Top Hash Table LeetCode Questions Asked in Google Interviews

Practice the most frequently asked Hash Table (Hashing) LeetCode questions in Google interviews. Learn key patterns like frequency counting, maps, and set-based problems.

#Interview Questions

Sl.No	Question	Difficulty	Frequency	LeetCode Link
1	Two Sum	EASY	100.00%	Solve
2	Online Election	MEDIUM	94.50%	Solve
3	Stock Price Fluctuation	MEDIUM	86.60%	Solve
4	Longest Substring Without Repeating Characters	MEDIUM	82.60%	Solve
5	LRU Cache	MEDIUM	79.20%	Solve
6	Group Anagrams	MEDIUM	78.90%	Solve
7	Letter Combinations of a Phone Number	MEDIUM	68.20%	Solve
8	Longest Consecutive Sequence	MEDIUM	66.20%	Solve
9	Roman to Integer	EASY	66.10%	Solve
10	Valid Sudoku	MEDIUM	61.10%	Solve
11	Word Break	MEDIUM	60.60%	Solve
12	First Missing Positive	HARD	59.10%	Solve
13	Set Matrix Zeroes	MEDIUM	58.70%	Solve
14	Minimum Window Substring	HARD	54.80%	Solve
15	Word Break II	HARD	53.30%	Solve
16	Integer to Roman	MEDIUM	52.20%	Solve
17	Rank Teams by Votes	MEDIUM	51.60%	Solve
18	Valid Anagram	EASY	51.40%	Solve
19	Detect Squares	MEDIUM	50.00%	Solve
20	Word Ladder	HARD	44.80%	Solve
21	Isomorphic Strings	EASY	43.10%	Solve
22	Sudoku Solver	HARD	42.70%	Solve
23	Missing Number	EASY	42.20%	Solve
24	Contains Duplicate II	EASY	42.20%	Solve
25	Copy List with Random Pointer	MEDIUM	39.20%	Solve
26	Clone Graph	MEDIUM	38.60%	Solve
27	Number of Islands II	HARD	38.60%	Solve
28	First Unique Character in a String	EASY	37.90%	Solve
29	Number of Substrings Containing All Three Characters	MEDIUM	37.90%	Solve
30	Binary Subarrays With Sum	MEDIUM	37.50%	Solve
31	Find Original Array From Doubled Array	MEDIUM	37.50%	Solve
32	Maximum Number of Ways to Partition an Array	HARD	37.50%	Solve
33	Rank Transform of an Array	EASY	37.50%	Solve
34	Find the Difference of Two Arrays	EASY	37.50%	Solve
35	Check If N and Its Double Exist	EASY	37.50%	Solve
36	Design a Number Container System	MEDIUM	37.50%	Solve
37	Sender With Largest Word Count	MEDIUM	37.50%	Solve
38	Tuple with Same Product	MEDIUM	37.50%	Solve
39	Unique Length-3 Palindromic Subsequences	MEDIUM	37.50%	Solve
40	Group Shifted Strings	MEDIUM	35.40%	Solve
41	Linked List Cycle	EASY	35.20%	Solve
42	Construct Binary Tree from Preorder and Inorder Traversal	MEDIUM	33.60%	Solve
43	Substring with Concatenation of All Words	HARD	32.60%	Solve
44	Fraction to Recurring Decimal	MEDIUM	30.60%	Solve
45	Strobogrammatic Number	EASY	25.10%	Solve
46	Longest Substring with At Most Two Distinct Characters	MEDIUM	25.10%	Solve
47	Array of Doubled Pairs	MEDIUM	25.00%	Solve
48	Minimum Operations to Reduce X to Zero	MEDIUM	25.00%	Solve
49	Alphabet Board Path	MEDIUM	25.00%	Solve
50	Minimum Operations to Make a Subsequence	HARD	25.00%	Solve

Top Hash Table LeetCode Questions Asked in Google Interviews

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