e-con Systems Hardware Project Engineer Trainee interview questions

They conducted a total of four rounds , The first 2 round ,The first round was conducted for all department students it consisted of logical reasoning questions , That round consisted of 5 two mark questions regarding the mathematical section such as honeybee hive , with 10 balls how to add four balls in five line each,and it also consisted of 4 (5 mark question ) in which they asked such as crack the code, tank a nd tank b water filling those kind of questions were available and they also conducted another round which consist of the questions related to gates, and electrical electronics core questions.