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#Best Java Interview Guide

200 Java Interview Questions and Answers : http://udemy.com/java-interview-questions-and-answers

#Our Best Paid Courses

#Useful interview resources

Lambda Expressions and Streams : https://www.youtube.com/watch?v=7YBPb64h2l4
Java MultiThreading : https://www.youtube.com/watch?v=AfVbJDr-8ic
Java Interview Questions and Answers : https://www.youtube.com/watch?v=5aHZABb1Iwk
Java Collections Interview Questions and Answers : https://www.youtube.com/watch?v=3hgYHXDVh-o
Exception Handling : https://www.youtube.com/watch?v=wj3UmzeyrvE
JUnit : https://www.youtube.com/watch?v=o5k9NOR9lrI
Design Patterns : https://www.youtube.com/watch?v=f5Rzr5mVNbY
Eclipse : https://www.youtube.com/watch?v=s4ShbtOHMCA
Mockito : https://www.youtube.com/watch?v=d2KwvXQgQx4
Spring MVC : https://www.youtube.com/watch?v=BjNhGaZDr0Y
JSP Servlets : https://www.youtube.com/watch?v=Vvnliarkw48
Spring : https://www.youtube.com/watch?v=24rGqtxuLhc
OOPS : https://www.youtube.com/watch?v=yJ5RSEZS9oA
Maven : https://www.youtube.com/watch?v=0CFWeVgzsqY
https://github.com/in28minutes/Java-EE-Design-Patterns/blob/master/JavaEE%20Design%20Patterns%20and%20Architecture%20-%20Presentation%20v0.7.pdf

#Our Best Free Courses

Spring : http://udemy.com/spring-tutorial-for-beginners/

#OOPS Interview Questions

Code Examples : https://github.com/in28minutes/JavaObjectOrientedProgramming
OOPS : https://www.youtube.com/watch?v=yJ5RSEZS9oA

#Advanced Java

Topics
Servlets
JSP
Spring
Spring MVC
Maven
What is maven? What does it do? https://github.com/in28minutes/MavenIn28Minutes
Videos & Presentations
Full Video on Design Patterns : https://www.youtube.com/watch?v=f5Rzr5mVNbY
Basics of Web Application : https://github.com/in28minutes/RealWorldWebApplicationWithServletsAndJspIn28Minutes/blob/master/Java%20JEE%20Web%20Applicaiton%20In28Minutes.pdf
Java EE Design Patterns : https://github.com/in28minutes/Java-EE-Design-Patterns/blob/master/JavaEE%20Design%20Patterns%20and%20Architecture%20-%20Presentation%20v0.7.pdf
Java Design Patterns : https://github.com/in28minutes/Design-Patterns-For-Beginners/blob/master/DesignPatterns-Presentation.pdf
RECOMMENDED COURSE
Java EE Patterns : https://www.udemy.com/java-ee-design-patterns-architecture-and-frameworks/?couponCode=JEEPATTERNS-UTUBE-1

#Servlets

Reference
https://github.com/in28minutes/RealWorldWebApplicationWithServletsAndJspIn28Minutes/blob/master/Java%20JEE%20Web%20Applicaiton%20In28Minutes.pdf
Code : https://github.com/in28minutes/JavaWebApplicationStepByStep
60 Minute Video on JSP Servlets : https://www.youtube.com/watch?v=Vvnliarkw48
Questions
If there are 1000 requests to a Servlet, how many instances of Servlet are created?
What is the life-cycle of a servlet?
Difference between Get and Post Request Methods?
What is difference between GenericServlet and HttpServlet?
What is the purpose of RequestDispatcher Interface?
How do you forward to a jsp from the servlet?
What is Session?
What are Cookies?
What is filter?
What is war file?
What is the structure of a war file?
What are the servlet annotations introduced in Servlet 3.0?
What is different between web server and application server?
What is difference between ServletConfig and ServletContext?
What is maven? What does it do? https://github.com/in28minutes/MavenIn28Minutes
RECOMMENDED COURSES
Java EE Patterns : https://www.udemy.com/java-ee-design-patterns-architecture-and-frameworks/?couponCode=JEEPATTERNS-UTUBE-1
Spring MVC : https://www.udemy.com/spring-mvc-tutorial-for-beginners-step-by-step/?couponCode=SPRNGMVC-UTUBE-1
JSP Servlets : https://www.udemy.com/learn-java-servlets-and-jsp-web-application-in-25-steps/?couponCode=JSPSRVLT-UTUBE-1
Maven : https://www.udemy.com/learn-maven-java-dependency-management-in-20-steps/?couponCode=MAVEN-UTUBE-1

