1st virtual round via MS Teams. Mostly HR calls and ask us to book multiple slots provided on available dates via their Accenture portal.

Interview was good, interviewer was good as well.

1st round interview questions:

Design pattern:

• Builder design
• Factory design

Spring boot annotations:

• Setter, constructors dependency injection, 3 ways to inject

• @Configuration

• @SpringBootApplication --?

• @Transaction annotation

• @Service, @Controller, @Repository - what's the difference and what do they actually do with those annotations

• Spring vs Spring Boot, why?

• Left outer join, outer join, what happens for no row selected

• ORM vs JDBC

• JPA, JDBC template

• @Entity

• @Component scan

• CompletableFuture, Executor framework for API calls?

• Blocking calls?

• Thread.sleep - when to use?

• Notify, wait, producer consumer

• Hashtable vs HashMap

• Fail fast and fail safe

• ConcurrentHashMap vs Hashtable

• Sorting algorithm: bubble sort

• Streams for loop vs general for loop

• HashMap collision - explain internal, what's tree inside HashMap?

• When size of HashMap grows?

• Why tree is introduced in HashMap?

• How searching will be faster in it?

• Initially, is it arrays or ArrayList in HashMap?

• Internal working of Hashtable

• When did you last use thread or executor framework?

• Yield, join