I got a call from Epic within two weeks of applying for the Rembrandt test. It was very easy.

Soon after, I got a telephonic call from a member of HR. I was just asked about my research work.

The overall conversation was casual, and the interviewer explained a lot about Epic, a lot.

I received an email after about a month that I had to schedule a four-hour exam in a test center.

The test consisted of basic math and four programming questions. The programming questions were not difficult, and anyone from a CS background would do very well on them.

I received an email from them after two weeks stating that I did not make it to the next round, without any reasons.

Honestly, I do not understand their selection criteria. It cannot be the score of the test, as I was very confident about it.

I know people who got into their onsite interview just after the telephonic process. Some people, not confident about their tests, went through to the next round.

Find well-ordered numbers for n digits. For example, for 3 digits, 138 is a well-ordered number as 1 < 3 < 8, but 154 isn't as 1 < 5 > 4.