First, you have to understand what is JVM, so I have published a post on what is JVM in simple terms, so before reading this post please refer to the linked post if you don't have a clear idea about JVM. How the JVM instance is created When you write…

First, let’s find out where JVM stands inside the architecture of Java. The JVM sits inside the Java Runtime Environment (JRE), among other library classes. The that whole component sits inside the Java Development Kit (JDK) together with development tools such as compiler (javac), archiver (jar), document generator (javadoc) etc. What is JVM? …

Beware of the F-word! 😈 Brief The difference between the three Java F-words is one of the interviewers’ favourite these days. In the previous post we covered the final keyword. 🚀 Today we’ll look into the finally keyword. Usage You’ll always find it in some relation to the try-catch structure when you…

Hello readers I am back with a java interview questions series. We will be covering the tricky Java Interview Questions asked in the interview. These questions are truly based on the interview experience of me and some of my colleagues. We will not be covering the simple questions here that…

We are back with the second release of tricky interview questions for a quick interview revision and preparation. You can go through Release 1 here. 11. What is the difference between these two? List<Integer> list = new ArrayList<>(10); List<Integer> list = new ArrayList<>(); 12. What are the different ways to…

Another day another release of tricky java interview questions. You can go through Release 3 here. and the whole list here. 31. What is the best candidate for the HashMap Key? Are Strings a good candidate for HashMap Key? Immutable objects are very good candidates for the HashMap Key, as they cannot be changed once created. As Strings are immutable in nature they are a very good candidate…

We are back with another release of tricky interview questions for a quick interview revision and preparation. You can go through Release 2 here. Hurray !!! in the further releases, we will also be covering answers to the questions. Readers be like :

Read Release 5 first or you can get the whole list here. 51. What is “out” in “System.out.println()”? The System is the final class that comes from java.lang package. out is an instance variable of PrintStream type, which is a public static member of the System class. println() is a method available in the System class…

Before reading these interview questions make sure you have gone through the earlier Release 4 or you can get the whole list here. 41. How can we make sure that thread t1,t2, and t3 will execute in the same sequence in java? We can achieve this by using the join() method of the there. We need to make sure that t3 calls t2.join() and t2 will call t1.join(). …

Collections in java — TreeSet: Keeps the elements sorted and prevents duplicates. HashMap : Lets you store and access elements as name/value pairs. LinkedList: Makes it easy to create structures like stacks or queues. HashSet : Prevents duplicates in the collection, and given an element, can find that element in the collection quickly. LinkedHashMap…