Arrays & Strings

Arrays and strings are the most fundamental data structures in programming. This section covers essential techniques and patterns that appear in countless algorithmic problems, making them perfect starting points for interview preparation.

Learning Map

Key concepts and techniques for working with arrays and strings.

Prerequisites

• Time & Space Complexity Analysis
• Basic Data Structures
• Basic Programming Concepts

What's in scope

• Array Fundamentals: Traversal, manipulation, rotation, and subarray problems
• Two Pointers: Efficient techniques for array and string problems
• Sliding Window: Processing contiguous subarrays and substrings
• String Manipulation: Parsing, anagrams, matching, and transformation

How to use this section

• Start with Array Fundamentals to understand basic array operations
• Learn Two Pointers for efficient array traversal techniques
• Master Sliding Window for subarray and substring problems
• Practice String Manipulation for text processing challenges

📄️ Array Fundamentals

Master essential array operations including traversal, manipulation, rotation, reversal, and subarray problems critical for efficient algorithms.

📄️ Two Pointers Technique

Master the two pointers approach for efficiently solving array and string problems by reducing time complexity from O(n²) to O(n).

📄️ Sliding Window

Master sliding window technique to efficiently process contiguous subarrays and substrings, reducing time complexity from O(n²) to O(n).

📄️ String Manipulation

Master string processing techniques including parsing, validation, anagrams, pattern matching, and transformations essential for problem-solving.