EPAM Systems Interview Questions (51)

Practice real interview problems from EPAM Systems

Title	Solution	Practice	Difficulty	Companies	Topics
1. Two Sum	Solution	Solve	Easy	Accenture+128	Array Hash Table
2. Add Two Numbers	Solution	Solve	Medium	Accenture+37	Linked List Math+1
3. Longest Substring Without Repeating Characters	Solution	Solve	Medium	Accenture+111	Hash Table Sliding Window+1
5. Longest Palindromic Substring	Solution	Solve	Medium	Accenture+75	Dynamic Programming String+1
7. Reverse Integer	Solution	Solve	Medium	Accenture+25	Math
9. Palindrome Number	Solution	Solve	Easy	Accenture+34	Math
13. Roman to Integer	Solution	Solve	Easy	Accenture+44	Hash Table Math+1
14. Longest Common Prefix	Solution	Solve	Easy	Accenture+56	String Trie
15. 3Sum	Solution	Solve	Medium	Accenture+60	Array Sorting+1
20. Valid Parentheses	Solution	Solve	Easy	Accenture+118	Stack String
22. Generate Parentheses	Solution	Solve	Medium	Accenture+39	Backtracking Dynamic Programming+1
26. Remove Duplicates from Sorted Array	Solution	Solve	Easy	Accenture+27	Array Two Pointers
33. Search in Rotated Sorted Array	Solution	Solve	Medium	Accolite+54	Array Binary Search
41. First Missing Positive	Solution	Solve	Hard	Adobe+34	Array Hash Table
42. Trapping Rain Water	Solution	Solve	Hard	Accenture+77	Array Dynamic Programming+3
43. Multiply Strings	Solution	Solve	Medium	Amazon+16	Math Simulation+1
49. Group Anagrams	Solution	Solve	Medium	Accolite+90	Array Hash Table+2
50. Pow(x, n)	Solution	Solve	Medium	Accenture+22	Math Recursion
53. Maximum Subarray	Solution	Solve	Medium	Accenture+65	Array Divide and Conquer+1
56. Merge Intervals	Solution	Solve	Medium	Accenture+108	Array Sorting
62. Unique Paths	Solution	Solve	Medium	Accenture+21	Combinatorics Dynamic Programming+1
72. Edit Distance	Solution	Solve	Medium	Accenture+30	Dynamic Programming String
88. Merge Sorted Array	Solution	Solve	Easy	Accenture+41	Array Sorting+1
92. Reverse Linked List II	Solution	Solve	Medium	Adobe+17	Linked List
121. Best Time to Buy and Sell Stock	Solution	Solve	Easy	Accenture+103	Array Dynamic Programming
125. Valid Palindrome	Solution	Solve	Easy	Accenture+41	String Two Pointers
128. Longest Consecutive Sequence	Solution	Solve	Medium	Adobe+38	Array Hash Table+1
151. Reverse Words in a String	Solution	Solve	Medium	Accenture+29	String Two Pointers
167. Two Sum II - Input Array Is Sorted	Solution	Solve	Medium	Adobe+16	Array Binary Search+1
182. Duplicate Emails	Solution	Solve	Easy	Amazon+6	Database
189. Rotate Array	Solution	Solve	Medium	Accenture+29	Array Math+1
198. House Robber	Solution	Solve	Medium	Accenture+37	Array Dynamic Programming
206. Reverse Linked List	Solution	Solve	Easy	Accenture+35	Linked List Recursion
215. Kth Largest Element in an Array	Solution	Solve	Medium	Accenture+44	Array Divide and Conquer+3
242. Valid Anagram	Solution	Solve	Easy	Accenture+40	Hash Table Sorting+1
283. Move Zeroes	Solution	Solve	Easy	Accenture+48	Array Two Pointers
322. Coin Change	Solution	Solve	Medium	Accenture+41	Array Breadth-First Search+1
344. Reverse String	Solution	Solve	Easy	Accenture+15	String Two Pointers
345. Reverse Vowels of a String	Solution	Solve	Easy	Accenture+11	String Two Pointers
347. Top K Frequent Elements	Solution	Solve	Medium	Adobe+50	Array Bucket Sort+6
387. First Unique Character in a String	Solution	Solve	Easy	Accenture+24	Counting Hash Table+2
416. Partition Equal Subset Sum	Solution	Solve	Medium	Amazon+16	Array Dynamic Programming
443. String Compression	Solution	Solve	Medium	Adobe+42	String Two Pointers
451. Sort Characters By Frequency	Solution	Solve	Medium	Accenture+16	Bucket Sort Counting+4
704. Binary Search	Solution	Solve	Easy	Adobe+12	Array Binary Search
735. Asteroid Collision	Solution	Solve	Medium	Accolite+34	Array Simulation+1
1026. Maximum Difference Between Node and Ancestor	Solution	Solve	Medium	Amazon+4	Binary Tree Depth-First Search+1
1480. Running Sum of 1d Array	Solution	Solve	Easy	Adobe+7	Array Prefix Sum
1907. Count Salary Categories	Solution	Solve	Medium	Amazon+5	Database
2033. Minimum Operations to Make a Uni-Value Grid	Solution	Solve	Medium	EPAM Systems+3	Array Math+2