Required scenario — when I am trying to get large amount data from db (postgresql) but we are getting API gateways time out issue , so we need to follow How to implement Async communication in spring boot step 1- use @EnableAsync in class level annotation over service class @EnableAsync public class…

Agile or Agile Methodology or Agile Process for developer prospective — What do you mean by Agile or Agile Methodology or Agile Process? it is a set of rule where software development and management is eassy .by using agile we can deliver high end customer centric software in sort time. in a short development cycle known as sprints It is an iterative approach and each iteration is specially designed to be small and manageable. it…

1 -Consumer interface — A Consumer is an in-build functional interface in the java.util.function package. …

I have a list and that is student type and student contain (id,name, department,gender) on basis of department how to get employee gender count Like o/p HR male 20 female 30 Development male 20 female 60 {Product Development={Female=1, Male=4}, Security And Transport={Male=2}, Sales And Marketing={Female=1, Male=2}, Infrastructure={Female=1, Male=2}, HR={Female=2}, Account And Finance={Female=1, Male=1}}

Problem statement — I have user list need to short on basis of name and age User user1 = new User(1, "sanjay", "10"); User user2 = new User(2, "xanjay", "50"); User user3 = new User(3, "banjay", "20"); User user4 = new User(4, "aanjayz", "90"); User…

Tips to Optimize Java Code Performance Avoid Writing Long Methods If methods are large with too much processing they will consume memory as well as CPU cycles to execute. Try to break the methods into smaller ones at suitable logical points 2. Avoid Multiple If-else Statements If we are using too many conditional if-else statements it will impact performance…

Question — Given an integer array nums, find the subarray with the largest sum, and return its sum. Example 1: Input: nums = [-2,1,-3,4,-1,2,1,-5,4] Output: 6 Explanation: The subarray [4,-1,2,1] has the largest sum 6. Example 2: Input: nums = [1] Output: 1 Explanation: The subarray [1] has the largest sum 1. Example 3: Solution — 1- we can use brute force algorithm with 3 loop -> o(n3) 2- we can use brute force algorithm with 2 loop -> o(n2)

Processing large amounts of data in a Spring Boot application requires careful planning and optimization to ensure efficient and scalable data processing. Here are some steps and best practices to handle large data sets in a Spring Boot application: 1. Use Pagination: 1. Instead of loading all data at once, implement pagination to…

find the second highest salary, we nest the above query into another query as written below. SELECT MAX(SALARY) FROM Employee WHERE SALARY < (SELECT MAX(SALARY) FROM Employee); Second Highest Salary in MySQL without LIMIT SELECT MAX(salary) FROM Employee WHERE Salary NOT IN ( SELECT Max(Salary) FROM Employee); SELECT MAX(Salary) From Employee WHERE Salary < ( SELECT Max(Salary) FROM Employee); Second Highest Salary using Correlated SubQuery SELECT Id, Salary FROM Employee e WHERE 2=(SELECT COUNT(DISTINCT Salary) FROM Employee p WHERE e.Salary<=p.Salary Second Maximum Salary in MySQL using LIMIT SELECT Salary FROM (SELECT Salary FROM Employee ORDER BY salary DESC LIMIT 2) AS Emp ORDER BY salary LIMIT 1; N Maximum Salary in MySQL using LIMIT SELECT Salary FROM (SELECT Salary FROM Employee ORDER BY salary DESC LIMIT 2) AS Emp ORDER BY salary LIMIT 1;