telephonic interview was called for 45 minutes. I really suck in programming. Question was simple but could not complete in time although I completed the brute force method but interviewer was asking for an improved solution and I could not provide that. I really need to catch up on my programming for these type of interviews.

Got Linkedin inmail from recruiter . gave hackeRank test, passed it, Then arranged phone screen , was easy as far as I feel . But since then no answers, I tried emailing to recruiters , calling them, left voice mails, no replies. Have no decency or manners reply back , give update. Total waste of time interviewing with them. Very bad recruiting experience overall.