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Tech forum for Java, algorithms & data-structures, Hibernate, RESTful API, Spring framework, Microservices architecture, Interview questions, Python, SDET, Machine learning, DevOps.
Merge two sorted array into a single sorted array
Upasana | October 16, 2020 | | 42 views
There are two sorted array of integers, you have to merge them both into single sorted array.
Read ArticleN+1 problem in Hibernate & Spring Data JPA
Upasana | October 03, 2020 | 4 min read | 3,088 views
N+1 problem is a performance issue in Object Relational Mapping that fires multiple Select Queries in database for a single select query at application layer. Hibernate provides multiple ways to identify and prevent this problem.
Read ArticleWhat is purpose of Collections.unmodifiableCollection
Upasana | October 03, 2020 | 1 min read | 70 views | Multithreading and Concurrency
What does Collections.unmodifiableCollection() do? Is it safe to use the collection returned by this method in a multi-threading environment?
Read ArticleHttp methods for RESTful services
Upasana | October 01, 2020 | 6 min read | 3,619 views
Most commonly used HTTP methods are GET, POST, PUT, PATCH and DELETE. We will cover all of these one by one in detail.
Read ArticleCustom TTL for Spring data Redis Cache
Upasana | October 01, 2020 | 2 min read | 2,978 views
Spring Boot 2.2 provides options to customize Redis Cache using RedisCacheManagerBuilderCustomizer enabling us to set custom value for TTL (time-to-live) for each of the cache.
Read ArticleInstall & configure Redis on Ubuntu
Upasana | October 01, 2020 | 3 min read | 103 views
This tutorial demonstrates how to install, configure (memory, systemd, networking), and secure Redis 5.x on Ubuntu 20.04 LTS server.
Read ArticleMarkit Java Interview Questions
Upasana | October 01, 2020 | 2 min read | 215 views | investment banking
Most investment banking companies need skills like inheritance, multi-threading, concurrency, collections, java design patterns, spring framework, basic knowledge of database - indexes, joins and working knowledge of queue etc.
Read ArticleUpgrade Jenkins on Ubuntu 18.04 LTS
Upasana | September 30, 2020 | 1 min read | 7,924 views
we will apply minor update to existing Jenkins installation on Ubuntu 18.04 LTS and Ubuntu 20.04 LTS machine.
Read ArticleTop 50 Spring Interview Questions
Upasana | September 30, 2020 | 2 min read | 1 views
Top 50 interview questions from Spring MVC, Core, Dependency Injection, REST, Spring Security, Spring Boot
Read ArticleUnresolved circular dependency in spring dependency injection
Upasana | September 30, 2020 | 3 min read | 1,690 views
This is most likely a design level problem and should be resolved by modifying the object level design. This problem indicates that two different Classes share the common responsibility and your design is lacking the abstraction of responsibilities.
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