Homework Help is Here – Start Your Trial Now!
Engineering
Computer Science
describe your understanding of hash tables in your own words. Give examples whenever possible.

describe your understanding of hash tables in your own words. Give examples whenever possible.

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
See similar textbooks
icon
Related questions
Question

JAVA

computer science

 

In your own words Please!

**Describe Your Understanding of Hash Tables in Your Own Words. Give Examples Whenever Possible.** Hash tables are a data structure that provides an efficient way of storing and retrieving data. They operate by using a hash function to transform keys into a unique index inside an array. This allows for quick data retrieval, as the index directly points to the data location. A simple example of a hash table is a dictionary where each word (key) is hashed to a unique index in an array, and at that index, the definition of the word (value) is stored. When you want to find the definition of a word, you hash the word to get the index and directly access the value at that index in the array. Here's a basic outline of how a hash table works: 1. **Hash Function:** Converts the key into an array index. 2. **Array/Bucket:** Stores the values at the respective indices. For instance, if you have a hash table storing student IDs (keys) and their corresponding grades (values), the student ID can be fed into the hash function to get an index where the grade is stored. Important points to consider include handling collisions (when two keys hash to the same index) which can be managed by methods like chaining or open addressing. Overall, hash tables are widely used due to their average-case constant time complexity for insertions, deletions, and lookups.
Transcribed Image Text:**Describe Your Understanding of Hash Tables in Your Own Words. Give Examples Whenever Possible.** Hash tables are a data structure that provides an efficient way of storing and retrieving data. They operate by using a hash function to transform keys into a unique index inside an array. This allows for quick data retrieval, as the index directly points to the data location. A simple example of a hash table is a dictionary where each word (key) is hashed to a unique index in an array, and at that index, the definition of the word (value) is stored. When you want to find the definition of a word, you hash the word to get the index and directly access the value at that index in the array. Here's a basic outline of how a hash table works: 1. **Hash Function:** Converts the key into an array index. 2. **Array/Bucket:** Stores the values at the respective indices. For instance, if you have a hash table storing student IDs (keys) and their corresponding grades (values), the student ID can be fed into the hash function to get an index where the grade is stored. Important points to consider include handling collisions (when two keys hash to the same index) which can be managed by methods like chaining or open addressing. Overall, hash tables are widely used due to their average-case constant time complexity for insertions, deletions, and lookups.
Expert Solution
steps

Step by step

Solved in 2 steps with 2 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Fundamentals of Blockchaining
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Database System Concepts
Database System Concepts
Computer Science
ISBN:
9780078022159
Author:
Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:
McGraw-Hill Education
Starting Out with Python (4th Edition)
Starting Out with Python (4th Edition)
Computer Science
ISBN:
9780134444321
Author:
Tony Gaddis
Publisher:
PEARSON
Digital Fundamentals (11th Edition)
Digital Fundamentals (11th Edition)
Computer Science
ISBN:
9780132737968
Author:
Thomas L. Floyd
Publisher:
PEARSON
C How to Program (8th Edition)
C How to Program (8th Edition)
Computer Science
ISBN:
9780133976892
Author:
Paul J. Deitel, Harvey Deitel
Publisher:
PEARSON
Database Systems: Design, Implementation, & Manag…
Database Systems: Design, Implementation, & Manag…
Computer Science
ISBN:
9781337627900
Author:
Carlos Coronel, Steven Morris
Publisher:
Cengage Learning
Programmable Logic Controllers
Programmable Logic Controllers
Computer Science
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education
SEE MORE TEXTBOOKS