Abstraction in Java with Bank ATM Example

In the previous post we learned what is polymorphism in Java. In this post, we are going to learn about another important concept of OOPs in Java which is Abstraction.

Abstraction in Java simply means hiding certain details from the user and showing only essential information to the user.

• Here is a real-life example of abstraction: Through the ATM machine, banks only show essential information to people, such as withdrawing money and checking account balances, by hiding the internal implementation or mechanism.
• Another real-life example of abstraction is 

Polymorphism in Java with Examples

In the previous post, we learned about what is encapsulation in Java with its examples. In this post, we will learn about polymorphism in Java and how it works. So, without wasting any time, let's get into the discussion.

The term "polymorphism" means having many forms. In simple terms, it refers to the ability of something to exist in different forms or have different behaviors. It allows us to perform a single action in different or multiple ways. 

Here is a real-life example of Polymorphism:

Encapsulation in Java with Examples

In the previous post, we learned what is inheritance in Java with its different types and their examples. In this tutorial, we are going to learn what is encapsulation in Java with its examples.

Encapsulation in Java means binding data and code together into a single unit.

In simple words, Encapsulation is like putting things inside a box and controlling who can access them. In Java, we use classes to create these boxes. Each box (class) has some data (variables) and actions (methods) that can be performed on that data.

Inheritance in Java with Examples

In this tutorial, we are going to learn about what is inheritance in Java with its different types and how to implement each type with coding examples. Learning inheritance in Java is crucial because it is a very important concept of object-oriented programming(OOP). Interviewers often ask interview questions on the inheritance concept in Java to test your knowledge and ability to apply inheritance to solve real-world problems to develop efficient systems.    

Top 15+ OOP's Interview Questions and Answers

In this post, we will learn which interview questions on OOPs (Object-Oriented Programming) are mostly asked in interviews. In OOPs, the questions are usually focused on OOPs concepts like inheritance, abstraction, encapsulation, and polymorphism. There are many questions in object-oriented programming because it is a very important concept and style of programming. That's why interviewers ask most questions on it.

SQL Interview Questions for Freshers

If you want to become a software developer, backend engineer, data analyst, or even work in the data science and AI field, having SQL knowledge is crucial. It is very important to understand databases and how to manage data using SQL, RDBMS, etc. Collecting and managing data is essential for every company, and no software, website, or company operates without collecting data. Data helps them understand their customers, make complex decisions, and improve their products and services.

In this tutorial, I will share some of the most commonly asked SQL interview questions for both freshers and experienced candidates. So, without wasting any time, let's dive in... 

Collections In Java Interview Questions and Answers

In Java interviews, collections are one of the most commonly asked topics by interviewers. There is no chance of giving an interview without facing questions on collections in Java. Collections play a crucial role in managing and organizing data efficiently. Understanding the concepts and usage of Java collections is a must for any Java developer. 

This article will explore some common interview questions related to Java collections and provide comprehensive answers to help you prepare for your next interview. After going through these collection interview questions, you will acquire a solid grounding in Java Collections.