1)

MEDIUM

55% Acceptance100% Frequency

Array

Hash Table

Math

Design

Randomized

Flatten Nested List Iterator

MEDIUM

65% Acceptance96% Frequency

Stack

Tree

Depth-First Search

Design

Queue

+1 more

Trapping Rain Water

HARD

65% Acceptance96% Frequency

Array

Two Pointers

Dynamic Programming

Stack

Monotonic Stack

Design Twitter

MEDIUM

43% Acceptance94% Frequency

Hash Table

Linked List

Design

Heap (Priority Queue)

Tweet Counts Per Frequency

MEDIUM

45% Acceptance94% Frequency

Hash Table

Binary Search

Design

Sorting

Ordered Set

Merge Intervals

MEDIUM

49% Acceptance94% Frequency

Array

Sorting

Implement Trie (Prefix Tree)

MEDIUM

68% Acceptance94% Frequency

Hash Table

String

Design

Trie

Best Meeting Point

HARD

61% Acceptance92% Frequency

Array

Math

Sorting

Matrix

LRU Cache

MEDIUM

45% Acceptance92% Frequency

Hash Table

Linked List

Design

Doubly-Linked List

Investments in 2016

MEDIUM

50% Acceptance92% Frequency

Database

Customer Placing the Largest Number of Orders

EASY

64% Acceptance89% Frequency

Database

Minimum Genetic Mutation

MEDIUM

55% Acceptance89% Frequency

Hash Table

String

Breadth-First Search

Minimum Number of Steps to Make Two Strings Anagram

MEDIUM

82% Acceptance89% Frequency

Hash Table

String

Counting

Validate IP Address

MEDIUM

28% Acceptance89% Frequency

String

Count Student Number in Departments

MEDIUM

60% Acceptance89% Frequency

Database

Rectangles Area

MEDIUM

69% Acceptance89% Frequency

Database

Invalid Tweets

EASY

86% Acceptance89% Frequency

Database

Tree Node

MEDIUM

74% Acceptance89% Frequency

Database

Number of Black Blocks

MEDIUM

39% Acceptance89% Frequency

Array

Hash Table

Enumeration

Masking Personal Information

MEDIUM

51% Acceptance89% Frequency

String

Design Authentication Manager

MEDIUM

58% Acceptance89% Frequency

Hash Table

Linked List

Design

Doubly-Linked List

Minimum Elements to Add to Form a Given Sum

MEDIUM

44% Acceptance89% Frequency

Array

Greedy

Binary Gap

EASY

65% Acceptance89% Frequency

Bit Manipulation

Finding the Users Active Minutes

MEDIUM

80% Acceptance89% Frequency

Array

Hash Table

Process Tasks Using Servers

MEDIUM

41% Acceptance89% Frequency

Array

Heap (Priority Queue)

Remove All Occurrences of a Substring

MEDIUM

78% Acceptance89% Frequency

String

Stack

Simulation

Count Sub Islands

MEDIUM

73% Acceptance89% Frequency

Array

Depth-First Search

Breadth-First Search

Union Find

Matrix

Trapping Rain Water II

HARD

59% Acceptance89% Frequency

Array

Breadth-First Search

Heap (Priority Queue)

Matrix

Regular Expression Matching

HARD

29% Acceptance89% Frequency

String

Dynamic Programming

Recursion

Kth Smallest Element in a Sorted Matrix

MEDIUM

64% Acceptance89% Frequency

Array

Binary Search

Sorting

Heap (Priority Queue)

Matrix

Integer to Roman

MEDIUM

69% Acceptance89% Frequency

Hash Table

Math

String

Valid Parentheses

EASY

42% Acceptance89% Frequency

String

Stack

Merge k Sorted Lists

HARD

57% Acceptance89% Frequency

Linked List

Divide and Conquer

Heap (Priority Queue)

Merge Sort

Multiply Strings

MEDIUM

42% Acceptance89% Frequency

Math

String

Simulation

Wildcard Matching

HARD

30% Acceptance89% Frequency

String

Dynamic Programming

Greedy

Recursion

Permutation Sequence

HARD

50% Acceptance89% Frequency

Math

Recursion

Pascal's Triangle

EASY

77% Acceptance89% Frequency

Array

Dynamic Programming

Word Break II

HARD

54% Acceptance89% Frequency

Array

Hash Table

String

Dynamic Programming

Backtracking

+2 more

Time Needed to Buy Tickets

EASY

71% Acceptance89% Frequency

Array

Queue

Simulation

Max Points on a Line

HARD

29% Acceptance89% Frequency

Array

Hash Table

Math

Geometry

One Edit Distance

MEDIUM

34% Acceptance89% Frequency

Two Pointers

String

Happy Number

EASY

58% Acceptance89% Frequency

Hash Table

Math

Two Pointers

Reverse Linked List

EASY

79% Acceptance89% Frequency

Linked List

Recursion

The Skyline Problem

HARD

44% Acceptance89% Frequency

Array

Divide and Conquer

Binary Indexed Tree

Segment Tree

Line Sweep

+2 more

Lowest Common Ancestor of a Binary Search Tree

MEDIUM

68% Acceptance89% Frequency

Tree

Depth-First Search

Binary Search Tree

Binary Tree

Flatten 2D Vector

MEDIUM

50% Acceptance89% Frequency

Array

Two Pointers

Design

Iterator

Alien Dictionary

HARD

37% Acceptance89% Frequency

Array

String

Depth-First Search

Breadth-First Search

Graph

+1 more

Design Skiplist

HARD

58% Acceptance89% Frequency

Linked List

Design

Number of Connected Components in an Undirected Graph

MEDIUM

64% Acceptance89% Frequency

Depth-First Search

Breadth-First Search

Union Find

Graph

Random Pick with Weight

MEDIUM

48% Acceptance48% Frequency

Array

Math

Binary Search

Prefix Sum

Randomized

Number of Islands

MEDIUM

62% Acceptance48% Frequency

Array

Depth-First Search

Breadth-First Search

Union Find

Matrix

Rotting Oranges

MEDIUM

57% Acceptance48% Frequency

Array

Breadth-First Search

Matrix

How to Prepare for Twitter (X) Technical Interviews

1. Master High Frequency DSA

Review the top questions asked in Twitter (X) coding rounds over the past 3-6 months. Focus on core patterns including Arrays, Hash Tables, Trees, Dynamic Programming, and Graph Traversals.

2. Practice with AI Voice Mock Interviews

Simulate real pressure by practicing voice and video interview loops on Voke with AI calibrated specifically for Twitter (X) engineering standards and behavioral rubrics.