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 the essential operations and patterns for working with arrays effectively.

📄️ Sliding Window

The sliding window technique efficiently processes contiguous subarrays or substrings, often reducing time complexity from O(n²) to O(n).

📄️ String Manipulation

Master essential string processing techniques and patterns that appear frequently in coding interviews.

📄️ Two Pointers

The two pointers technique is a powerful approach for solving array and string problems efficiently, often reducing time complexity from O(n²) to O(n).