TransUnion Test Engineer Interview Questions and Answers for Experienced

Java 8 introduced significant features like lambdas, streams, and new date/time APIs, enhancing productivity and code readability.

• Lambda Expressions: Enable functional programming by allowing you to pass behavior as a parameter. Example: (a, b) -> a + b.

• Streams API: Facilitates processing sequences of elements, enabling operations like filter, map, and reduce. Example: list.stream().filter(x -> x > 10).collect...read more

I have worked on various technologies including Java, Python, AWS, and Docker.

• Proficient in Java programming language and its frameworks like Spring and Hibernate

• Experience in developing and deploying applications on AWS cloud platform

• Familiarity with Python and its libraries like NumPy and Pandas

• Expertise in containerization using Docker and Kubernetes

• Hands-on experience in database technologies like MySQL and MongoDB

Regression testing is the process of retesting a software application to ensure that new code changes have not adversely affected existing functionality.

• Regression testing is performed after code changes to verify that the existing features still work correctly.

• It helps in identifying any defects introduced by new code changes.

• Automated testing tools are often used for regression testing to save time and effort.

• Example...read more

Smoke test is a preliminary test to check if the basic functionalities of a software application are working correctly.

• Smoke test is a subset of regression testing.

• It is usually performed after a build is deployed to ensure the critical functionalities are working.

• Smoke test is not exhaustive and focuses on the most important features of the application.

• It helps in identifying major issues early in the development cycl...read more

A transaction in Java is a unit of work that is performed as a single, indivisible operation.

• Transactions ensure data integrity by either committing all changes or rolling them back if an error occurs.

• Transactions are typically used in database operations to ensure consistency.

• In Java, transactions are commonly implemented using frameworks like Spring's @Transactional annotation.