JCB Apprentice Trainee Interview Questions and Answers

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.

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