Category: Short Writeups

SOLID Design Principles Single Responsibility Pattern – class has a single responsibility like Class Sort won’t have functions to add or delete from the list. ex Microservices Open – Closed Principle – Open for extension and closed for modification. It tells you to write your code so that you will be able to add new…

Hadoop  The Apache Hadoop software library is a framework that allows for the distributed processing of large data sets across clusters of computers using simple programming models. Hadoop Common: The common utilities that support the other Hadoop modules. Hadoop Distributed File System (HDFS™): A distributed file system that provides high-throughput access to application data. Hadoop…

1.0  1995 – had to establish a new connection for every request and the connection would close after it. So if a webpage had 4 images so 5 requests need to be established including for 1 for the html page.This is TCP slow start. 1.1  1995 – Till 2015 – had introduced a keep alive…

Public Key is used to sign into something 1. Get certificate issued from CA Server asks for the public key CA. Servers send a new message which has their own public key, domain name to get a certificate from CA. This entire message is encrypted by using the public key of the CA. CA unlocks…