Ideas2IT Technologies Senior Software Engineer Interview Questions and Answers

Functional interface is an interface with only one abstract method. Benefits include lambda expressions and improved code readability.

• Functional interface allows for the use of lambda expressions, which can simplify code and improve readability.

• It also enables the use of method references, which can make code more concise.

• Functional interfaces are used extensively in Java 8's Stream API.

• Transaction uses include ensurin...read more

Different isolation levels in transactions and their purpose.

• Isolation levels determine how transactions interact with each other.

• READ UNCOMMITTED: Allows dirty reads, can cause phantom reads.

• READ COMMITTED: Prevents dirty reads, but allows non-repeatable reads.

• REPEATABLE READ: Prevents dirty and non-repeatable reads, but allows phantom reads.

• SERIALIZABLE: Prevents all three types of reads, but can cause deadlock.

• Purpo...read more