Click Labs Node JS Developer interview questions

I got a call from hr(she picked my profile from LinkedIn) of click labs and ask me for share resume, I share my resume with her and after 4-5 days i got another call from hr and she told me my resume has been selected and ask me for which time I m able to give interview. 1. Around 2:30 a call came from click labs and I give interview on telephone totally question ask from node ,mongo and angular js 2. After 2 days another call came from hr and she ask me for another round of interview at 2:30 I give interview and this time I am very nervous and I fell that my interview doesn't satisfy interviewers 3. Next day a mail came from click labs and I am not selected, at this time I am very sad because this is first time when I am not selected at any interview but its a great experience. I don't know what is the environment of company inside but I think click labs is a great company and I miss the chance to work here..