Tripadvisor Software Engineer(Internship) interview questions

They scheduled a phone-screen after I met them at a college career fair. After passing the phone-screen interview, I was assigned a take-home task and was given 48 hours to complete it. Eventually they invited me to do on-site interviews, which included two technical interviews and one behavioral interviews, one hour each.

about 45 mins , basic java knowledge including difference between hash table and hash map, what's the best way to find an element in a sorted array,one code problem