Accenture Java Application Developer Interview Questions and Answers

Interfaces vs abstract classes, solid principles, program for factorial using recursive approach, multithreading

Q1. Create one Spring boot controller from end to end. No need to create a spring boot project we just want to see the structure and end to end implementation.
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Q2. Write a java 8 program to get the characters from a string whose count is 2 or more than 2 e.g. input: baseball , output: b, a, l.
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Q3. Why you left your previous organization.
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Q4. What is the functional interface
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Q5. What are the OOPS concepts. and some questions related to inheritance.
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Q6. Asked about the project mentioned in CV (Client project) and asked its architecture.
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Q7. Various SQL join types
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Q1. Are you ready to relocate to job location
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Q2. Why are you leaving your previous organization.
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Q3. Expectation about salary
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Q1. Given an array {1, 2, 1, 4, 5, 4, 8, 7}, how can you use Streams to remove duplicates while retaining only the even numbers?
Ans. 
Use Streams to remove duplicates and retain only even numbers from an array.
• Convert the array to a stream using Arrays.stream()

• Use distinct() to remove duplicates

• Filter out odd numbers using filter()

• Collect the result using collect(Collectors.toList())
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Q2. What is the use of Static and final when you will use Static methods
Ans. 
Static methods can be accessed without creating an instance of the class, while final keyword makes the method unchangeable.
• Static methods belong to the class itself, not to any specific instance

• Final keyword ensures that the method cannot be overridden in subclasses

• Static methods are commonly used for utility methods that do not require access to instance variables

• Example: Math class in Java has static methods like Ma
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Q3. What is the difference between @restController and @controller Annotation
Ans. 
The @RestController annotation is used to define RESTful web services while @Controller annotation is used to define MVC controller.
• RestController is a specialized version of Controller used for RESTful web services

• RestController eliminates the need for @ResponseBody annotation

• Controller is used for traditional MVC controller functionality

• RestController returns data directly without needing to go through a view resolve...read more
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Q4. What is microservices why we use it
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Microservices are a software development technique where applications are composed of small, independent services that communicate with each other.
• Microservices allow for easier scalability and maintenance of complex applications.

• Each service in a microservices architecture can be developed, deployed, and scaled independently.

• Microservices promote flexibility and agility in software development.

• Examples of companies us...read more
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Q1. Coding questions on java8
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Q2. Regarding microservices
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Q3. Internal working of circuit breaker
Ans. 
Circuit breaker is a design pattern used in software development to prevent system failures by temporarily stopping requests to a failing service.
• Circuit breaker monitors the number of failures and opens when a threshold is reached.

• When the circuit is open, requests are not sent to the failing service, preventing further failures.

• After a specified time, the circuit breaker closes and allows requests to be sent again.

• Ex...read more
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Q4. Frequency of occurrence of words
Ans. 
Frequency of occurrence of words in a given text can be calculated by counting each word and storing it in a data structure.
• Split the text into words using whitespace as delimiter

• Create a map to store word frequencies

• Iterate through the words and update the frequency count in the map

• Return the map with word frequencies
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Q5. How spring boot will work two databases
Ans. 
Spring Boot can work with two databases by configuring multiple data sources and using @Primary annotation.
• Configure multiple data sources in application.properties or application.yml

• Use @Primary annotation to specify the primary data source

• Use @Qualifier annotation to specify the secondary data source

• Example: @Configuration @EnableTransactionManagement public class DatabaseConfig { @Primary @Bean(name = "primaryDataSo...read more
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The first round was an interview conducted with a GENAI virtual bot.

Q1. Internal architecture of Spring boot, how enable autoconfiguration works
Ans. 
Spring Boot uses autoconfiguration to automatically configure the Spring application based on dependencies and properties.
• Spring Boot autoconfiguration is achieved through @EnableAutoConfiguration annotation

• Autoconfiguration classes are located in the org.springframework.boot.autoconfigure package

• Autoconfiguration classes are conditionally applied based on the presence of specific classes or properties
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Q2. Questions mostly on microservices and coding question on restTemplate
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Onlin test consist pf easy numerical questions

Easy questions not so difficult

Q1. Java oops concept
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Q2. Basic sprophramming questions
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Q3. Networking firewall cisco
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Q1. Personal questions
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Q2. Whetehr to willing to work in any locations
Ans. 
Yes, I am willing to work in any location for the right opportunity.
• I am open to relocating for the right job opportunity

• I am flexible and adaptable to new environments

• I believe working in different locations can provide valuable experiences and growth opportunities
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Q1. Transactions in springboot
Ans. 
Transactions in Spring Boot manage database operations as a single unit of work to ensure data integrity.
• Spring Boot provides support for declarative transaction management using @Transactional annotation.

• Transactions can be configured at class or method level.

• Transactions can be rolled back in case of exceptions to maintain data consistency.

• Example: @Transactional annotation on a service method ensures that all databa...read more
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Q2. Difference between arraylist and linked list

Ans. 

ArrayList is resizable array implementation, LinkedList is doubly linked list implementation.

• ArrayList uses dynamic array to store elements, LinkedList uses doubly linked list.

• ArrayList is faster for accessing elements by index, LinkedList is faster for adding/removing elements.

• Example: ArrayList arrList = new ArrayList<>(); LinkedList linkedList = new LinkedList<>();

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