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Top 20 Microservices Interview Questions and Answers using Spring Boot for Experienced Java Developers

Microservices architecture has gained tremendous popularity in recent years due to its flexibility and scalability. As an experienced Java developer, you might be preparing for a job interview focused on microservices development with Spring Boot. To help you excel in your interview, we've compiled a list of the top 20 microservices interview questions and provided answers along with sample code and the libraries used where applicable. 1. What are microservices, and how do they differ from monolithic architecture? Answer : Microservices are a design pattern where an application is divided into smaller, independent services that can be developed, deployed, and scaled individually. Unlike monolithic architecture, microservices are loosely coupled, making it easier to manage and scale individual components. 2. What is Spring Boot, and how does it simplify microservices development? Answer : Spring Boot is a framework that simplifies the development of production-ready microservices in...
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Using Java 8 Streams to Find the Second-Highest Salary in an Employee List

To find the second-highest salary from a list of employees using Java 8 streams, you can follow these steps: Create a list of employees with their salaries. Use Java 8 streams to sort the employees by salary in descending order. Skip the first element (which is the employee with the highest salary). Get the first element of the remaining stream (which is the employee with the second-highest salary). Example code: java import java.util.ArrayList; import java.util.List; class Employee { private String name; private double salary; public Employee (String name, double salary) { this .name = name; this .salary = salary; } public double getSalary () { return salary; } } public class SecondHighestSalary { public static void main (String[] args) { List<Employee> employees = new ArrayList <>(); employees.add( new Employee ( "John" , 60000.0 )); employees.add( new Employe...
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Top 20 Exception Handling Interview Questions and Answers for Experienced Java Developers

Introduction: Exception handling is a crucial aspect of Java development, ensuring robust and error-tolerant code. Experienced Java developers are expected to have a deep understanding of exception handling mechanisms. In this blog post, we'll explore the top 20 interview questions related to exception handling, accompanied by detailed answers and sample code snippets to help you prepare for your next Java interview. 1. What is an exception in Java? An exception is an event that disrupts the normal flow of a program. In Java, exceptions are objects that represent errors or abnormal situations during runtime. java try { // Code that may throw an exception } catch (ExceptionType e) { // Code to handle the exception } 2. Differentiate between checked and unchecked exceptions. Checked exceptions are checked at compile-time, and the programmer is forced to either catch them or declare that the method throws them. Unchecked exceptions, on the other hand, are not checked at ...
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A Deeper Look into the Java 8 Date and Time API with Q&A

  Understanding Java 8 Date and Time API: The Date and Time API introduced in Java 8 is part of the java.time package, providing classes to represent dates, times, durations, and intervals. This new API addresses many issues found in the old java.util.Date and java.util.Calendar classes, such as immutability, thread safety, and improved functionality. Benefits of Java 8 Date and Time API: Immutability : Date and time objects in the java.time package are immutable, making them thread-safe and eliminating issues related to mutability. Clarity and Readability : The API introduces clear and intuitive classes like LocalDate , LocalTime , and LocalDateTime , making code more readable and maintainable. Extensibility : It offers extensibility through the Temporal and TemporalAccessor interfaces, allowing developers to create custom date and time types. Comprehensive Functionality : The API provides comprehensive functionality for date and time manipulation, formatting, parsing, and a...
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