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Infosys Java Spring Boot Developer Interview Questions and Answers
8 Interview questions
Java 8 provides a concise way to reverse a string using streams and collectors.
Use the StringBuilder class: StringBuilder sb = new StringBuilder(originalString); sb.reverse();
Utilize Java 8 Streams: String reversed = originalString.chars().mapToObj(c -> (char) c).reduce("", (s, c) -> c + s);
Another approach is to convert the string to a char array, reverse it, and create a new string: char[] charArray = orig...
Retrieve data from a database using REST API in Spring Boot involves creating a controller, service, and repository.
1. Create a Spring Boot application with necessary dependencies (Spring Web, Spring Data JPA, etc.).
2. Define an entity class that maps to the database table.
Example: @Entity public class User { @Id private Long id; private String name; }
3. Create a repository interface extending JpaRepository for...
Stateless API does not store client state on the server, while stateful API does.
Stateless API: Each request from client to server must contain all necessary information for the server to fulfill the request. No client state is stored on the server. Example: RESTful APIs.
Stateful API: The server stores client state, which can be accessed by subsequent requests. Example: HTTP sessions.
Spring is a framework for building Java applications, while Spring Boot is a tool for easily creating stand-alone, production-grade Spring-based applications.
Spring is a framework that provides comprehensive infrastructure support for developing Java applications.
Spring Boot is a tool that simplifies the process of creating and deploying Spring-based applications.
Spring Boot includes embedded servers, which makes ...
Rest controllers are specifically used for RESTful web services, while normal controllers are used for traditional web applications.
Rest controllers are used to build RESTful web services that can accept and return JSON or XML data.
Normal controllers are used for traditional web applications that render HTML views.
Rest controllers use annotations like @RestController and @RequestMapping to define endpoints.
Normal ...
Memory leak is a situation where a program uses memory inefficiently, causing memory to be allocated but not released.
Memory leak occurs when a program allocates memory but does not release it after it is no longer needed.
Identifying memory leaks can be done using tools like profilers to analyze memory usage over time.
Common signs of memory leaks include increasing memory usage over time, frequent garbage collecti...
The question covers topics like method overriding, method overloading, exceptions, Java 8 features, and string manipulation.
Method overriding is when a subclass provides a specific implementation of a method that is already provided by its superclass.
Method overloading is when multiple methods have the same name but different parameters.
Exception handling is used to handle errors that occur during the execution of...
A singleton class is a class that allows only one instance of itself to be created and provides a global point of access to that instance.
Singleton classes are often used in Spring Boot for managing resources such as database connections or thread pools.
In Spring Boot, singleton beans are created by default, meaning that only one instance of a bean is created and shared across the application.
To create a singleton...
Infosys Java Spring Boot Developer Interview Experiences
9 interviews found
Roshni Syed
I appeared for an interview in May 2025, where I was asked the following questions.
- Q1. What is the process for retrieving data from a database using a REST API in Spring Boot with Java?
- Ans.
Retrieve data from a database using REST API in Spring Boot involves creating a controller, service, and repository.
1. Create a Spring Boot application with necessary dependencies (Spring Web, Spring Data JPA, etc.).
2. Define an entity class that maps to the database table.
Example: @Entity public class User { @Id private Long id; private String name; }
3. Create a repository interface extending JpaRepository for CRUD...
- Q2. What is dependency injection, and what are its types?
- Ans.
Dependency injection is a design pattern that allows a class to receive its dependencies from an external source rather than creating them itself.
Promotes loose coupling between classes, enhancing testability and maintainability.
Types of dependency injection include Constructor Injection, Setter Injection, and Interface Injection.
Example of Constructor Injection: A class 'Car' that requires an 'Engine' can receive it t...
- Q3. Write a code for reversing a string in java 8.
- Ans.
Java 8 provides a concise way to reverse a string using streams and collectors.
Use the StringBuilder class: StringBuilder sb = new StringBuilder(originalString); sb.reverse();
Utilize Java 8 Streams: String reversed = originalString.chars().mapToObj(c -> (char) c).reduce("", (s, c) -> c + s);
Another approach is to convert the string to a char array, reverse it, and create a new string: char[] charArray = originalS...
- Q4. Write a code for separating a string as character array.
- Ans.
This code demonstrates how to convert a string into a character array in Java.
Use the `toCharArray()` method: `char[] chars = str.toCharArray();`
Example: `String str = "Hello"; char[] chars = str.toCharArray();`
Iterate through the array: `for (char c : chars) { System.out.println(c); }`
You can also use `String.split()` for separating by delimiters, but it returns a String array.
Anonymous
I appeared for an interview in Jul 2024.
(2 Questions)
- Q1. Method overriding Method overloading Exception Java 8 Find the 2nd non repeating character from a string Find the sum of square of even numbers
- Ans.
The question covers topics like method overriding, method overloading, exceptions, Java 8 features, and string manipulation.
Method overriding is when a subclass provides a specific implementation of a method that is already provided by its superclass.
Method overloading is when multiple methods have the same name but different parameters.
