Top 50 Hibernate Interview Questions

Top 50 Hibernate Interview Questions Book
Top 50 Hibernate Interview Questions Book

Top 50 Hibernate Interview Questions book contains basic to architect level Hibernate interview questions that an interviewer asks. Each question is accompanied with an answer so that you can prepare for job interview in short time.

We have compiled this list of Hibernate questions after attending dozens of technical interviews in top-notch companies like- Google, Facebook, Ebay, Amazon etc.

Often, these Hibernate questions and concepts are used in our daily programming work. But these are most helpful when an Interviewer is trying to test your deep knowledge of Hibernate.

Sample Questions:

What is the difference between a Set and a Bag in Hibernate?
How can we monitor the performance of Hibernate in an application?
How can we check if an Object is in Persistent, Detached or Transient state in Hibernate?
What are the different ORM levels in Hibernate?
What are the different ways to configure a Hibernate application?
What is Query Cache in Hibernate?
How will you order the results returned by a Criteria in Hibernate?
How does Example criterion work in Hibernate?
How does Transaction management work in Hibernate?
How can we mark an entity/collection as immutable in Hibernate?
What are the different options to retrieve an object from database in Hibernate?
How can we auto-generate primary key in Hibernate?
What is an Object Relational Mapping (ORM)?
What is the purpose of Configuration Interface in Hibernate?
What is Object Relational Impedance Mismatch?
What are the main problems of Object Relational Impedance Mismatch?
What are the key characteristics of Hibernate?
Can you tell us about the core interfaces of Hibernate framework?
How will you map the columns of a DB table to the properties of a Java class in Hibernate?
Does Hibernate make it mandatory for a mapping file to have .hbm.xml extension?
What are the steps for creating a SessionFactory in Hibernate?
Why do we use POJO in Hibernate?
What is Hibernate Query Language (HQL)?
How will you call a stored procedure in Hibernate?
What is Criteria API in Hibernate?
Why do we use HibernateTemplate?
How can you see SQL code generated by Hibernate on console?
What are the different types of collections supported by Hibernate?
What is the difference between session.save() and session.saveOrUpdate() methods in Hibernate?
What are the advantages of Hibernate framework over JDBC?
How can we get statistics of a SessionFactory in Hibernate?
What is the Transient state of an object in Hibernate?
What is the Detached state of an object in Hibernate?
What is the use of Dirty Checking in Hibernate?
What is the purpose of Callback interface in Hibernate?
What are the different types of Association mappings supported by Hibernate?
What are the different types of Unidirectional Association mappings in Hibernate?
What is Unit of Work design pattern?

Microservices Interview Questions

Microservices Interview Questions Book
Microservices Interview Questions Book

Microservices is the latest trend in Technology world. It is the new architecture on which very few books have been written.
If you are aiming to get a job in companies with Microservices architecture like- Netflix, Amazon etc. then this book can help you prepare for the technical interview.
This books also covers Architect level information in Q&A format for easy grasp of the concept.
This book helps you in understanding the deep concepts behind Microservices in a Q&A format.

Get the answers to questions like:

What are the characteristics of a Good Microservice?
Is it a good idea for Microservices to share a common database?
What are the issues in using REST over HTTP for Microservices?
What is Reactive Extensions?
What is Semantic Versioning?
What is Continuous Integration?
What is Ubiquitous language?
What is Mike Cohn’s Test Pyramid?
How can we eradicate non-determinism in tests?
What is PACT?
What is a Consumer Driven Contract (CDC)?
What is Canary Releasing?
How can we separate Deployment from Release of Microservices?
How will you implement Service Discovery in Microservices architecture?
What is the difference between Orchestration and Choreography in Microservices architecture?

Top 200 Java Technical Interview Questions

Top 200 Java Technical Interview Questions Book
Top 200 Java Technical Interview Questions Book

Top 200 Java Technical Interview Questions book contains the Top 200 Java Technical interview questions that you can expect in a Java interview. Each question is accompanied with an answer because you want to save precious time to prepare for a job interview.

We have compiled this list of these questions based on the experience of dozens of technical interviews in top technology companies like- Google, Facebook, Oracle, Amazon etc.

Sample questions are:

