Design pattern in java
creational
structural
behavioural
s
Spring
container vs VM
docker
https://www.interviewbit.com/docker-interview-questions/
K8s
https://www.interviewbit.com/kubernetes-interview-questions/
Design Patterns
https://www.journaldev.com/1827/java-design-patterns-example-tutorial#strategy-pattern https://www.journaldev.com/1827/java-design-patterns-example-tutorial#template-methodpattern https://www.journaldev.com/1827/java-design-patterns-example-tutorial#builder-pattern https://www.journaldev.com/1827/java-design-patterns-example-tutorial#decorator-pattern https://www.geeksforgeeks.org/singleton-design-pattern/ https://www.geeksforgeeks.org/abstract-factory-pattern/ https://dzone.com/articles/factory-method-vs-abstract http://www.codespaghetti.com/java-design-pattern-interview-questions/
Code Smells
http://www.programmergirl.com/identifying-code-smells-java/
Code Coverage
https://www.atlassian.com/continuous-delivery/software-testing/code-coverage
Mocking
https://www.softwaretestinghelp.com/mockito-inteview-questions/ https://examples.javacodegeeks.com/core-java/powermockito/powermockito-tutorialbeginners/ https://www.youtube.com/watch?v=8S8o46avgAw
Unit & Integration Testing
https://www.toptal.com/java/unit-integration-junit-tests
SOLID
Ports and Adapters
https://www.thinktocode.com/2018/07/19/ports-and-adapters-architecture/ https://medium.com/@codespeaks/a-quick-and-practical-example-of-hexagonal-architecturein-java-7334e7f2ad43
Git
https://www.atlassian.com/git/tutorials/comparing-workflows/gitflow-workflow https://www.freecodecamp.org/news/an-introduction-to-git-merge-and-rebase-what-theyare-and-how-to-use-them-131b863785f/
Jenkins
https://www.youtube.com/watch?v=7KCS70sCoK0
Sonar
https://www.youtube.com/watch?v=BuT1Ji0P9Ug
Test Driven Development (TDD)
https://hackernoon.com/introduction-to-test-driven-development-tdd-61a13bc92d92 https://www.youtube.com/watch?v=y8TcPr73Bwo https://www.youtube.com/watch?v=s9vt6UJiHg4 http://aspiringcraftsman.com/2012/04/01/tdd-best-practices-dont-mock-others/ https://github.com/testdouble/contributing-tests/wiki/Don't-mock-what-you-don't-own
Behavior Driven Development (BDD) & JBehave
https://www.youtube.com/watch?v=VS6EEUVZGLE https://www.toptal.com/freelance/your-boss-won-t-appreciate-tdd-try-bdd https://www.youtube.com/watch?v=kNieSSoynW4 https://www.youtube.com/watch?v=eV7kBt89pWU https://www.youtube.com/watch?v=dmqkCS8sPL4
DDD
JWT
OAuth and its types
https://www.youtube.com/watch?v=996OiexHze0
OWASP
Spring Security
https://www.youtube.com/watch?v=X80nJ5T7YpE
https://www.youtube.com/watch?v=Dbxzw0cpxBU
Spring scopes
Exception Handling
https://stackify.com/best-practices-exceptions-java/ https://www.baeldung.com/exception-handling-for-rest-with-spring https://www.toptal.com/java/spring-boot-rest-api-error-handling
Spring Cloud
https://www.baeldung.com/intro-to-feign https://nirajsonawane.github.io/2019/03/21/Simplifying-Microservices-CommunicationUsing-Spring-Cloud-OpenFeign/ https://www.youtube.com/watch?v=aO3W-lYnw-o https://www.youtube.com/watch?v=x1BR0DbuQg&list=PLVz2XdJiJQxz3L2Onpxbel6r72IDdWrJh https://www.youtube.com/watch?v=rlS9eH5tEnY
Microservices
https://cloudacademy.com/blog/microservices-architecture-challenge-advantage-drawback/ https://microservices.io/patterns/refactoring/strangler-application.html https://microservices.io/patterns/data/saga.html https://microservices.io/patterns/microservice-chassis.html https://livebook.manning.com/book/microservices-patterns/chapter-2/25
SSL/TLS/Certificates
https://www.youtube.com/watch?v=T4Df5_cojAs
Pivotal Cloud Foundry (PCF)
https://www.youtube.com/watch?v=IMM58syURi4 https://www.youtube.com/watch?v=okOv450mO7U https://www.youtube.com/watch?v=Mo14JCWcotk
Big O notation
https://www.baeldung.com/java-algorithm-complexity
https://www.interviewcake.com/article/java/big-o-notation-time-and-space-complexity
Problem Solving (Problems on arrays, linked list, Strings etc.)
https://www.geeksforgeeks.org/subarraysubstring-vs-subsequence-and-programs-togenerate-them/ https://www.geeksforgeeks.org/sum-of-all-subsequences-of-an-array/ https://www.geeksforgeeks.org/write-a-program-to-reverse-an-array-or-string/ https://www.geeksforgeeks.org/minimum-halls-required-for-class-scheduling/?ref=leftbarrightbar https://www.geeksforgeeks.org/count-of-elements-on-the-left-which-are-divisible-by-currentelement/?ref=leftbar-rightbar https://www.geeksforgeeks.org/sum-even-odd-elements-array/ https://www.geeksforgeeks.org/maximum-number-of-unique-values-in-the-array-afterperforming-given-operations/?ref=leftbar-rightbar
Other Important Topics
https://howtodoinjava.com/interview-questions/spring-mvc-interview-questions-withanswers/ http://tutorials.jenkov.com/java-concurrency/java-memory-model.html http://tutorials.jenkov.com/java-concurrency/index.html http://tutorials.jenkov.com/java-concurrency/deadlock.html http://tutorials.jenkov.com/java-concurrency/deadlock-prevention.html https://www.baeldung.com/java-executor-service-tutorial
Performance Improvment in Microservices
Security in microservices architecture
C's Of Security: code, container, cluster, and cloud/co-lo/ corporate datacenter.
Coding
force push code from backend to frontend : https://stackoverflow.com/questions/34388614/how-to-force-update-single-page-application-spa-pages
How to spin frontend standalone as microservice
Loadbalancer vs API gateway
Use another server instead of tomcat in spring
how to use cache and types of cache: local n remote cache Eg
Implementation of rabbitMQ
customer object as key in hashmap? condition : make it immutable
two instance object acccesing synchronied method: both can run at sametime. make it static
java stream API performance comparison with normal for loop
Java API gateway
Frontend App Tuning
Query Performance tuning : https://mode.com/sql-tutorial/sql-performance-tuning/
Partitioning Postgresql for storing data : https://hevodata.com/learn/postgresql-partitions/
Multistage docker file for making hosting react app in docker image with nginx server
CloudFare as entry point . Its A DNS service
Virtualisation vs Containerisation:
https://middleware.io/blog/containerization-vs-virtualization/
Proxy vs Reverse proxy vs Loadbalancer
Ingress Vs loadbalancer: https://www.baeldung.com/ops/kubernetes-ingress-vs-load-balancer
Example of event sourcing:
Event Sourcing is a pattern for storing data as events in an append-only log. This simple definition misses the fact that by storing the events, you also keep the context of the events; you know an invoice was sent and for what reason from the same piece of information.
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