Java Concepts Interview Questions
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CORE JAVA Interview Questions You'll Most Likely Be Asked
Author: Vibrant Publishers
language: en
Publisher: Vibrant Publishers
Release Date: 2016-12-09
290 Core Java Interview Questions 77 HR Interview Questions Real life scenario based questions Strategies to respond to interview questions 2 Aptitude Tests Core Java Interview Questions You’ll Most Likely Be Asked is a perfect companion to stand ahead above the rest in today’s competitive job market. Rather than going through comprehensive, textbook-sized reference guides, this book includes only the information required immediately for job search to build an IT career. This book puts the interviewee in the driver’s seat and helps them steer their way to impress the interviewer. The following is included in this book: a) 290 CORE JAVA Interview Questions, Answers and proven strategies for getting hired as an IT professional b) Dozens of examples to respond to interview questions c) 77 HR Questions with Answers and proven strategies to give specific, impressive, answers that help nail the interviews d) 2 Aptitude Tests download available on https://www.vibrantpublishers.com
Java Interview Questions and Answers
Java interview questions often cover a broad range of topics, including core Java concepts, object-oriented programming principles, data structures, algorithms, Java APIs, and best practices. Here are some common Java interview questions along with sample answers: What is Java? Java is a high-level, object-oriented programming language developed by Sun Microsystems (now owned by Oracle). It is designed to be platform-independent, allowing developers to write code once and run it on any Java-enabled platform without recompilation. What are the main features of Java? Some of the main features of Java include: Platform independence: Java programs can run on any platform with a Java Virtual Machine (JVM). Object-oriented: Java supports object-oriented programming principles such as encapsulation, inheritance, and polymorphism. Robustness: Java provides strong memory management, exception handling, and type checking mechanisms to ensure robust and reliable code. Multi-threading: Java supports concurrent execution of multiple threads, allowing developers to write scalable and responsive applications. Portability: Java programs are portable across different platforms, making them suitable for developing cross-platform applications. What is the difference between JDK, JRE, and JVM? JDK (Java Development Kit) is a software development kit that includes tools for developing and compiling Java applications, such as the Java compiler (javac) and the Java runtime environment (JRE). JRE (Java Runtime Environment) is a runtime environment that provides the necessary libraries and components to run Java applications. It includes the JVM (Java Virtual Machine) and core Java libraries. JVM (Java Virtual Machine) is an abstract computing machine that provides an execution environment for Java bytecode. It interprets and executes Java bytecode instructions and manages memory, threads, and other runtime aspects of Java applications. What is the difference between abstract class and interface in Java? An abstract class is a class that cannot be instantiated and may contain abstract methods (methods without a body) as well as concrete methods. It can also contain instance variables and constructors. Subclasses of an abstract class must implement all abstract methods or be declared abstract themselves. An interface is a reference type in Java that defines a contract of methods that a class must implement. It can only contain constant variables and method signatures (without method bodies). A class can implement multiple interfaces but can only extend one abstract class. What is the difference between Array List and LinkedList in Java? Array List is implemented as a dynamic array, meaning that it stores elements in a contiguous memory location and supports random access to elements using an index. It is efficient for accessing elements by index but less efficient for inserting or removing elements from the middle of the list. LinkedList is implemented as a doubly linked list, meaning that it stores elements as nodes with references to both the previous and next nodes. It is efficient for inserting or removing elements from the middle of the list but less efficient for random access. These are just a few examples of Java interview questions. Depending on the role and level of the interview, questions may cover more advanced topics such as design patterns, concurrency, memory management, and performance optimization. It's important to thoroughly prepare for interviews by reviewing core Java concepts, practicing coding exercises, and gaining hands-on experience with Java programming.
Java Professional Interview Guide
Author: Mandar Maheshwar Jog
language: en
Publisher: BPB Publications
Release Date: 2021-08-24
An Ultimate Solution to Crack Java interview KEY FEATURES ● Start identifying responses for various interviews for Java architecture. ● Solutions to real Java scenarios and applications across the industry. ● Understand the various perspectives of Java concepts from the interviewer's point of view. DESCRIPTION Java Professional Interview Guide aims at helping engineers who want to work in Java. The book covers nearly every aspect of Java, right from the fundamentals of core Java to advanced features such as lambdas and functional programming. Each concept's topics begin with an overview, followed by a discussion of the interview questions. Additionally, the book discusses the frameworks, Hibernate and Spring. The questions included in each topic will undoubtedly help you feel more confident during the technical interview, which will increase your chances of being selected. You will gain an understanding of both the interviewer and the interviewee's psychology. This book will help you build a solid foundation of Java, the Java architecture, and how to answer questions about Java's internal operations. You will begin to experience interview questions that cover all of Java's major concepts, from object orientation to collections. You will be able to investigate how objects are constructed and what the fundamental properties of OOPs are. Additionally, you will learn how to handle exceptions and work with files and collections. We'll cover advanced topics like functional programming and design patterns in the final chapters. The section also covers questions on Java web application development. Finally, you will be able to learn how to answer questions using industry-standard frameworks like Spring and Hibernate. WHAT YOU WILL LEARN ● How to prepare before an actual technical interview? ● You will learn how to understand an interviewer's mindset. ● What kind of questions can be asked and how can they be answered? ● How to deal with cross-examination questions in an interview. ● How can the interviewer reframe the questions and how can you provide solutions? WHO THIS BOOK IS FOR This book is intended for both new and experienced candidates preparing for the Java Developer Interview. Although the book provides an overview of all Java and J2EE concepts, prior knowledge of basic Java is required. TABLE OF CONTENTS 1. The Preparation Beyond Technology 2. Architecture of Java 3. Object Orientation in Java 4. Handling Exception 5. File Handling 6. Concurrency 7. JDBC 8. Collections 9. Miscellaneous 10. Functional Programming 11. Design Patterns 12. Basics of Web 13. Spring and Spring Boot 14. Hibernate