Updated on October 18, 2021 by Arpit Mandliya Table of Contents [hide] Question 1: What is Exception ? Question 2: How can you handle exception in java? Question 4: Difference between checked exception, unchecked exceptionand and errors Question 5: Can we have try without catch block in ...
Stringis a class in Java and is defined in thejava.langpackage. It’s not a primitive data type likeintandlong. TheStringclass represents character strings.Stringis used in almost all Java applications.Stringin immutable and final in Java and the JVM uses a string pool to store all theStri...
Thread leak is when an application does not release references to a thread object properly. Due to this, some Threads do not get garbage collected and the number of unused threads grows with time. Thread leak can often cause serious issues on a Java application since over a period of time ...
Java 1.5 came with Generics and all collection interfaces and implementations use it heavily. Generics allow us to provide the type of Object that a collection can contain, so if you try to add any element of other type it throws compile time error. This avoids ClassCastException at Runtime ...
Please refer earlier question for these rules. - If a class field is not used in equals(), you should not use it in hashCode() method. - Best practice for user defined key class is to make it immutable, so that hashCode() value can be cached for fast performance. Also immutable ...
java programming interview questions java interview questions and answers for 3 years experience java interview questions for experienced professionals java interview questions for 5 years experience Let’s get started… Interview Question 1: What are the main 3 Object Oriented Programing (OOP) c...
Learn Java programming like a pro with the help of our simplified tutorials, examples and frequently asked Java interview questions and answers.
20. What will happen if you call return statement or System.exit on try or catch block ? will finally block execute? This is a verypopular tricky Java questionand its tricky because many programmer think that finally block always executed. This question challenge that concept by putting return...
This article features a great number of Spring interview questions and answers for experienced as well as beginner java developers!
Here are 10 of the most common and important Java garbage collection interview questions that any technicalDevOps engineer or developerapplicant must be ready to answer. 1. Why is garbage collection necessary in Java? In many programming languages, such asC and C++,when an object is no longer ...