Applications of Hash Tables

Hash tables have various applications in software development and computer science. They provide efficient lookup, insertion, and deletion operations, making them suitable for solving problems where fast key-value pair access is needed. Let's explore some real-world applications of hash tables:

1. Caching: Hash tables are commonly used in caching systems to store frequently accessed data. By using a hash table, the system can quickly retrieve the cached data without needing to fetch it from the original source.

2. Database indexing: Hash tables are used in database indexing to achieve fast retrieval of data based on key values. Indexing allows for efficient search operations in large datasets, improving the overall performance of the database.

3. Symbol tables: Hash tables are used to implement symbol tables in compilers and interpreters. Symbol tables store identifiers (such as variable names) and their associated information, allowing for efficient lookup and manipulation of symbols during the compilation or interpretation process.

4. Spell checking: Hash tables can be used in spell-checking algorithms to store a dictionary of correctly spelled words. When checking the spelling of a word, the hash table can quickly determine whether the word is valid or not, improving the efficiency of the spell-checking process.

5. Deduplication: Hash tables are useful for removing duplicates from a collection of data. By inserting elements into a hash table and checking for duplicates using the hash function, duplicate elements can be easily identified and eliminated.

These are just a few examples of how hash tables are applied in real-world scenarios. The flexibility and efficiency of hash tables make them an essential data structure in many areas of software development and computer science.

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class Main {

    public static void main(String[] args) {

    // replace with your Java logic here

   for(int i = 1; i <= 100; i++) {

     if(i % 3 == 0 && i % 5 == 0) {

         System.out.println("FizzBuzz");

     } else if(i % 3 == 0) {

         System.out.println("Fizz");

     } else if(i % 5 == 0) {

         System.out.println("Buzz");

     } else {

         System.out.println(i);

     }

   }    

 }

}