#JSPs

Reference
https://github.com/in28minutes/RealWorldWebApplicationWithServletsAndJspIn28Minutes/blob/master/Java%20JEE%20Web%20Applicaiton%20In28Minutes.pdf
Code : https://github.com/in28minutes/JavaWebApplicationStepByStep
60 Minute Video on JSP Servlets : https://www.youtube.com/watch?v=Vvnliarkw48
Questions
Why do we need JSPs?
Explain JSP Lifecycle?
What is difference in roles of jsp in model 1 and model 2 architectures?
What are different types of comments in JSP?
What is Scriptlet, Expression and Declaration in JSP?
What are JSP implicit objects?
What are the disadvantages of Scriptlets?
What is difference between include directive and jsp:include action?
What is JSP Expression Language?
What are JSP EL implicit objects?
What is JSTL?
What happens if an exception is thrown from a JSP?
JSP Best Practices
How can you avoid multiple submit problem?
RECOMMENDED COURSES
Spring MVC : https://www.udemy.com/spring-mvc-tutorial-for-beginners-step-by-step/?couponCode=SPRNGMVC-UTUBE-1
JSP Servlets : https://www.udemy.com/learn-java-servlets-and-jsp-web-application-in-25-steps/?couponCode=JSPSRVLT-UTUBE-1
Java EE Patterns : https://www.udemy.com/java-ee-design-patterns-architecture-and-frameworks/?couponCode=JEEPATTERNS-UTUBE-1
Maven : https://www.udemy.com/learn-maven-java-dependency-management-in-20-steps/?couponCode=MAVEN-UTUBE-1

#Design Patterns

Resources
Full Video on Design Patterns : https://www.youtube.com/watch?v=f5Rzr5mVNbY
Java EE Design Patterns : https://github.com/in28minutes/Java-EE-Design-Patterns/blob/master/JavaEE%20Design%20Patterns%20and%20Architecture%20-%20Presentation%20v0.7.pdf
Java Design Patterns : https://github.com/in28minutes/Design-Patterns-For-Beginners/blob/master/DesignPatterns-Presentation.pdf
What are important Java EE Design Patterns? https://github.com/in28minutes/Java-EE-Design-Patterns
Some Creational patterns Examples
Factory method
java.util.Calendar#getInstance() & java.nio.charset.Charset#forName()
Prototype
java.lang.Object#clone()
Singleton
java.lang.Runtime#getRuntime() & java.lang.System#getSecurityManager()
Some Structural patterns
Adapter
java.util.Arrays#asList() & javax.xml.bind.annotation.adapters.XmlAdapter#marshal() and #unmarshal()
Decorator
All subclasses of java.io.InputStream, OutputStream etc. & java.util.Collections : synchronizedXXX() and unmodifiableXXX() methods.
Flyweight
java.lang.Integer#valueOf(int) (also on other Wrapper classes)
Behavioral patterns
Chain of responsibility
javax.servlet.Filter#doFilter() & Exception Handling
Command
java.lang.Runnable
Iterator
All implementations of java.util.Iterator
Strategy (recognizeable by behavioral methods in an abstract/interface type which invokes a method in an implementation of a different abstract/interface type which has been passed-in as method argument into the strategy implementation)
java.util.Comparator#compare(), executed by among others Collections#sort().
Template method (recognizeable by behavioral methods which already have a "default" behaviour definied by an abstract type)
All non-abstract methods of java.util.AbstractList, java.util.AbstractSet and java.util.AbstractMap.
RECOMMENDED COURSES
Java EE Patterns : https://www.udemy.com/java-ee-design-patterns-architecture-and-frameworks/?couponCode=JEEPATTERNS-UTUBE-1
Maven : https://www.udemy.com/learn-maven-java-dependency-management-in-20-steps/?couponCode=MAVEN-UTUBE-1
Spring MVC : https://www.udemy.com/spring-mvc-tutorial-for-beginners-step-by-step/?couponCode=SPRNGMVC-UTUBE-1
JSP Servlets : https://www.udemy.com/learn-java-servlets-and-jsp-web-application-in-25-steps/?couponCode=JSPSRVLT-UTUBE-1

