Top Accenture Java Interview Questions 2025

If you’re looking for the latest Accenture Java Interview Questions in 2025, you’re in the right place. Whether you’re a fresher, have 3 years of experience or are appearing for a Java Full Stack role, this covers everything you need—from core Java to Spring Boot and microservices, along with sample programming questions.

This guide includes:

• ✅ Frequently and Recently asked Accenture Java developer interview questions
• 🧠 Realistic, interview-style answers
• 📌 Specific to Accenture Java Spring Boot Interview Questions
• 💡 Relevant for both freshers and experienced professionals

Core Accenture Java Interview Questions

1. What are OOPs concepts? Is multiple inheritance possible in Java?

In Java, the core OOPs concepts are:

• Encapsulation
• Inheritance
• Abstraction
• Polymorphism

Multiple inheritance with classes is not supported to avoid ambiguity (diamond problem). However, it’s possible using interfaces.

2. What is the difference between Abstract Class and Interface?

An abstract class can have both abstract and concrete methods, while an interface in Java 8 onwards can have default and static methods along with abstract ones. Interfaces are used for full abstraction and multiple inheritance. Abstract classes are preferred when we need shared base functionality.

3. What are the Access Modifiers in Java?

Java provides:

• private – accessible only within the class.
• default – accessible within the package.
• protected – accessible in the package and by subclasses.
• public – accessible from anywhere.

4. What is the difference between equals() and ==?

• == Checks object reference equality.
• equals() checks logical equality (values inside objects).

Example:

javaCopyEditnew String("A") == new String("A") // false  
new String("A").equals(new String("A")) // true

5. Difference between ArrayList and LinkedList?

• ArrayList is backed by arrays → fast for searching.
• LinkedList is node-based → fast for insertion/deletion.

Use ArrayList when reads are frequent; use LinkedList for frequent adds/removals.

6. What is synchronized in Java?

It is a keyword used to lock an object or method, so that only one thread can access it at a time—used in multithreading to prevent race conditions.

☕ Java 8 Features

7. What are the new features in Java 8?

Key additions:

• Lambda Expressions
• Stream API
• Functional Interfaces
• Optional
• Default & Static Methods in Interfaces

These help write more concise, readable, and functional code.

8. What is a Functional Interface?

An interface with only one abstract method.

Example:

javaCopyEdit@FunctionalInterface  
interface MyFunction {  
    void execute();  
}

Common ones: Runnable, Callable, Predicate, Function

9. What is a Lambda Expression?

It’s a way to pass behaviour (functions) as parameters.

Example:

javaCopyEdit(int a, int b) -> a + b

Used heavily with Streams and functional interfaces.

10. What is Stream API?

Stream API helps process data in a declarative functional way.

Example:

javaCopyEditList<Integer> even = list.stream().filter(n -> n % 2 == 0).collect(Collectors.toList());

Spring & Spring Boot

11. What are Spring Boot features? Why is it used?

• Auto Configuration
• Embedded Server (Tomcat/Jetty)
• Spring Boot Actuator
• Standalone setup with minimal config

It’s used to build microservices faster and reduce boilerplate code.

12. What is Dependency Injection (DI)? How did you use it in your project?

DI is a pattern where dependencies are provided to a class, not created by the class.

In my project, I used constructor injection with @Autowired to inject services into controllers.

13. What is @Qualifier?

Used with @Autowired to specify which bean to inject when multiple beans of the same type exist.

javaCopyEdit@Autowired  
@Qualifier("customService")  
private Service myService;

14. What is @SpringBootApplication?

It’s a meta-annotation that combines:

• @Configuration
• @EnableAutoConfiguration
• @ComponentScan

It marks the main class of a Spring Boot app.

15. What is a Spring Profile?

Spring Profiles allow setting up different configurations for different environments, like dev/test/prod.

Use:

javaCopyEdit@Profile("dev")  
@Bean  
public DataSource devDataSource() { ... }

Activate via:

propertiesCopyEditspring.profiles.active=dev

16. What is the default port of Spring Boot?

8080

You can change it using:

propertiesCopyEditserver.port=9090

Microservices Interview Questions

17. What are Microservices?

An architecture style where applications are broken into independent services. Each service runs independently and communicates via REST APIs or messaging queues.

18. How to connect to multiple Microservices?

• Use Eureka (service discovery)
• Use Feign clients for REST calls
• Use API Gateway for routing and security

19. Are REST calls between Microservices synchronized?

Yes, by default they are synchronous using REST (blocking). But for better resilience, we use asynchronous messaging like Kafka or RabbitMQ.

Programming Questions

1. Count the frequency of characters in a String

javaCopyEditMap<Character, Integer> freq = new HashMap<>();
for (char ch : str.toCharArray()) {
    freq.put(ch, freq.getOrDefault(ch, 0) + 1);
}

2. Sort an Array [4, 0, 2, 1, 0, 2, 1]

javaCopyEditint[] arr = {4, 0, 2, 1, 0, 2, 1};
Arrays.sort(arr);
System.out.println(Arrays.toString(arr));

Or for only 0,1,2 — use counting sort (aka Dutch National Flag algorithm).

Must-Know Additional Questions

• What is the difference between @Component, @Service, and @Repository?
• How does Optional help avoid NullPointerException?
• How does Garbage Collection work in Java?
• Lifecycle of a Spring Bean
• Global Exception Handling in Spring Boot using @ControllerAdvice
• Difference between Monolithic and Microservices
• What is the Circuit Breaker pattern? (Use Resilience4j or Hystrix)

Conclusion

Whether you’re preparing for Accenture Java Developer Interview for 3 years experience, or you’re a fresher looking for entry-level questions, these topics are crucial.

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