Tesco interview questions

Got a call asking my availability about the job I had applied to on the website. Later got an email to upload right to work documents and then one saying to book interview. Then I rocked up to the interview all confident and ready to get hired... Until I realised they made it a group interview without informing anyone. I hadn't prepared for a group interview so I was a bit distraught and shy, didn't get the job though, probably because there were two other people who stood out really well and had loads of experience.