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An inner join query combines rows from two or more tables based on a related column between them.
Use the SELECT statement to specify the columns you want to retrieve
Use the FROM clause to specify the tables you want to join
Use the INNER JOIN keyword to perform an inner join based on a common column
I applied via Company Website and was interviewed before May 2022. There were 3 interview rounds.
Basic questions of aptitude and some coding questions.
OOPS concepts are the principles of Object-Oriented Programming that help in creating modular and reusable code.
Encapsulation: Binding data and methods together in a single unit.
Inheritance: Acquiring properties and behavior of a parent class by a child class.
Polymorphism: Ability of an object to take many forms.
Abstraction: Hiding implementation details and showing only functionality.
Examples: Class, Object, Inheritan
String is a sequence of characters.
In Java, String is a class that represents a sequence of characters.
Strings are immutable, meaning their values cannot be changed once created.
String literals are enclosed in double quotes, e.g. "Hello World".
Strings can be concatenated using the + operator, e.g. "Hello" + "World".
Strings have many built-in methods for manipulation, such as length(), substring(), and indexOf().
Palindrome is a word, phrase, number, or other sequence of characters that reads the same backward as forward.
Remove all non-alphanumeric characters from the string
Convert the string to lowercase
Reverse the string
Compare the reversed string with the original string
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I applied via Naukri.com and was interviewed before Jul 2020. There were 3 interview rounds.
I have used the Singleton design pattern in my Java projects.
Singleton pattern ensures that only one instance of a class is created and provides a global point of access to it.
It is useful when we want to limit the number of instances of a class to one.
Example: Creating a Logger class as a Singleton to ensure only one instance is used throughout the application.
I applied via Naukri.com and was interviewed before May 2021. There was 1 interview round.
I applied via Company Website
I applied via Campus Placement and was interviewed before Jul 2021. There were 2 interview rounds.
I applied via Campus Placement and was interviewed before Oct 2020. There was 1 interview round.
Encapsulation is the process of hiding implementation details and providing access to only necessary information.
Encapsulation helps in achieving data abstraction and information hiding.
It allows for better control over data and prevents unauthorized access.
In Java, encapsulation is achieved through the use of access modifiers such as private, public, and protected.
For example, a class may have private variables that c...
A string is a sequence of characters used to represent text in programming.
Strings are often used for storing and manipulating text data.
In Java, strings are represented by the String class.
Strings can be concatenated using the + operator.
Strings are immutable, meaning they cannot be changed once created.
Examples of string literals include "hello world" and "42".
I was interviewed in Jun 2017.
I applied via Naukri.com and was interviewed in Aug 2018. There were 5 interview rounds.
The question is asking about the candidate's knowledge in Core Java, Spring, Hibernate, Spring Boot, SQL, and AngularJS.
Core Java is the foundation of Java programming language.
Spring is a popular framework for building Java applications.
Hibernate is an ORM tool used for mapping Java objects to database tables.
Spring Boot is a framework for building microservices.
SQL is a language used for managing relational databases...
To connect 2 DBs from a Spring Boot application, configure multiple data sources and use JdbcTemplate or EntityManager for each DB.
Configure multiple data sources in the application.properties file
Create separate configuration classes for each data source
Use JdbcTemplate or EntityManager to interact with each DB
Specify the appropriate data source in the repository or service classes
Abstract method implementation is mandatory while default method is optional.
Abstract method has no implementation in the abstract class and must be implemented by the subclass.
Default method has a default implementation in the interface and can be overridden by the implementing class.
Abstract method is used to enforce a contract while default method is used to provide a default behavior.
Example: abstract method - publ...
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