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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.
AWS Java SDK 2 - S3 File upload & download
Carvia Tech | January 05, 2021 | 4 min read | 4,118 views | AWS Tutorials
In this tutorial, we will walk through new AWS SDK 2 for doing object level operations on S3 bucket. We will specifically cover PutObject, GetObject and GetUrl operation on S3 Objects using AWS SDK 2
Read ArticleSpring RestTemplate Basic Authentication
Carvia Tech | December 26, 2020 | 3 min read | 2,287 views
We will configure RestTemplate with basic authentication credentials in a Spring Boot application using RestTemplateBuilder.
Read ArticleGiven a collection of 1 million integers, all ranging between 1 to 9, sort them in Big O(n) time
Carvia Tech | November 22, 2020 | 2 min read | 669 views | Java Coding Challenges algorithm-datastructures
This is a typical Integer Sorting problem with a constraint that the number range to sort is very limited in spite 1 million total entries. Integer Sorting with limited range is achieved efficiently with Bucket Sorting.
Read ArticleGoldman Sachs Java Interview Questions
Carvia Tech | November 22, 2020 | 4 min read | 3,022 views | investment banking
Goldman Sachs Java Interview Questions on core java problems, coding challenges, data structures and algorithms, performance issues, design problems, and testing aspects.
Read Article50 microservices interview questions for Java developers
Carvia Tech | November 22, 2020 | 2 min read | 1,250 views | microservices-architecture
50 Spring Microservices interview questions for experienced Java Developers - core concepts, oauth2 security, testing microservices, deployment patterns, and best practices
Read ArticleDialoglfow fulfillment with Spring Boot
Carvia Tech | November 21, 2020 | 2 min read | 649 views
In this tutorial we will learn how to implement Google Dialogflow response fulfilment webhook API with a Spring Boot application.
Read ArticleRun method on Spring Boot startup
Carvia Tech | November 21, 2020 | 3 min read | 15,465 views | spring-boot
Spring Boot provides different mechanisms to run a specific method at Application Startup: PostConstruct, CommandLineRunner, ApplicationReadyEvent and ApplicationRunner
Read ArticleCRC32 checksum calculation Java NIO
Carvia Tech | November 21, 2020 | 1 min read | 100 views
Java FileChannel provide much better performance than the BufferedInputStream and RandomAccessFile classes.
Read ArticleConcurrentModificationException in Java
Carvia Tech | November 21, 2020 | 1 min read | 1,287 views | Multithreading and Concurrency
ConcurrentModificationException is raised by fail-fast iterators when the underlying collection is modified structurally during iteration.
Read ArticleRelative efficiency of Algorithms using Big O Notation
Carvia Tech | November 21, 2020 | 2 min read | 143 views
Big O Notation is a mechanism used to measure the relative inefficiencies of Algorithms in terms of space and time. In this article, we will discuss commonly used Big O Notations and their practical significance.
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