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Atos Java Developer Interview Questions and Answers
Atos Java Developer Interview Experiences
5 interviews found
Yashashri Sandip Vanjari
I applied via Naukri.com and was interviewed in Jan 2022. There were 3 interview rounds.
(2 Questions)
- Q1. Constructor, Interface, Abstraction, Spring boot, Microservices
- Q2. What is super keywords? What is Interface? What is constructor? What is use of @Componentscan ?
- Ans.
Answers to common Java Developer interview questions.
super keyword is used to call a method or constructor of the parent class
Interface is a collection of abstract methods and constants that can be implemented by a class
Constructor is a special method used to initialize objects
@Componentscan is used to scan for Spring components in a specified package
(1 Question)
- Q1. They asked all technical questions again and also had discussion on project
(1 Question)
- Q1. We had a discussion on CTC part and last organization.
Interview Preparation Tips
- Core Java
- Spring Boot
- Micro-services
Skills evaluated in this interview
Praveen Pk
Selected
I applied via Naukri.com and was interviewed in Jul 2024. There were 2 interview rounds.
They asked question about myself
Gave codeing in advance java concepts
Anonymous
(1 Question)
- Q1. Java8, Spring Boot, Microservices
Selected
I applied via Recruitment Consulltant and was interviewed before Oct 2022. There were 3 interview rounds.
(2 Questions)
- Q1. Basic java fundamental
- Q2. Spring boot microsercices
(2 Questions)
- Q1. This Round wholy Depends on Project
- Q2. Project Discussion
Interview Preparation Tips
Atos interview questions for designations
Selected
I applied via Campus Placement and was interviewed before Aug 2022. There were 5 interview rounds.
Good and quite easy to crack most of them
Some awareness of the languages
(1 Question)
- Q1. Java interview like polymorphism,datatypes
(1 Question)
- Q1. Self introduction
Top trending discussions
Interview questions from similar companies
Selected
I applied via Approached by Company and was interviewed in Dec 2024. There was 1 interview round.
(8 Questions)
- Q1. What improvements to interfaces were introduced in Java 8 that were missing in Java 7, specifically regarding static and default methods?
- Ans.
Java 8 introduced static and default methods in interfaces, allowing for method implementation and code reusability.
Java 8 introduced static methods in interfaces, allowing for method implementation directly in the interface itself.
Default methods were also introduced in Java 8, enabling interfaces to have method implementations without affecting implementing classes.
Static methods in interfaces can be called using the...
- Q2. Explain internal working of HashMap ? How to synchronize it ?
- Ans.
HashMap is a data structure that stores key-value pairs and uses hashing to efficiently retrieve values.
HashMap uses an array of linked lists to store key-value pairs.
When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.
If multiple keys hash to the same index, a linked list is used to handle collisions.
To synchronize a HashMap, you can use the synchronizedMap() m...
- Q3. Given a list of employees with their ratings, how can you sort the employees based on their ratings using the Java 8 Streaming API?
- Q4. Will the program compile if the parent class throws a runtime exception while the child class throws an arithmetic exception?
- Ans.
No, the program will not compile if the parent class throws a runtime exception while the child class throws an arithmetic exception.
In Java, if a parent class method throws a checked exception, the child class method can only throw the same exception or its subclasses.
ArithmeticException is an unchecked exception, so if the parent class throws a checked exception and the child class throws an unchecked exception, the ...
- Q5. In a Spring Boot application with two databases, how can you configure JDBC to specify which database to use?
- Ans.
Configure JDBC in Spring Boot to specify which database to use
Define multiple DataSource beans in the configuration class
Use @Primary annotation to specify the primary DataSource
Use @Qualifier annotation to specify the secondary DataSource
Inject the DataSource beans where needed in the application
- Q6. How to use a jetty server in your spring boot application ?
- Ans.
To use a Jetty server in a Spring Boot application, you can configure it as a dependency and customize its settings.
Add Jetty server dependency in your pom.xml file
Exclude Tomcat server dependency if it's included by default in Spring Boot
Configure Jetty server settings in application.properties or application.yml file
Example: Add Jetty dependency - <dependency> <groupId>org.springframework.boot</groupId...
- Q7. Difference between @RequestParam and @PathVariable ?
- Ans.
RequestParam is used to extract query parameters from the URL, while PathVariable is used to extract values from the URI path.
RequestParam is used for query parameters in the URL, while PathVariable is used for values in the URI path.
RequestParam is optional, while PathVariable is required.
RequestParam is used with the @RequestParam annotation, while PathVariable is used with the @PathVariable annotation.
Example: @Requ...
- Q8. How would you handle a scenario where one microservice is awaiting a response from another microservice that is taking an extended time to respond?
- Ans.
I would implement timeout mechanisms and retries to handle the scenario of one microservice awaiting a response from another microservice taking an extended time.
Implement timeout mechanisms in the calling microservice to limit the waiting time for a response.
Set up retry logic to automatically resend the request to the slow microservice if no response is received within the specified timeout period.
Use circuit breaker...
Interview Preparation Tips
Selected
I applied via Naukri.com and was interviewed in Dec 2024. There was 1 interview round.
(6 Questions)
- Q1. Java 8 , java 11 and java 17 features?
- Ans.
Java 8 introduced lambda expressions, Java 11 added local-variable syntax for lambda parameters, and Java 17 included sealed classes and pattern matching.
Java 8 introduced lambda expressions for functional programming.
Java 11 added local-variable syntax for lambda parameters to simplify code.
Java 17 included sealed classes to restrict inheritance and pattern matching for instanceof checks and type casts.
- Q2. Dispatcher servlet, design patterns
- Q3. @SpringbootApplication annotation, actuators
- Q4. String Coding question with java 8 features such as lambda function and stream api
- Q5. Number of words in a string
- Ans.
Count the number of words in a given string.
Split the string by spaces and count the number of resulting elements.
Handle edge cases like multiple spaces or empty strings.
Consider punctuation marks as part of words unless specified otherwise.
- Q6. Microservice design patterns
(2 Questions)
- Q1. Explain architecture of your project
- Q2. Some questions on Java, Spring Boot and sql
(2 Questions)
- Q1. Project flow and some behavioural questions
- Q2. Project contribution of yours
- Ans.
Developed a web application for tracking employee attendance and performance
Implemented user authentication and authorization using Spring Security
Utilized Hibernate for database interaction and data persistence
Designed and developed RESTful APIs for frontend integration
Used AngularJS for frontend development to create interactive user interfaces
(1 Question)
- Q1. Basic formalities before offer release
Interview Preparation Tips
I applied via Naukri.com and was interviewed in Nov 2024. There was 1 interview round.
(3 Questions)
- Q1. Difference between hashmap and hash table
- Ans.
HashMap is non-synchronized and allows null values, while HashTable is synchronized and does not allow null values.
HashMap is non-synchronized, meaning it is not thread-safe, while HashTable is synchronized and thread-safe.
HashMap allows null values for both keys and values, while HashTable does not allow null keys or values.
HashMap is generally preferred for non-thread-safe applications, while HashTable is used in mul
- Q2. Static block related questions
- Q3. Arraylist and linkedlist question
Skills evaluated in this interview
I applied via Company Website and was interviewed in Nov 2024. There were 3 interview rounds.
A standard online test conducted through one of the testing platforms.
(4 Questions)
- Q1. Java 8 features
- Q2. Rest API
- Q3. Java 8 coding problem
- Q4. Collections
(1 Question)
- Q1. It was based on my previous project
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