AWS Account Setup and Cloud Computing Models: IaaS, PaaS, CaaS, FaaS and SaaS Cloud computing has completely changed the way applications are built, deployed, and managed. Instead of purchasing physical…
Authentication and Authorization for Backend Engineers Authentication and authorization are two of the most fundamental concepts in backend engineering. Almost every modern application needs to answer two questions: Who…
Serialization and Deserialization: A Practical Guide for Backend Engineers When building backend systems, we constantly move data between different applications, services, and machines. A browser sends data to a backend…
When a client such as a web application, mobile app, or another service sends a request to a backend server, the server needs to understand what the client wants to…
Understanding HTTP for backend engineers, where it all starts * ### 1. Core Principles of HTTP HTTP (Hypertext Transfer Protocol) is an application-layer protocol (Layer 7 in the OSI…
Spring Boot @Async — Complete Deep Explanation 1. First understand what @Async actually does Normally, Java executes method calls synchronously. public void process() { method1(); method2(); method3(); } Execution…
Yes 😄. Let's make @Transactional so simple that even a dog could understand it. Think of a transaction like a dog carrying two biscuits. 🐕🍪🍪 🐕 First understand: What…
package Javapractice; import java.util.stream.Stream; public class practice { public static void main(String[] args) { // TODO Auto-generated method stub //write a java8 program from a employee class with name and…
public class practice { public static void main(String[] args) { // TODO Auto-generated method stub //write a program to find the duplicate elements in an array and print the duplicate…
public class practice { public static void main(String[] args) { // TODO Auto-generated method stub String s="nima"; //reverse string String rev=""; for(int i=s.length()-1;i>=0;i--) { rev=rev+s.charAt(i); } } }
