I got the interview through a consultancy. As part of the initial discussion, they had more questions on projects and corresponding technologies like web services and Java.

The first round was a telephonic interview and I received questions on basic Java, Spring, and Maven. It was a nice discussion, but I had not prepared very well for it.

As others mentioned, preparing for core concepts will be good enough for the initial round.

1. Methods of Java Objects

2. Importance of hashCode() and equals() methods

3. How to sort a list of custom objects, where the sort attribute is given as a string

4. How Spring's Autowired works

5. Maven lifecycle