Top Google Coding Interview Questions
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Difficulty Moderate
Ninja
Hard
Easy
Problem Title
Difficulty
Avg Time to solve
Attempted
Convert binary tree to mirror tree
8
Easy
15 mins
199
Sorted Linked List to Balanced BST
10
Moderate
25 mins
69
Majority element
16
Easy
15 mins
373
Next smaller Palindrome
11
Easy
10 mins
116
Evaluation of postfix expression
10
Easy
15 mins
77
Inplace rotate matrix 90 degree
12
Easy
12 mins
101
First and Last Position of an element in Sorted Array
14
Easy
20 mins
146
Two Sum
34
Easy
10 mins
425
Rod cutting problem
31
Moderate
40 mins
523
Palindrome Partitioning
4
Hard
25 mins
178
Distinct Subsequences
12
Moderate
10 mins
313
Valid Parentheses
2
Easy
10 mins
195
Longest Consecutive Sequence
22
Moderate
40 mins
603
N Queens
19
Hard
55 mins
187
Word Break-1
25
Moderate
36 mins
200
Sudoku?
79
Moderate
40 mins
257
Replace ‘O’ With ‘X’
4
Moderate
35 mins
63
MergeSort Linked List
4
Moderate
30 mins
80
Search In Rotated Sorted Array
49
Moderate
30 mins
632
Edit Distance
4
Moderate
30 mins
373
Colorful Knapsack
23
Hard
45 mins
302
Merge Intervals
15
Moderate
20 mins
293
Gas Tank
5
Moderate
20 mins
79
Longest Common Prefix
2
Moderate
30 mins
21
Shortest Path in a Binary Matrix NEW
10
Moderate
37 mins
219
Convert binary tree to mirror tree
Easy
8 upvotes
Sorted Linked List to Balanced BST
Moderate
10 upvotes
Majority element
Easy
16 upvotes
Next smaller Palindrome
Easy
11 upvotes
Evaluation of postfix expression
Easy
10 upvotes
Inplace rotate matrix 90 degree
Easy
12 upvotes
First and Last Position of an element in Sorted Array
Easy
14 upvotes
Two Sum
Easy
34 upvotes
Rod cutting problem
Moderate
31 upvotes
Palindrome Partitioning
Hard
4 upvotes
Distinct Subsequences
Moderate
12 upvotes
Valid Parentheses
Easy
2 upvotes
Longest Consecutive Sequence
Moderate
22 upvotes
N Queens
Hard
19 upvotes
Word Break-1
Moderate
25 upvotes
Sudoku?
Moderate
79 upvotes
Replace ‘O’ With ‘X’
Moderate
4 upvotes
MergeSort Linked List
Moderate
4 upvotes
Search In Rotated Sorted Array
Moderate
49 upvotes
Edit Distance
Moderate
4 upvotes
Colorful Knapsack
Hard
23 upvotes
Merge Intervals
Moderate
15 upvotes
Gas Tank
Moderate
5 upvotes
Longest Common Prefix
Moderate
2 upvotes
Shortest Path in a Binary Matrix
Moderate
10 upvotes
Page of 4
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