Epam Systems vs Twitter Interview Questions
Epam Systems lists 46 LeetCode interview questions while Twitter lists 53. They share 6 problems — 13% of Epam Systems's bank and 11% of Twitter's. Focus on the overlap first, then drill into 40 Epam Systems-only and 47 Twitter-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 6 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Epam Systems and Twitter.
Step 2 — Company-specific depth: Add Epam Systems-specific problems like Two Sum, Longest Substring Without Repeating Characters, Minimum Operations to Make a Uni-Value Grid and Twitter-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Twitter skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
6 Shared Questions
High-priority problems to practice for both Epam Systems and Twitter.
| Problem | Difficulty |
|---|---|
| Valid Parentheses | Easy |
| Trapping Rain Water | Hard |
| Merge Intervals | Medium |
| LRU Cache | Medium |
| Multiply Strings | Medium |
| Reverse Linked List | Easy |
Unique to Epam Systems (40)
Problems in Epam Systems's list that do not appear at Twitter.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Longest Substring Without Repeating Characters | Medium |
| Minimum Operations to Make a Uni-Value Grid | Medium |
| Move Zeroes | Easy |
| Longest Common Prefix | Easy |
| Longest Palindromic Substring | Medium |
| Merge Sorted Array | Easy |
| Valid Anagram | Easy |
| Best Time to Buy and Sell Stock | Easy |
| Group Anagrams | Medium |
| Rotate Array | Medium |
| Reverse String | Easy |
Unique to Twitter (47)
Problems in Twitter's list that do not appear at Epam Systems.
| Problem | Difficulty |
|---|---|
| Regular Expression Matching | Hard |
| Integer to Roman | Medium |
| Merge k Sorted Lists | Hard |
| Wildcard Matching | Hard |
| Permutation Sequence | Hard |
| Pascal's Triangle | Easy |
| Word Break II | Hard |
| Time Needed to Buy Tickets | Easy |
| Max Points on a Line | Hard |
| One Edit Distance | Medium |
| Happy Number | Easy |
| Implement Trie (Prefix Tree) | Medium |
Frequently Asked Questions
How many LeetCode questions do Epam Systems and Twitter share?
Epam Systems and Twitter share 6 LeetCode interview questions. 40 problems appear only in Epam Systems's list and 47 appear only in Twitter's list.
What topics overlap most between Epam Systems and Twitter?
The most common shared topics between Epam Systems and Twitter are String (2 shared questions), Stack (2 shared questions), Array (2 shared questions), Linked List (2 shared questions), Two Pointers (1 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Epam Systems or Twitter?
Epam Systems has 16 Easy, 27 Medium, and 3 Hard questions. Twitter has 8 Easy, 33 Medium, and 12 Hard questions. Twitter has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Epam Systems and Twitter?
Start with the 6 shared problems since they cover what both companies ask most often. Then add 20 Epam Systems-specific and 20 Twitter-specific questions to round out your prep.