Mercedes-Benz Research and Development India Java Technical Lead Interview Questions and Answers

Q1. What are java 8 new features
Ans. 
Java 8 introduced lambda expressions, streams, default methods, and more.
• Lambda expressions for functional programming

• Streams for efficient processing of large data sets

• Default methods to add new functionality to existing interfaces

• Date and Time API for improved handling of date and time

• Optional class to avoid null pointer exceptions

• Nashorn JavaScript engine for improved performance

• Parallel array sorting for faster sor
Answered by AI
Add your answer
Q2. What is the difference between stream and parallel stream
Ans. 
Stream is sequential while parallel stream is concurrent
• Stream is a sequence of elements that can be processed sequentially

• Parallel stream is a sequence of elements that can be processed concurrently

• Parallel stream can improve performance for large datasets

• Parallel stream uses multiple threads to process elements in parallel

• Stream is suitable for small datasets or when order of processing is important
Answered by AI
Add your answer

Q1. What is one problem that interfaces solve that abstract classes do not?
Add your answer
Q2. Write a program that takes a string of words, including spaces and special symbols, and returns each occurrence of a specified character, excluding spaces and special symbols.
Add your answer
Q3. Could you explain how the autowired annotation functions internally?
Add your answer
Q4. How does Spring Boot determine which data source to use for application execution when multiple data sources are available and no specific profile has been defined?
Add your answer
Q5. What can you explain about the qualifier annotation?
Add your answer

Q1. Tell me about yourself
Ans. 
Experienced Java Developer with a passion for creating efficient and scalable applications.
• Over 5 years of experience in Java development

• Strong knowledge of object-oriented programming principles

• Proficient in Spring framework and Hibernate

• Experience with RESTful web services and microservices architecture

• Familiar with Agile methodologies and version control systems like Git
Answered by AI
Add your answer
Q2. Explain Spring Boot flow in your project
Ans. 
Spring Boot simplifies the development of Java applications by providing a set of tools and conventions.
• Spring Boot eliminates the need for manual configuration by providing defaults and auto-configuration.

• It includes embedded servers like Tomcat, Jetty, or Undertow for easy deployment.

• Spring Boot starters help in quickly setting up dependencies and configurations.

• Annotations like @SpringBootApplication and @RestContro
Answered by AI
Add your answer
Q3. Explain Spring Security flow in your project
Ans. 
Spring Security is used for authentication and authorization in Java projects.
• Spring Security provides authentication and authorization support out of the box.

• It can be configured using XML or Java configuration.

• It supports various authentication mechanisms like form-based, basic, and OAuth.

• Roles and permissions can be defined using annotations or configuration.

• Example: @EnableWebSecurity annotation enables Spring Secu
Answered by AI
Add your answer
Q4. What is @SpringBootApplication
Ans. 
Annotation used to mark a class as a Spring Boot application
• Main annotation in Spring Boot to indicate the starting point of the application

• Combines @Configuration, @EnableAutoConfiguration, and @ComponentScan annotations

• Used to enable the auto-configuration feature in Spring Boot

• Reduces the need for XML configuration in Spring applications
Answered by AI
Add your answer
Q5. Coding Question - Find frequency of all the all the elements in Given String
Ans. 
Find frequency of all elements in a given string
• Create a HashMap to store the frequency of each element in the string

• Iterate through the string and update the frequency in the HashMap

• Convert the HashMap to an array of strings for the final result
Answered by AI
Add your answer

Q1. Introduce yourself
Ans. 
I am a Java Developer with 5 years of experience in developing web applications and implementing software solutions.
• 5 years of experience in Java development

• Proficient in developing web applications

• Skilled in implementing software solutions
Answered by AI
Add your answer
Q2. What is Success according to you
Ans. 
Success is achieving personal goals, feeling fulfilled, and making a positive impact on others.
• Success is subjective and can vary from person to person.

• It is not just about achieving wealth or fame, but also about personal growth and happiness.

• Success can be measured by the impact one has on others and the legacy they leave behind.

• Examples of success include reaching career milestones, maintaining healthy relationships...read more
Answered by AI
Add your answer
Q3. What are your strengths and weekness
Ans. 
My strengths include strong problem-solving skills and attention to detail. My weakness is sometimes being too critical of my own work.
• Strength: Strong problem-solving skills - I enjoy tackling complex problems and finding efficient solutions.

• Strength: Attention to detail - I take pride in producing high-quality work and ensuring accuracy.

• Weakness: Being too critical of my own work - I strive for perfection and sometim...read more
Answered by AI
Add your answer
Q4. Tell me about your Family Background
Ans. 
I come from a close-knit family with a strong emphasis on education and hard work.
• Family is supportive and values education

• Parents are both professionals

• Have a sibling who is also in the tech industry
Answered by AI
Add your answer
Q5. How do you solve any problem
Ans. 
I approach problem-solving by breaking down the issue, researching possible solutions, and testing different approaches.
• Identify the problem and gather all relevant information

• Brainstorm potential solutions and evaluate their feasibility

• Implement the chosen solution and test it to ensure it resolves the problem

• Iterate on the solution if needed to improve its effectiveness
Answered by AI
Add your answer

Q1. I have added the questions below
Add your answer
Q2. I have added thebelow
Add your answer

Q1. Based on the resume
Add your answer

Q1. Scenario based questions
Add your answer

Q1. Package discussion
Add your answer

Good coding questions related array and string

Theory plus coding questions

Q1. Core Java , spring boot questions, project
Add your answer
Q2. Project challenges how resolved
Ans. 
Resolved project challenges through effective problem-solving techniques.
• Identified the root cause of the challenges

• Collaborated with team members to brainstorm solutions

• Implemented appropriate strategies to overcome obstacles

• Tested and validated the implemented solutions

• Documented the resolution process for future reference
Answered by AI
Add your answer
Q3. Difficult situation in project while working with team how resolved
Add your answer
Q4. Core string concept in depth
Ans. 
Core string concepts include immutability, string manipulation, and string comparison.
• Strings in Java are immutable, meaning they cannot be changed once created.

• String manipulation can be done using various methods like concatenation, substring, and replace.

• String comparison can be done using equals() method for content comparison and == operator for reference comparison.
Answered by AI
Add your answer
Q5. Soft skills questions
Add your answer

Q1. Programming questions and internal working
Add your answer

Q1. Work experience questions
Add your answer

Q1. Salary Discussion and general background questions
Add your answer