#JDBC

Resources
Video : https://www.youtube.com/watch?v=1WgsDP10iqw
Questions
When do you use JDBC?
Different types of JDBC Drivers
What is the use of JDBC API?
What are the steps in a simple query to database?
What is difference between JDBC Statement and PreparedStatement?
What is the difference between execute, executeQuery, executeUpdate?
What is a ResultSet?
What is the use of setFetchSize() and setMaxRows() methods in Statement?
What is JDBC Batch Processing?
What is Transaction Management?
What is JDBC Savepoint?
What is a DataSource?
What are the CLOB and BLOB datatypes in JDBC? Why do you use them?
What is DDL and DML?
What are JDBC Best Practices?
What are the other famous JDBC frameworks? How did they solve the typical problems with JDBC?
What is JPA? https://github.com/in28minutes/HibernateJPAStepByStep
What is Hibernate?
Hibernate interview Questions : https://www.youtube.com/watch?v=nb4kKVDc4cE
Introduction to Transaction Management : https://www.youtube.com/watch?v=HcjHJLEbtRs
RECOMMENDED COURSES
Java EE Patterns : https://www.udemy.com/java-ee-design-patterns-architecture-and-frameworks/?couponCode=JEEPATTERNS-UTUBE-1
Maven : https://www.udemy.com/learn-maven-java-dependency-management-in-20-steps/?couponCode=MAVEN-UTUBE-1
Spring MVC : https://www.udemy.com/spring-mvc-tutorial-for-beginners-step-by-step/?couponCode=SPRNGMVC-UTUBE-1
JSP Servlets : https://www.udemy.com/learn-java-servlets-and-jsp-web-application-in-25-steps/?couponCode=JSPSRVLT-UTUBE-1

#J2EE

Resources
Everything from https://github.com/in28minutes/Java-EE-Design-Patterns/blob/master/JavaEE%20Design%20Patterns%20and%20Architecture%20-%20Presentation%20v0.7.pdf
Questions
What is JEE?
What are tomcat, web sphere and web logic?
What is war?
What is ear?
What are containers? what are the different types of containers?
What is Java EE api? https://docs.oracle.com/javaee/7/api/
Java EE 7 contains 14 new and updated JSRs. Java specifications are available at http://www.jcp.org.
JSR 338: Java Persistence API 2.1
JSR 339: Java API for RESTful WebServices2.0
JSR 340: Java Servlet 3.1
JSR 341: Expression Language 3.0
JSR 342: Java Platform, Enterprise Edition 7
JSR 343: Java Message Service 2.0
JSR 344: JavaServer Faces 2.2
JSR 345: Enterprise JavaBeans 3.2
JSR 346: Contexts and Dependency Injection for JavaEE 1.1
JSR 349: Bean Validation 1.1
JSR 352: Batch Applications for the Java Platform 1.0
JSR 353: Java API for JSON Processing 1.0
What is JPA? https://github.com/in28minutes/HibernateJPAStepByStep
What are important Java EE Design Patterns? https://github.com/in28minutes/Java-EE-Design-Patterns
What is maven? What does it do? https://github.com/in28minutes/MavenIn28Minutes
Introduction to Transaction Management : https://www.youtube.com/watch?v=HcjHJLEbtRs
RECOMMENDED COURSES
Java EE Patterns : https://www.udemy.com/java-ee-design-patterns-architecture-and-frameworks/?couponCode=JEEPATTERNS-UTUBE-1
Maven : https://www.udemy.com/learn-maven-java-dependency-management-in-20-steps/?couponCode=MAVEN-UTUBE-1
Spring MVC : https://www.udemy.com/spring-mvc-tutorial-for-beginners-step-by-step/?couponCode=SPRNGMVC-UTUBE-1
JSP Servlets : https://www.udemy.com/learn-java-servlets-and-jsp-web-application-in-25-steps/?couponCode=JSPSRVLT-UTUBE-1