Why constructors cannot be final, static, or abstract in Java?
Can we inherit a Constructor?
If there are no pointers in Java, then why do we get NullPointerException?
What is meant by covariant return type in Java?
Is it possible to achieve Runtime Polymorphism by data members in Java?
Does Java allow us to use private and protected modifiers for variables in interfaces?
Why a String object is considered immutable in java?
How will you create an immutable class in Java?
What is the difference between Serializable and Externalizable interface?
In Java, if we do not specify any value for local variables, then what will be the default value of the local variables?
What is the difference between JDK and JRE?
What is Java Virtual Machine (JVM)?
What are the different types of memory areas allocated by JVM?
What is JIT compiler?
How Java platform is different from other platforms?
Why people say that Java is ‘write once and run anywhere’ language?
How Multi-threading works in Java?
What are the advantages of Multithreading?
What are the disadvantages of Multithreading?
What is a Thread in Java?
What is a Thread’s priority and how it is used in scheduling?
What are the differences between Pre-emptive Scheduling Scheduler and Time Slicing Scheduler?
What is the purpose of join() method in Thread class?
What is the fundamental difference between wait() and sleep() methods?
Is it possible to call run() method instead of start() on a thread in Java?
What is a daemon thread in Java?
How can we make a regular thread Daemon thread in Java?
How will you make a user thread into daemon thread if it has already started?
Can we start a thread two times in Java?
What is a Shutdown hook in Java?
In what scenarios can we interrupt a thread?
What is synchronization in Java?
What is the purpose of Synchronized block in Java?
What is static synchronization?
In Java, is it possible to lock an object for exclusive use by a thread?
How notify() method is different from notifyAll() method?
What is a Deadlock situation?
How does ClassLoader work in Java?
Do you think ‘main’ used for main method is a keyword in Java?
Can we write main method as public void static instead of public static void?
What is Runtime Polymorphism?
Let say, we run a java class without passing any arguments. What will be the value of String array of arguments in Main method?
What is the difference between byte and char data types in Java?
What are the main principles of Object Oriented Programming?
What is the difference between Object Oriented Programming language and Object Based Programming language?
In Java what is the default value of an object reference defined as an instance variable in an Object?
Why do we need constructor in Java?
Why do we need default constructor in Java classes?
What is the value returned by Constructor in Java?
What is the purpose of ‘this’ keyword in java?
Explain the concept of Inheritance?

Top 100 Tricky Java Interview Questions

Top 100 Tricky Java Interview Questions Book
Top 100 Tricky Java Interview Questions Book

Top 100 Tricky Java Interview Questions book contains tricky and nasty Java interview questions that an interviewer asks in Java technology interview. It is a compilation of questions after attending dozens of Java interviews in top-notch companies like- Google, Facebook, Ebay, Amazon etc. You can save time by reading questions as well as answers from the book.

Read Top 100 Tricky Java Interview Questions book on Amazon.com

Sample questions are:

  • How can you determine if JVM is 32-bit or 64-bit from Java Program?
  • What is the right data type to represent Money (like Dollar/Pound) in Java?
  • Is ++ operation thread-safe in Java?
  • How can you mark an array volatile in Java?
  • Can you create an Immutable object that contains a mutable object?
  • In Java, can we store a double value in a long variable without explicit casting?
  • What will this return 5*0.1 == 0.5? true or false?
  • How can you do constructor chaining in Java?
  • How can we find the memory usage of JVM from Java code?
  • Explain the difference between fail-fast and fail-safe iterators?
  • Can you catch an exception thrown by another thread in Java?
  • Do you think Java Enums are more powerful than integer constants?
  • How can you check if a String is a number by using regular expression?

Read Top 100 Tricky Java Interview Questions book on Amazon.com

Top 50 SQL Tricky Interview Questions

Top 50 SQL Tricky Interview Questions
Top 50 SQL Tricky Interview Questions

This Top 50 SQL Tricky Interview Questions book contains tricky and nasty SQL interview questions that an interviewer asks. It is a compilation of advanced SQL interview questions after attending dozens of technical interviews in top-notch companies like- Oracle, Google, Ebay, Amazon etc.

Each question is accompanied with an answer because you want to save your time while preparing for an interview.

The difficulty rating on these Questions varies from a Junior level programmer to Architect level.

Sample Questions are:

How can we retrieve alternate records from a table in Oracle?
Given a list of student names and grade. Write a query to print a comma separated list of student names in a grade.
Write SQL Query to get Student Name and number of Students in same grade.
Write SQL query to delete duplicate rows in a table?
Write SQL query to get the second highest salary among all Employees?
Write SQL Query to get Employee Name, Manager ID and number of employees in the department?
Write SQL query to get the nth highest salary among all Employees.
Given an Employee table with Manager_ID as column, print First name, Manager ID and Level of employees in Organization Structure?
Why is the difference between NVL and NVL2 functions in SQL?
What is the difference between UNION and UNION ALL?
What are the reasons for de-normalizing the data?
What is a Pseudocolumn?
How can you find 10 employees with Odd number as Employee ID?
What is the difference between DELETE and TRUNCATE in SQL?
Which SQL feature can be used to view data in a table sequentially?
What are the differences between CASE and DECODE in SQL?
Write a SQL Query to get the Quarter from date.

Top 100 Spring Interview Questions & Answers

Top 100 Spring Interview Questions & Answers

This book contains basic to expert level Spring interview questions that an interviewer asks. Each question is accompanied with an answer so that you can prepare for job interview in short time.

We have compiled this list after attending dozens of technical interviews in top-notch companies like- Google, Facebook, Ebay, Amazon etc.

Often, these Spring questions and concepts are used in our daily programming work. But these are most helpful when an Interviewer is trying to test your deep knowledge of Spring.

