Cognizant Java Senior Developer interview questions

Screening round, Technical interviews, HR round. Completed in 2 days. Interview was virtual. Technical questions on java, Spring Boot and Data base were asked. Few design questions as well were asked.

I got call from cognizant HR directly and completed 2 rounds of interview. before conducting the interview they asked for the expected salary that time they told fine for them. after completion of the 2 nd round HR will call and tell your expected salary is higher then our budget as per the management and he told he needs approval to release offer for my expected salary. Post this also you need to call them and ask for the approval status and after 1 month when i called again the HR is telling approval got rejected sorry we cant hire you. worst interview ever with cognizant