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Java Interview Programs

This repository contains comprehensive solutions to various Java interview problems, organized into several categories for clarity and ease of understanding.

Categories

1. String Algorithms

  • Program 1: String Reversal
    Description: This program reverses a given string.
    Complexity: O(n)
    Key Concepts: String manipulation, iteration.

  • Program 2: Anagram Check
    Description: This program checks if two strings are anagrams.
    Complexity: O(n log n)
    Key Concepts: Sorting, character counting.

...continue with all string related programs...

2. Array Algorithms

  • Program 1: Merge Sort
    Description: This program implements the Merge Sort algorithm.
    Complexity: O(n log n)
    Key Concepts: Divide and conquer, recursion.

  • Program 2: Finding Maximum Subarray
    Description: This program finds the maximum sum of a contiguous subarray.
    Complexity: O(n)
    Key Concepts: Kadane's Algorithm.

...continue with all array related programs...

3. Threading/Concurrency

  • Program 1: Producer-Consumer Problem
    Description: This program demonstrates the producer-consumer problem using thread synchronization.
    Complexity: O(n)
    Key Concepts: Inter-thread communication, blocking queues.

  • Program 2: Thread Pool Implementation
    Description: This program implements a thread pool for managing a large number of threads efficiently.
    Complexity: O(n)
    Key Concepts: Thread management, executor services.

...continue with all threading related programs...

4. Design Patterns

  • Program 1: Singleton Pattern
    Description: This program implements the Singleton design pattern to ensure a class has only one instance.
    Complexity: O(1)
    Key Concepts: Object-oriented design, instance management.

  • Program 2: Observer Pattern
    Description: This program demonstrates the Observer design pattern.
    Complexity: O(n)
    Key Concepts: Event handling, loose coupling.

...continue with all design pattern related programs...

Conclusion

These Java interview programs cover various important concepts and algorithms that can help in preparing for technical interviews. Each program includes a description and complexity analysis to provide deeper understanding.