Sample questions are:

What are the cases in which Autowiring may not work in Spring framework?
Given a choice between declarative and programmatic Transaction Management, which method will you choose?
Is it allowed to inject null or empty String values in Spring?
What are the different types of events provided by Spring framework?
What are the benefits provided by Spring Framework’s Transaction Management?
What is the difference between DispatcherServlet and ContextLoaderListener in Spring?
What is a Java-based Configuration in Spring?
What is the difference between Full @Configuration and ‘lite’ @Beans mode?
In Spring framework, what is Annotation-based container configuration?
How will you switch on Annotation based wiring in Spring?
What are the two ways to enable RequiredAnnotationBeanPostProcessor in Spring?
What is @Qualifier annotation in Spring?
How Spring framework makes JDBC coding easier for developers?
What are the benefits of using Spring DAO?
What are the different ways to use Hibernate in Spring?
What types of Object Relational Mapping (ORM) are supported by Spring?
How will you integrate Spring and Hibernate by using HibernateDaoSupport?
What are the different types of the Transaction Management supported by Spring framework?
What is Aspect Oriented Programming (AOP)
What is an Aspect in Spring?
In Spring AOP, what is the main difference between a Concern and a Cross cutting concern?
What is a Joinpoint in Spring AOP?
What is an Advice in Spring AOP?
What are the different types of Advice in Spring AOP?
What is a Pointcut in Spring AOP?
What is an Introduction in Spring AOP?
What is a Target object in Spring AOP?
What is a Proxy in Spring AOP?
What are the different types of AutoProxy creators in Spring?
What is Weaving in Spring AOP?
In Spring AOP, Weaving is done at compile time or run time?
What is XML Schema-based Aspect implementation?
What is Annotation-based aspect implementation in Spring AOP?
How does Spring MVC framework work?
What is DispatcherServlet?
Can we have more than one DispatcherServlet in Spring MVC?
What is WebApplicationContext in Spring MVC?
What is Controller in Spring MVC framework?
What is @Controller annotation in Spring MVC?
What is @RequestMapping annotation in Spring?
What are the main features of Spring MVC?
What is the difference between a Singleton and Prototype bean in Spring?
How will you decide which scope- Prototype or Singleton to use for a bean in Spring?
What is the difference between Setter and Constructor based Dependency Injection (DI) in Spring framework?
What are the drawbacks of Setter based Dependency Injection (DI) in Spring?
What are the differences between Dependency Injection (DI) and Factory Pattern?
In Spring framework, what is the difference between FileSystemResource and ClassPathResource?
Name some popular Spring framework annotations that you use in your project?
How can you upload a file in Spring MVC Application?

Top 100 GIT Interview Questions & Answers

top100_git_cover

Top 100 GIT Interview Questions & Answers book

GIT is a very popular version control tool in software community. Many fortune 500 organizations use GIT. This book contains basic to expert level GIT interview questions that an interviewer asks. Each question is accompanied with an answer so that you can prepare for job interview in short time.

We have compiled this list of GIT questions after attending dozens of technical interviews in top-notch companies like- Google, Facebook, Ebay, Amazon etc.

Some of the sample questions are:
How can we know if a branch is already merged into master in GIT?
What is the purpose of git stash drop?
What is the HEAD in GIT?
What is the most popular branching strategy in GIT?
What is SubGit?
What is the use of git instaweb?
What are git hooks?
What is GIT?
What is a repository in GIT?
What are the main benefits of GIT?
What are the disadvantages of GIT?
What are the main differences between GIT and SVN?
How will you start GIT for your project?
What is git clone in GIT?
How will you create a repository in GIT?
What are the different ways to start work in GIT?
GIT is written in which language?
What does ‘git pull’ command in GIT do internally?
What does ‘git push’ command in GIT do internally?
What is git stash?
What is the meaning of ‘stage’ in GIT?
What is the purpose of git config command?
How can we see the configuration settings of GIT installation?
How will you write a message with commit command in GIT?
What is stored inside a commit object in GIT?
How many heads can you create in a GIT repository?
Why do we create branches in GIT?
What are the different kinds of branches that can be created in GIT?
How will you create a new branch in GIT?
How will you add a new feature to the main branch?
What is a pull request in GIT?

 

Top 50 Maven Interview Questions & Answers

maven_cover

Top 50 Maven Interview Questions & Answers book contains basic to expert level Maven interview questions that an interviewer asks. Each question is accompanied with an answer so that you can prepare for job interview in short time. We have compiled this list after attending dozens of technical interviews in top-notch companies like- Google, Facebook, Ebay, Amazon etc.
Often, these Maven questions and concepts are used in our daily programming work. But these are most helpful when an Interviewer is trying to test your deep knowledge of Maven.

The difficulty rating on these Questions varies from a Fresher level software programmer to a Senior software programmer.

Once you go through them in the first pass, mark the questions that you could not answer by yourself. Then, in second pass go through only the difficult questions.

Sample questions:

What are the main features of Maven?
What areas of a Project can you manage by using Maven?
What are the main advantages of Maven?
Why do we say “Maven uses convention over configuration”?
What are the different types of profile in Maven? Where will you define these profiles?
What are the differences between Ant and Maven?
What is MOJO in Maven?
What is the difference between a Release version and SNAPSHOT version in Maven?
How will you verify if Maven is installed on Windows?