Q1. HTTP is a stateless protocol, so how do you maintain state? How do you store user data between requests? A1. This is a commonly asked interview question. The “http protocol is a stateless request/response based protocol”. You can retain the state information between different page requests as follows: HTTP...
15 Spring boot interview questions & answers with tutorials for easy setup of new Spring applications. Spring boot helps you get started quickly with its auto-configuration ability, and Spring Cloud Microservices interview questions & answers extends Spring Boot with cloud & … Read more ›...
Multithreading is one of the important features of Java, and multithreading interview Q&As can reveal a lot about your depth of core Java knowledge. Most importantly, it is not easy to grasp multithreading concepts without lots of hands-on experience. Let’s start with the beginner basics & then get into Java concurrency management interview Q&As for the experienced.
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Java 8 Functional Programming Interview questions focusing on FP. Getting a good handle on Java OOP concepts and FP concepts are very important NOT only from writing quality code perspective, but also from job interviews perspective to be able to do well in written tests & technical interviews. … Read...
As an enterprise Java developer, you will be spending more time integrating systems via Java web services & messaging. Java Web Services interview questions are must know for the Java developers. Q1. What are the different styles of Web Services used for application integration? … Read more ›...
Here are 7 rules to remember regarding Java Generics to understand Generics and handle interview and coding questions on Core Java. Object <– Fruit <– (Orange, Mango, etc siblings) Rule 1: Java generics differ from C++ templates. Java generics (at least until JDK 8), … Read more ›...
The java.util.function package provides the below functional interfaces. These are used in lambda functions & saves you time by you not having to create your own. You will often find one of these below serve your requirement. Why Function, Supplier, Consumer & Predicate? We know that Java 8 introduced an...
Q1. How would you go about choosing the right data types for your application?
A1. Java is what is known as a strongly typed language. This means Java only accepts specific values within specific variables or parameters. Some languages, such as JavaScript, PHP,
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Java does not have a sizeof operator like C++ does. Java uses automatic memory management known as the Garbage Collection, hence it is not that important to evaluate size of various objects. But, for the purpose of learning & fixing any potential memory issues, I have used “jvisualvm”, … Read...
A Trade goes through 3 state changes – placed, filled, and settled. Let’s solve this simple problem using both OOP & FP approaches.
Place –> Fill –> Settle
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package com.shared; public class Trade { private final String name; private final int qty; public Trade(String name, int qty) { this.name = name; this.qty = qty; } public String getName() { return name; } public int getQty() { return qty; } @Override public String toString() { return "Trade [name=" + name + ", qty=" + qty + "]"; } } |
OOP approach by mutating the state
State changes are maintained via a variable named “
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60+ microservices interview questions & answers covering Spring boot, Spring cloud, and microservices design patterns. If you are an enterprise Java developer, then most likely you will be developing Microservices using Spring boot. Let’s start with the beginner microservices interview questions & then get to much needed 20+ microservices design...
Java Collection interview questions and answers and Java String class interview questions and answers are must know for any Java developer as these two APIs are the most frequently used in your Java application code. You can’t write any decent Java application without these 2 APIs. Q1. … Read more...
Java interview questions & answers on multithreading scenarios to judge your experience in building applications with concurrency in mind. Q1. Can you give some scenarios where you built concurrent systems? A1. In a concurrent system different threads run concurrently, … Read more ›...
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