Java interview questions - Study guides, Class notes & Summaries

How to delete a character in a String ~ Because Strings in Java are immutable. You'll have to create a new string removing the character you don't want. String newstr = ring(0, idx) + ring(idx + 1); public String removeChar(String str, Integer n) { String front = ring(0, n); String back = ring(n+1, h()); return front + back; } What is Object Oriented Programming ~ Object-oriented programming (OOP) is a programming language model organized around objects rather than "actions" a...

What is the difference between an Interface and an Abstract class? ~ "An abstract class can have instance methods that implement a default behavior. An Interface can only declare constants and instance methods, but cannot implement default behavior and all methods are implicitly abstract. An interface has all public members and no implementation. An abstract class is a class which may have the usual flavors of class members (private, protected, etc.), but has some abstract methods." ...

Top 1000 Java Interview Questions Includes Spring, Hibernate, Microservices, GIT, Maven, JSP, AWS, Cloud Computing (latest edition)

Java Interview Review Questions and Answers (100% Pass)

Java Interview Questions with 100% Correct Answers

interview questions (java developer) | Questions & Answers (100 %Score) Latest Updated 2024/2025 Comprehensive Questions A+ Graded Answers | With Expert Solutions

Interview Questions (Java Developer); Questions and Answers 100% Pass What is a immutable class? Correct answer-A defined class where state of the object cannot be modified. What is the default sorting order in TreeMap? Correct answer-Natural Ordering What is the difference between wait() and sleep() Correct answer-wait is from the object class, used from synchronized object block until lock is acquired . Simply used for thread synchronization

INTERVIEW QUESTIONS (JAVA DEVELOPER)

Java Interview | Questions & Answers (100 %Score) Latest Updated 2024/2025 Comprehensive Questions A+ Graded Answers | With Expert Solutions

Java Interview; Questions and Answers 100% Pass How to delete a character in a String Correct answer-Because Strings in Java are immutable. You'll have to create a new string removing the character you don't want. String newstr = ring(0, idx) + ring(idx + 1); public String removeChar(String str, Integer n) { String front = ring(0, n); String back = ring(n+1, h()); return front + back