There were 3 rounds of telephonic interviewing with one department and 2 rounds with another. I was shortlisted in both and was called on-site. The interviews and written tests lasted a whole day. It was very tiresome, as I expected. I lost out in the round before the final round. The written tests were based on image processing. The 1-1 interviews were based on your answers in the written tests.
Logical puzzles
The following metrics were computed from 70 interview experiences for the KLA Applications Engineer role.
KLA's interview process for their Applications Engineer roles is very selective, failing most engineers who go through it.
Candidates reported having very good feelings for KLA's Applications Engineer interview process.