Coding Interview Questions

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Interview Questions

No.	Questions
	Amazon
1	Two Sum
2	Add Two Numbers
3	Longest Substring Without Repeating Characters
4	Median of Two Sorted Arrays
5	Longest Palindromic Substring
6	ZigZag Conversion
7	String to Integer (atoi)
8	3Sum
9	Letter Combinations of a Phone Number
10	Valid Parentheses
11	Merge Two Sorted Lists
12	Generate Parentheses
13	Merge k Sorted Lists
14	Trapping Rain Water
15	Permutations
16	Rotate Image
17	Group Anagrams
18	Merge Intervals
19	Spiral Matrix II
20	Unique Paths II
21	Minimum Path Sum
22	Edit Distance
23	Set Matrix Zeroes
24	Sort Colors
25	Minimum Window Substring
26	Subsets
27	Gray Code
28	Validate Binary Search Tree
29	Same Tree
30	Binary Tree Level Order Traversal
31	Path Sum II
32	Pascal's Triangle II
33	Best Time to Buy and Sell Stock
34	Word Ladder II
35	Word Ladder
36	Sum Root to Leaf Numbers
37	Copy List with Random Pointer
38	Word Break
39	Linked List Cycle
40	LRU Cache
41	Sort List
42	Min Stack
43	Intersection of Two Linked Lists
44	Two Sum II - Input array is sorted
45	Binary Search Tree Iterator
46	Rotate Array
47	Binary Tree Right Side View
48	Number of Islands
49	Happy Number
50	Count Primes
51	Reverse Linked List
52	Word Search II
53	Kth Largest Element in an Array
54	Basic Calculator
55	Palindrome Linked List
56	Lowest Common Ancestor of a Binary Search Tree
57	Lowest Common Ancestor of a Binary Tree
58	Product of Array Except Self
59	Sliding Window Maximum
60	Search a 2D Matrix II
61	Valid Anagram
62	Find Median from Data Stream
63	Serialize and Deserialize Binary Tree
64	Top K Frequent Elements
65	Design Twitter
66	Insert Delete GetRandom O(1)
67	Shuffle an Array
68	First Unique Character in a String
69	Rotate Function
70	Third Maximum Number
71	Battleships in a Board
72	Find All Anagrams in a String
73	String Compression
74	Serialize and Deserialize BST
75	Sort Characters By Frequency
76	Repeated Substring Pattern
77	LFU Cache
78	Concatenated Words
79	Most Frequent Subtree Sum
80	Longest Palindromic Subsequence
81	Super Washing Machines
82	Minesweeper
83	K-diff Pairs in an Array
84	Encode and Decode TinyURL
85	Complex Number Multiplication
86	Convert BST to Greater Tree
87	01 Matrix
88	Optimal Division
89	Subarray Sum Equals K
90	Subtree of Another Tree
91	Shortest Unsorted Continuous Subarray
92	Construct String from Binary Tree
93	Merge Two Binary Trees
94	Solve the Equation
95	Set Mismatch
96	Maximum Length of Pair Chain
97	Image Smoother
98	Maximum Width of Binary Tree
99	Cut Off Trees for Golf Event
100	Baseball Game
101	Top K Frequent Words
102	Accounts Merge
103	Find Pivot Index
104	Split Linked List in Parts
105	Monotone Increasing Digits
106	Min Cost Climbing Stairs
107	Prime Number of Set Bits in Binary Representation
108	Partition Labels
109	Reorganize String
110	Global and Local Inversions
111	Most Common Word
112	Unique Email Addresses
113	Knight Dialer
114	Reorder Data in Log Files
115	Prison Cells After N Days
116	K Closest Points to Origin
117	Subarrays with K Different Integers
118	Rotting Oranges
119	Binary Search Tree to Greater Sum Tree
120	Distant Barcodes
121	Sum of Nodes with Even-Valued Grandparent
122	Number of Dice Rolls With Target Sum
123	Critical Connections in a Network
124	Search Suggestions System
125	Number of Steps to Reduce a Number to Zero
126	Stone Game III
	Microsoft
1	Two Sum
2	Add Two Numbers
