Question 1

LRU Cache — Oracle Interview Question

Accepted Answer

"LRU Cache" is a medium difficulty problem asked at Oracle interviews. It covers the following topics: Hash Table, Linked List, Design, Doubly-Linked List. You can practice it on LeetCode: https://leetcode.com/problems/lru-cache

Question 2

Number of Islands — Oracle Interview Question

Accepted Answer

"Number of Islands" is a medium difficulty problem asked at Oracle interviews. It covers the following topics: Array, Depth-First Search, Breadth-First Search, Union Find, Matrix. You can practice it on LeetCode: https://leetcode.com/problems/number-of-islands

Question 3

Two Sum — Oracle Interview Question

Accepted Answer

"Two Sum" is a easy difficulty problem asked at Oracle interviews. It covers the following topics: Array, Hash Table. You can practice it on LeetCode: https://leetcode.com/problems/two-sum

Question 4

Longest Substring Without Repeating Characters — Oracle Interview Question

Accepted Answer

"Longest Substring Without Repeating Characters" is a medium difficulty problem asked at Oracle interviews. It covers the following topics: Hash Table, String, Sliding Window. You can practice it on LeetCode: https://leetcode.com/problems/longest-substring-without-repeating-characters

Question 5

Merge Intervals — Oracle Interview Question

Accepted Answer

"Merge Intervals" is a medium difficulty problem asked at Oracle interviews. It covers the following topics: Array, Sorting. You can practice it on LeetCode: https://leetcode.com/problems/merge-intervals

Question 6

Group Anagrams — Oracle Interview Question

Accepted Answer

"Group Anagrams" is a medium difficulty problem asked at Oracle interviews. It covers the following topics: Array, Hash Table, String, Sorting. You can practice it on LeetCode: https://leetcode.com/problems/group-anagrams

#	Question Title	Difficulty	Frequency	Topics
1	LRU Cache	MEDIUM	100.0	Hash TableLinked ListDesign+1
2	Number of Islands	MEDIUM	89.5	ArrayDepth-First SearchBreadth-First Search+2
3	Two Sum	EASY	88.3	ArrayHash Table
4	Longest Substring Without Repeating Characters	MEDIUM	85.8	Hash TableStringSliding Window
5	Merge Intervals	MEDIUM	85.1	ArraySorting
6	Group Anagrams	MEDIUM	82.2	ArrayHash TableString+1
7	Longest Palindromic Substring	MEDIUM	77.8	Two PointersStringDynamic Programming
8	Merge k Sorted Lists	HARD	72.5	Linked ListDivide and ConquerHeap (Priority Queue)+1
9	Sliding Window Maximum	HARD	71.2	ArrayQueueSliding Window+2
10	Container With Most Water	MEDIUM	71.2	ArrayTwo PointersGreedy

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