Java and Spring Interview Guides

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

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

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

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

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

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

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

Jenkins

Resources
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

For Later

Git
Selenium
JavaScript
JQuery
JUnit

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Java interview guide - 200+ Question and Answers

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