#Maven

Resources
https://github.com/in28minutes/MavenIn28Minutes
Maven : https://www.youtube.com/watch?v=0CFWeVgzsqY
Questions
What is Maven? What does maven do? https://github.com/in28minutes/MavenIn28Minutes#0-what-is-maven
What is the power of Maven? https://github.com/in28minutes/MavenIn28Minutes#what-is-the-power-of-maven
Maven Full Course : https://www.youtube.com/watch?v=0CFWeVgzsqY
What is Conventions over Configuration?
What is the difference between Ant and Maven?
What is the standard maven folder structure?
What is a Local Repository?
What is a transitive dependency?
What is a dependency exclusion?
What is dependencyManagement?
How do you add code quality checks to your maven lifecycle?
Why do we use Maven Plugins?
What is Maven Build Lifecycle?
What are the different types of artefacts that can be produced using a maven pom?
What is a profile?
What is a SNAPSHOT?
What are maven properties?
What is a maven archetype?
What are maven best practices?
What is a maven release?
RECOMMENDED COURSES
Java EE Patterns : https://www.udemy.com/java-ee-design-patterns-architecture-and-frameworks/?couponCode=JEEPATTERNS-UTUBE-1
Maven : https://www.udemy.com/learn-maven-java-dependency-management-in-20-steps/?couponCode=MAVEN-UTUBE-1
Spring MVC : https://www.udemy.com/spring-mvc-tutorial-for-beginners-step-by-step/?couponCode=SPRNGMVC-UTUBE-1
JSP Servlets : https://www.udemy.com/learn-java-servlets-and-jsp-web-application-in-25-steps/?couponCode=JSPSRVLT-UTUBE-1

#Eclipse

Resources
https://github.com/in28minutes/EclipseIn28Minutes
Eclipse : https://www.youtube.com/watch?v=s4ShbtOHMCA
Questions
What is an IDE?
What is an workspace?
What are views?
What are perspectives?
Integration with Maven Full Course : https://www.youtube.com/watch?v=0CFWeVgzsqY
RECOMMENDED COURSES
Java EE Patterns : https://www.udemy.com/java-ee-design-patterns-architecture-and-frameworks/?couponCode=JEEPATTERNS-UTUBE-1
Maven : https://www.udemy.com/learn-maven-java-dependency-management-in-20-steps/?couponCode=MAVEN-UTUBE-1
Spring MVC : https://www.udemy.com/spring-mvc-tutorial-for-beginners-step-by-step/?couponCode=SPRNGMVC-UTUBE-1
JSP Servlets : https://www.udemy.com/learn-java-servlets-and-jsp-web-application-in-25-steps/?couponCode=JSPSRVLT-UTUBE-1

#Jenkins

Resources
https://ci.jenkins-ci.org/job/Core/job/jenkins/job/master/ & https://builds.apache.org
http://jenkins-le-guide-complet.github.io/html/sect-first-steps-first-job.html
http://www.javainterview.in/p/continuous-integration-interview.html
Questions
What is Jenkins?
What is continuous integration?
How do you create a new project in Jenkins?
What are typical builds that you would create in Jenkins?
What is maven? What does it do? https://github.com/in28minutes/MavenIn28Minutes
Maven Full Course : https://www.youtube.com/watch?v=0CFWeVgzsqY
RECOMMENDED COURSES
Java EE Patterns : https://www.udemy.com/java-ee-design-patterns-architecture-and-frameworks/?couponCode=JEEPATTERNS-UTUBE-1
Maven : https://www.udemy.com/learn-maven-java-dependency-management-in-20-steps/?couponCode=MAVEN-UTUBE-1
Spring MVC : https://www.udemy.com/spring-mvc-tutorial-for-beginners-step-by-step/?couponCode=SPRNGMVC-UTUBE-1
JSP Servlets : https://www.udemy.com/learn-java-servlets-and-jsp-web-application-in-25-steps/?couponCode=JSPSRVLT-UTUBE-1

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