I have been receiving calls from recruitment consultants regularly but off late I realize half of them are fake. These consultants contact you stating that they have some openings which match your profile but in order to avoid duplication of CV submission they ask you the name of the companies your CV has been forwarded to and where you are interviewing. And these are the names these idiots want from you.

Please please do not disclose any names of companies to these idiots. For one, they are misusing you and wasting your time and secondly it will harm the genuine recruiters who are helping us find the jobs.
Take my word these recruiters will never get back to you. These recruiters have no openings and are simply collecting names of companies which are hiring.

My advice is simply tell them that your job applications are confidential and cannot be disclosed. After hearng this they will find an excuse and finish the call without discussing any opening(something which they never had

In India, no consultant ever asked me - which all comapnies I had applied to or was interviewing with. Whats wrong with the ethics of these people.