Interview

I have written a lot of java interview questions and this is index posts for all java interview questions. I will keep adding more interview questions to this post. Core Java Core java interview questions This list includes top 50 core java interview questions. Whether you are fresher or experienced programmer, this interview questions will […]

In this post, we will see how to print sequence using 3 threads in java.It is similar to printing odd-even numbers using two threads in java. Problem You are given 3 threads. You need to print sequence using these 3 threads.You need to print in natural order up to MAX. For example: Let’s say you […]

In this post, we will see 5 SOLID Principles in Java. Robert C. Martin gave five objected oriented design principles, and the acronym S.O.L.I.D is used for it. Each letter of this acronym talks about principles in Java. When you use all the principles of S.O.L.I.D in a combined manner, it becomes easier for you […]

In this post, we are going to see Java interview questions for 2 to 3 years experienced. These are the most asked interview questions for freshers(0-3 years experienced). This question list will help you to crack java interview. I have already shared detailed answer over here before, you might find it helpful as well. I […]

In this post, we will see Java interview questions for 5 to 6 years experience. When you have 5 years of experience as java developer, you need to have a good understanding of collections, multithreading concepts. If you are looking for the below queries then this post will help you as well. Java interview questions […]

Runnable and Callable interface both are used in the multithreading environment.Callable is available in java.util.concurrent.Callable package and Runnable in java.lang.Thread. Difference between Runnable and Callable interface in java Runnable was introduced in java 1.0 version While Callable is an extended version of Runnable and introduced in java 1.5 to address the limitation of Runnable. Runnable […]

In this post, we will see the difference between map and flatMap in java.I have already covered Stream’s map and flatMap methods  in previous articles. As you might know, Stream’s map and flatMap method both can be applied on Stream<T> and return Stream<R> as output. The actual difference is, map operation produces one output value […]

In this post, we will see about Parallel Stream in java. Java Parallel Stream introduction Java 8 introduces the concept of parallel stream to do parallel processing. As we have more number of cpu cores nowadays due to cheap hardware costs, parallel processing can be used to perform operation faster. Let’s understand with help of […]

In this post, we will see top Java technical interview asked in the Core Java interview.I have covered a lot of interview question on Java programming. Here is list of other java interview question you might find useful. Core java interview questions Java Collections interview questions Java String interview questions OOPs interview questions in java […]