From previous interview experience, I had prepared for lots of technical questions. There is an endless amount of different technical questions you could be asked, but if they ask you to ‘describe a stress-strain graph for a brittle material’ and you have not brushed up on these basics it can go pear shaped quickly. Especially for placement roles, they want to make sure you have your basic engineering principles down, the technicalities needed in the role can then be built up from these foundations.