Imagination Learning Systems Systems Executive interview questions

it was written. i got one question paper. question was related to core and advanced java. some was related to SQL. after clear that round i got machine round and there i was needed to create one program on server using spring technology. after was HR round. we did discussion for salary. they told me that first 6 month you have to work as a trainee and after 6 month we will provide you job. i got offer letter. but the do not pay salary on time. after working 8-9 month i left that job.