IBM Software Engineer Internship interview questions

Examples of concurrent sorting algorithms.

Relational Databases - levels of isolation.

Questions about Mockito/Spring/JUnit annotations (shown in an example code snippet).

I had to describe a solution the task where there were 2 very large files (that won't fit into an operating memory) and there was a need to perform some kind of operations on them, that will result in the creation of a third file containing the outcome.