3	Median of Two Sorted Arrays
4	Longest Palindromic Substring
5	String to Integer (atoi)
6	Roman to Integer
7	3Sum
8	Valid Parentheses
9	Merge Two Sorted Lists
10	Merge k Sorted Lists
11	Swap Nodes in Pairs
12	Reverse Nodes in k-Group
13	Remove Duplicates from Sorted Array
14	Implement strStr()
15	Search in Rotated Sorted Array
16	Maximum Subarray
17	Spiral Matrix
18	Jump Game
19	Merge Intervals
20	Binary Tree Maximum Path Sum
21	Valid Palindrome
22	Copy List with Random Pointer
23	Linked List Cycle
24	LRU Cache
25	Reverse Words in a String
26	Find Minimum in Rotated Sorted Array
27	Find Peak Element
28	Excel Sheet Column Title
29	Excel Sheet Column Number
30	Binary Search Tree Iterator
31	Rotate Array
32	Number of 1 Bits
33	Number of Islands
34	Reverse Linked List
35	Implement Trie (Prefix Tree)
36	Word Search II
37	Kth Largest Element in an Array
38	The Skyline Problem
39	Delete Node in a Linked List
40	Product of Array Except Self
41	Add Digits
42	Missing Number
43	Serialize and Deserialize Binary Tree
44	First Unique Character in a String
45	Arithmetic Slices
46	String Compression
47	Max Chunks To Make Sorted
48	Valid Tic-Tac-Toe State
49	Maximum Length of a Concatenated String with Unique Characters
50	Find N Unique Integers Sum up to Zero
51	Jump Game III
52	Cinema Seat Allocation
53	Bulb Switcher III
	Facebook
1	Regular Expression Matching
2	Roman to Integer
3	3Sum
4	Letter Combinations of a Phone Number
5	Valid Parentheses
6	Merge k Sorted Lists
7	Reverse Nodes in k-Group
8	Remove Duplicates from Sorted Array
9	Implement strStr()
10	Search in Rotated Sorted Array
11	Count and Say
12	Wildcard Matching
13	Pow(x, n)
14	Merge Intervals
15	Insert Interval
16	Valid Palindrome
17	Longest Consecutive Sequence
18	Clone Graph
19	Word Break
20	LRU Cache
21	Binary Search Tree Iterator
22	Number of Islands
23	Implement Trie (Prefix Tree)
24	Kth Largest Element in an Array
25	The Skyline Problem
26	Maximal Square
27	Binary Tree Paths
28	H-Index
29	Expression Add Operators
30	Serialize and Deserialize Binary Tree
31	Flatten Nested List Iterator
32	Combination Sum IV
33	Insert Delete GetRandom O(1)
34	Target Sum
35	Encode and Decode TinyURL
36	Diameter of Binary Tree
37	Valid Palindrome II
38	Maximum Sum of 3 Non-Overlapping Subarrays
39	Sudoku Solver
40	Maximum Subarray
41	Valid Number
42	Plus One
43	Add Binary
44	Is Graph Bipartite?
45	Custom Sort String
46	Smallest Subtree with all the Deepest Nodes
47	Shortest Bridge
48	Range Sum of BST
49	Verifying an Alien Dictionary
50	K Closest Points to Origin
51	Interval List Intersections
52	Max Consecutive Ones III
53	Minimum Remove to Make Valid Parentheses
54	Merge Sorted Array
55	Binary Tree Level Order Traversal
56	Best Time to Buy and Sell Stock
57	Best Time to Buy and Sell Stock III
58	Best Time to Buy and Sell Stock IV
59	Binary Tree Maximum Path Sum
60	Fraction to Recurring Decimal
61	Simplify Path
62	Minimum Window Substring
63	Course Schedule
64	Design Add and Search Words Data Structure
65	Kth Smallest Element in a BST
66	Lowest Common Ancestor of a Binary Tree
67	Product of Array Except Self
68	Exclusive Time of Functions
69	First Bad Version
70	Move Zeroes
71	Task Scheduler
72	Remove Invalid Parentheses
73	Longest Increasing Path in a Matrix
74	Search in Rotated Sorted Array II
75	Convert a Number to Hexadecimal
76	Add Strings
77	Partition Equal Subset Sum
78	Find All Anagrams in a String
79	Continuous Subarray Sum
80	Subarray Sum Equals K