Exception handling is used to handle errors that occur during the execution of a pr...
- Q2. About project
(2 Questions)
- Q1. About project many questions
- Q2. Palindrome code
I applied via Job Portal and was interviewed in May 2024. There were 2 interview rounds.
(1 Question)
- Q1. What is singleton class? Inheritance, Polymorphism, Annotations in spring boot.
- Ans.
A singleton class is a class that allows only one instance of itself to be created and provides a global point of access to that instance.
Singleton classes are often used in Spring Boot for managing resources such as database connections or thread pools.
In Spring Boot, singleton beans are created by default, meaning that only one instance of a bean is created and shared across the application.
To create a singleton bean...
(1 Question)
- Q1. In this round I have been asked for my current roles and responsibilities in current organization, Questions on Design pattern, CI/CD pipeline.
Interview Preparation Tips
Skills evaluated in this interview
Selected
I applied via LinkedIn and was interviewed in May 2024. There were 2 interview rounds.
(1 Question)
- Q1. What are java8 features? Why string is immutable? Difference between the checked exception and unchecked exception? Difference between throw and throws? Difference between inner class and anonymous cla...
- Ans.
Answers to common Java Spring Boot Developer interview questions.
Java8 features include lambda expressions, functional interfaces, streams, and default methods.
String is immutable in Java to ensure thread safety and prevent unintended modifications.
Checked exceptions are checked at compile time, while unchecked exceptions are not. Example: IOException vs NullPointerException.
throw is used to explicitly throw an excepti...
(1 Question)
- Q1. Some behavioural questions and discussed about packages
Skills evaluated in this interview
Agrim Jain
I applied via Referral and was interviewed in Feb 2024. There was 1 interview round.
(2 Questions)
- Q1. Difference between springboot and Spring
- Ans.
Spring is a framework for building Java applications, while Spring Boot is a tool for easily creating stand-alone, production-grade Spring-based applications.
Spring is a framework that provides comprehensive infrastructure support for developing Java applications.
Spring Boot is a tool that simplifies the process of creating and deploying Spring-based applications.
Spring Boot includes embedded servers, which makes it ea...
- Q2. What is stateless and stateful API
- Ans.
Stateless API does not store client state on the server, while stateful API does.
Stateless API: Each request from client to server must contain all necessary information for the server to fulfill the request. No client state is stored on the server. Example: RESTful APIs.
Stateful API: The server stores client state, which can be accessed by subsequent requests. Example: HTTP sessions.
Skills evaluated in this interview
(1 Question)
- Q1. Explain new feature in java (labda, functional interface, default) , what is stream api , filter value not contain null, what is microservice, explain in real time , what is http vs https, inner join , out...
- Ans.
Explanation of Java features, Stream API, microservices, HTTP vs HTTPS, and SQL joins.
Lambda expressions allow for concise syntax to implement functional interfaces.
Stream API provides a way to process collections of objects in a functional style.
Microservices architecture breaks down applications into smaller, independent services.
HTTP is unencrypted protocol, HTTPS is encrypted using SSL/TLS for secure communication.
...
Skills evaluated in this interview
sarthak sethi
I applied via Company Website and was interviewed in Jan 2024. There was 1 interview round.
(1 Question)
- Q1. @Qualifier put patch fsctory sessionfactory transient load get IOC
I applied via Company Website and was interviewed in Apr 2023. There were 3 interview rounds.
Details on past project experience
(3 Questions)
- Q1. What is difference between rest and normal controller
- Ans.
Rest controllers are specifically used for RESTful web services, while normal controllers are used for traditional web applications.
Rest controllers are used to build RESTful web services that can accept and return JSON or XML data.
Normal controllers are used for traditional web applications that render HTML views.
Rest controllers use annotations like @RestController and @RequestMapping to define endpoints.
Normal contr...
- Q2. What is memory leak how will you identify
- Ans.
Memory leak is a situation where a program uses memory inefficiently, causing memory to be allocated but not released.
Memory leak occurs when a program allocates memory but does not release it after it is no longer needed.
Identifying memory leaks can be done using tools like profilers to analyze memory usage over time.
Common signs of memory leaks include increasing memory usage over time, frequent garbage collection, a...
- Q3. AWS concepts and ec2
Skills evaluated in this interview
I applied via Approached by Company and was interviewed in Dec 2021. There was 1 interview round.
(1 Question)
- Q1. Spring boot, java(oops, multithreading,exception handling,strings,etc), mcroservices
Interview Preparation Tips
- Java architecture
- Multithreading
- OOPS
- Exception handling
What people are saying about Infosys
Interview questions from similar companies
I applied via Company Website and was interviewed before Jun 2021. There were 2 interview rounds.
First round was coding as well as aptitude done together went well I guess focusing on codes helps a lot.
(1 Question)
- Q1. 2nd round included tr and mr round went quite enegritic
Interview Preparation Tips
Infosys Interview FAQs
Some of the top questions asked at the Infosys Java Spring Boot Developer interview -
The duration of Infosys Java Spring Boot Developer interview process can vary, but typically it takes about less than 2 weeks to complete.
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