Edunext Technologies interview questions

i went for walkin. they want expert in DSA so they gave me test which contain 10 DSA question which is easy level DSA. some question are Arrays and some question belong to string

At Edunext, there are three rounds of interviews: the first is a written test, the second is technical, and the third is an HR round. I cleared the first round and was called for the technical interview. First of all, they called me at a certain time, but my interview took place four hours later. In the interview, they asked questions related to strings, arrays, and the collection framework, which I answered. After that, I discussed things with HR, who asked if I could join from next week, and I said yes. HR then mentioned that they would call me, but I never received a call. When I followed up, they said that the fresher positions were filled, and I should try again next time. I don't understand why they conducted my interview if the fresher positions were already filled. It's a very poorly managed company.