Meta Interview Questions — 100 DSA Problems

100 problems with full solutions in Python, Java, C++, JavaScript, Go, Rust.

Most frequently asked Meta LeetCode questions for software engineering interviews.

• Merge Sorted Array (EASY) — Array, Two Pointers, Sorting
• Pow(x, n) (MEDIUM) — Math, Recursion
• Simplify Path (MEDIUM) — String, Stack
• Merge Intervals (MEDIUM) — Array, Sorting
• Two Sum (EASY) — Array, Hash Table
• Next Permutation (MEDIUM) — Array, Two Pointers
• Merge k Sorted Lists (HARD) — Linked List, Divide and Conquer, Heap (Priority Queue), Merge Sort
• 3Sum (MEDIUM) — Array, Two Pointers, Sorting
• Find First and Last Position of Element in Sorted Array (MEDIUM) — Array, Binary Search
• Valid Parentheses (EASY) — String, Stack
• Valid Number (HARD) — String
• Minimum Window Substring (HARD) — Hash Table, String, Sliding Window
• Longest Common Prefix (EASY) — String, Trie
• Add Two Numbers (MEDIUM) — Linked List, Math, Recursion
• Letter Combinations of a Phone Number (MEDIUM) — Hash Table, String, Backtracking
• Subsets (MEDIUM) — Array, Backtracking, Bit Manipulation
• Remove Nth Node From End of List (MEDIUM) — Linked List, Two Pointers
• Longest Substring Without Repeating Characters (MEDIUM) — Hash Table, String, Sliding Window
• Trapping Rain Water (HARD) — Array, Two Pointers, Dynamic Programming, Stack, Monotonic Stack
• String to Integer (atoi) (MEDIUM) — String
• Longest Palindromic Substring (MEDIUM) — Two Pointers, String, Dynamic Programming
• Remove Duplicates from Sorted Array (EASY) — Array, Two Pointers
• Median of Two Sorted Arrays (HARD) — Array, Binary Search, Divide and Conquer
• Palindrome Number (EASY) — Math
• Search in Rotated Sorted Array (MEDIUM) — Array, Binary Search
• Roman to Integer (EASY) — Hash Table, Math, String
• Merge Two Sorted Lists (EASY) — Linked List, Recursion
• Group Anagrams (MEDIUM) — Array, Hash Table, String, Sorting
• Count and Say (MEDIUM) — String
• Climbing Stairs (EASY) — Math, Dynamic Programming, Memoization
• Maximum Subarray (MEDIUM) — Array, Divide and Conquer, Dynamic Programming
• Container With Most Water (MEDIUM) — Array, Two Pointers, Greedy
• Set Matrix Zeroes (MEDIUM) — Array, Hash Table, Matrix
• Sort Colors (MEDIUM) — Array, Two Pointers, Sorting
• Add Binary (EASY) — Math, String, Bit Manipulation, Simulation
• Multiply Strings (MEDIUM) — Math, String, Simulation
• Reverse Integer (MEDIUM) — Math
• Word Search (MEDIUM) — Array, String, Backtracking, Depth-First Search, Matrix
• Plus One (EASY) — Array, Math
• Generate Parentheses (MEDIUM) — String, Dynamic Programming, Backtracking
• Rotate Image (MEDIUM) — Array, Math, Matrix
• Spiral Matrix (MEDIUM) — Array, Matrix, Simulation
• Regular Expression Matching (HARD) — String, Dynamic Programming, Recursion
• Insert Interval (MEDIUM) — Array
• Find the Index of the First Occurrence in a String (EASY) — Two Pointers, String, String Matching
• Sqrt(x) (EASY) — Math, Binary Search
• Search a 2D Matrix (MEDIUM) — Array, Binary Search, Matrix
• Binary Tree Zigzag Level Order Traversal (MEDIUM) — Tree, Breadth-First Search, Binary Tree
• Divide Two Integers (MEDIUM) — Math, Bit Manipulation
• Largest Rectangle in Histogram (HARD) — Array, Stack, Monotonic Stack