Overview
Did you know that you can use a single interview link for doing multiple interviews with the candidate? Many users are already using it and it has saved a lot of time.
Here is how :
Scheduling HackerRank interviews with candidates and multiple interviewers using a single interview link has helped recruiters save a big chunk of their time. The single interview link has also resulted in a better candidate experience as they can remain in the same link throughout the onsite interview process instead of juggling multiple links for each interview.
With multiple interviews happening using a single link, it becomes essential to ensure that the participants inside the interview are not disturbed by the sudden appearance of others. With this in mind, we have introduced the concept of the virtual lobby for HackerRank interviews.
Enabling Virtual Lobby
The virtual lobby will not be enabled for your account by default. If you want to enable virtual lobby for your interviews, go to the interview settings page and tick the check box Enable Virtual Lobby.
Enabling Virtual Lobby
Candidate Lobby
The candidate’s lobby is a virtual waiting room for candidates to wait before entering the interview. Inside the lobby, candidates will get the real-time status of all participants in the interview. This is how the lobby looks to a candidate.
HackerRank's Lobby
As an interviewer, you will get notified when a candidate enters the lobby. Click on the Admit button to allow candidates inside the interview.
Admitting a Candidate
Also, candidates are automatically pushed back to the lobby when all the interviewers leave the interview. 
Moving to lobby
Tip: With the candidate lobby, you can set up your interview questions ahead of the interview time and not worry about the questions being leaked to the candidate before the interview.
Interviewer Lobby
With multiple interviewers accessing the same link for an interview, there are chances of interviewers or recruiters abruptly entering the interview while it is already in progress. Such situations can be awkward and create discomfort for the participants of the current interview.
We have introduced the Interviewer Lobby to prevent such scenarios and provide a great interview experience.
The interviewer lobby is a virtual waiting room where interviewers can wait when another interview is in progress or join the same interview. When in the interviewer lobby, interviewers and recruiters can also get an idea of the real-time status of all participants in the interview.
Interviewer lobby
Leave / End Interview
When multiple interviewers access an interview using the same link, there are high chances of one interviewer abruptly ending the interview when the interview is still going on with the candidate and other interviewers. To avoid such unwanted situations, Interviewers can use the Leave Interview option and leave the interview without disturbing others. Otherwise, they can also use the "End Interview for all" feature that will end the session for all the participants present inside the interview. The interview session will remain running and will not end unless an interviewer performs this action.
Both the options are available under the "Leave" dropdown in the top right corner inside the Interview as shown in the image below.
leave / End Interview