Caught Cheating - SDE Candidate interview unexpectedly terminated | [Software Engineering Interview]

Summary

The interviewee, a Java developer with five years of experience, discusses their expertise in full-stack development, including front-end technologies like Angular and React, and back-end with Spring frameworks. They mention proficiency in SQL and NoSQL databases, testing tools like JUnit and JERS, and agile methodology. The candidate explains Java's string immutability and contrasts arrays with ArrayLists. They also touch on Java 8 features and provide a coding snippet for filtering employees by salary using streams. Lastly, they give insights on Spring's evolution to Spring Boot, emphasizing its benefits like reduced development time and efficient testing.

Takeaways

• 👨‍💻 The interviewee has five years of experience as a Java developer.
• 🌐 They have full-stack development experience, working on both front-end with JavaScript, Angular, React, HTML, and CSS, and back-end with microservices using Spring Framework.
• 💾 They are comfortable with SQL and NoSQL databases.
• 🔧 They have experience with build tools, testing tools like JUnit and JERS, and have collaborated with QA teams on automation scripts.
• 🔄 The interviewee is familiar with Agile methodology and Spring and Hibernate frameworks.
• 🔒 The reason for String immutability in Java is related to security, synchronization, concurrency, caching, and class loading.
• 📊 The difference between Array and ArrayList is that arrays are fixed-length data structures, while ArrayLists are variable-length collections with additional methods.
• 🌟 Java 8 features include the Stream API, functional interfaces, Lambda expressions, the Optional class, default methods, and method references.
• 💼 The interviewee was asked to write a code snippet to filter employees by salary using Java Streams.
• 🚀 Spring Boot was developed to reduce development time, increase efficiency, and provide default setups for unit and integration testing, encouraging testable code and powerful database transaction management.
• ✋ The interview could not proceed further due to the lack of an IDE, which was a requirement from the interviewer's side.

Q & A

What is the candidate's experience in Java development?

The candidate has been working as a Java developer for about five years, with exposure to various tools and technologies within Java and J2EE.

What front-end technologies has the candidate worked with?

The candidate has experience with JavaScript libraries such as Angular and React, as well as HTML and CSS.

How does the candidate describe their back-end development experience?

The candidate has worked on microservice architecture using Spring Boot and Spring Framework, indicating proficiency with back-end development.

What database technologies is the candidate comfortable with?

The candidate is comfortable working with both SQL and NoSQL databases.

What tools has the candidate used for building and testing?

The candidate has experience with build tools and is comfortable with testing tools like JUnit and JERS, and has collaborated with QA teams to write automation scripts.

How familiar is the candidate with Agile methodology?

The candidate is quite familiar with Agile methodology, having worked on projects based on it.

Why does the candidate think strings are immutable in Java?

The candidate suggests that string immutability is related to security, synchronization, concurrency, caching, and class loading, particularly for parameters presented in network connections and databases.

What is the difference between an array and an ArrayList according to the candidate?

The candidate explains that arrays are fixed-length data structures with basic functionality, while ArrayLists are part of the Java Collections framework and offer more methods. ArrayLists are also variable length collections.

What features of Java 8 does the candidate mention?

The candidate mentions the Stream API, functional interfaces, Lambda expressions, the Optional class, default methods, and method references as features of Java 8.

How does the candidate approach filtering a list of employees by salary?

The candidate suggests using the Stream API to filter employees with a salary greater than a specified amount and then returning or printing the list of filtered employees.

What is the candidate's understanding of the evolution of Spring to Spring Boot?

The candidate views Spring Boot as a development to reduce development time, increase efficiency, provide default setups for unit and integration testing, and encourage writing testable code with powerful database transaction management.

What was the issue with proceeding further in the interview?

The interview could not proceed further because the candidate did not have access to an IDE, which was a requirement for the coding portion of the interview.