KLA Applications Development Engineer interview questions

For an electrical engineering back ground, telephonic questions are: 1Q. Working principle of self excited DC machine. 2Q. Difference between a BJT and a MOSFET and which is cheap to manufacture and why. 3Q. (trivial) If a heavy mass and light mass are dropped from a same height, which reaches ground earlier? 4Q. Why do you want to join the company? Onsite Interview: First round: Image analyzing questions like which algorithm is better? (specific algorithms were given initially). Second round: Why do you think that is better? what are the advantages and disadvantages of them? Third round: How will you decide warranty cost of a product which is just now released. Also typical HR questions. Fourth round: (Search internet for detailed question) 1Q. Four people want to cross bridge and take time 1, 2, 7, 10 min. Lantern is required and only two people can cross. What is the minimum time in which all 4 can cross? 2Q. 100 toggable bulbs and 100 members. nth person toggles all bulbs which are multiples of n. Initially all are switched off and all 100 were given chance to toggle. Finally which bulbs remain on? 3Q. 3 Baskets and you know that one with apple, other with orange and last one with both which are not labelled. You can pick one fruit, look at it and put it back. In how many trials you can label the baskets. Fifth Round: Given a presentation and had questions on that regarding team work and personal contributions, uniqueness and value of the project along with some technical questions. Next day: One round: Typical HR questions like what things you want to improve and what you lack? Why this company? How you worked in a team? Most stressful situation?