publicclassStringPrograms{publicstaticvoidmain(String[]args){Stringstr="123";System.out.println(reverse(str));}publicstaticStringreverse(Stringin){if(in==null)thrownewIllegalArgumentException("Null is not valid input");StringBuilderout=newStringBuilder();char[]chars=in.toCharArray();for(inti=chars....
This post comes directly from my 14+ years of Java programming and lots of interviewing experience. Java 16 has been released recently and I have updated the post to include some of the questions from the latest releases. Core Java Interview Questions and Answers I have already written a lot ...
57)What is JDK, JRE, and JVM? –JDK (Java Development Kit):It contains the tools for developing and compiling the Java programs. JRE (Java Runtime Environment):The runtime environment to run the Java applications. JVM (Java Virtual Machine): Runs Java bytecodeacross different platforms. 58...
The questions you were exposed to in this Java Interview Questions blog remain the most commonly asked questions by recruiters in the industry. We are certain that these sets of Java Interview Questions will be of great help to you if you are preparing for interviews. If you'd like to read...
ConcurrentHashMapclass is fully interoperable with Hashtable in programs that rely on its thread safety but not on its synchronization details. Read More:ConcurrentHashMap Interview Questions. 14. How Hashmap Works? This question is themost importantand is most likely to be asked at every job i...
Object-oriented programming or popularly known as OOPs is a programming model or approach where the programs are organized around objects rather than logic and functions. In other words, OOP mainly focuses on the objects that are required to be manipulated instead of logic. This approach is ideal...
java-interview-questionsFrequently asked Java Interview questionsTable of ContentsNo.Questions 1 What are the differences between JVM, JRE and JDK? 2 Why Java is platform-independent language 3 How does JVM works 4 What are the main features of Java 5 What is public static void main? 6 What...
Java Basic Interview Questions 1. Why is Java a platform independent language? Java language was developed in such a way that it does not depend on any hardware or software due to the fact that the compiler compiles the code and then converts it to platform-independent byte code which can...
Java Programs Java String Methods JSP Interview Questions Servlets Interview Questions Java Design Pattern Questions Java Multiple Choice Questions Q. What are the types of Exceptions? Explain the hierarchy of Java Exception classes? Exception is an error event that can happen during the execution of ...
Basic Java Interview Questions Q1. Explain JDK, JRE and JVM? JDK vs JRE vs JVM JDK JRE JVM It stands for Java Development Kit. It stands for Java Runtime Environment. It stands for Java Virtual Machine. It is the tool necessary to compile, document and package Java programs. JRE refers...