Delivery Module Lead Interview Questions and Answers

Streams are a new feature in Java 8 that allow for efficient processing of collections.

• Streams are a sequence of elements that can be processed in parallel or sequentially.

• They can be created from collections, arrays, or other sources.

• Operations can be performed on streams such as filtering, mapping, and reducing.

• Streams can improve performance by allowing for lazy evaluation and short-circuiting.

• Java 8 also introduced lambda expressions and method references to work with str...read more

Bug and defect are terms used interchangeably in software testing.

• Bug and defect refer to the same thing in software testing.

• A bug/defect is an error or flaw in a software application.

• Bug is a more commonly used term, while defect is more formal.

• Bug is often associated with functional issues, while defect can refer to any type of issue.

• Bug/defect can cause the software to behave unexpectedly or not as intended.

• Examples: a button not working, incorrect calculation, system cras...read more

Isolation levels in databases determine how transactions interact with each other.

• Isolation levels define the degree to which one transaction must be isolated from other transactions.

• There are different levels of isolation such as Read Uncommitted, Read Committed, Repeatable Read, Serializable.

• Higher isolation levels provide more data consistency but can also lead to more performance overhead.

• Isolation levels help in preventing issues like dirty reads, non-repeatable reads, a...read more

Annotations in Spring Boot are used to provide metadata about the application and its components.

• Annotations are used to configure the Spring application context, define beans, and enable various features.

• Examples of annotations in Spring Boot include @SpringBootApplication, @RestController, @Autowired, @Component, @RequestMapping, etc.