yes, it is possible that you can hypnotize someone with the help of black magic. but not to a larger extent. because hypnotism is basically the form of vashikaran. which means that you have to control someone under you.
yes, definitely black magic is possible in today's world. because this is the time when a person suffers a lot of problems in their life. because of the presence of many enemies around them. so this is the time when they usually use the supernatural powers in order to protect them.
brainwash and hypnosis are the two different terms. both have their own meaning in their life. if we take hypnosis, it is the process by which we can control someone's mind for a while. however, in the technique of brainwash expert can remove the memory of a certain time from his/her brain.
black magic is the most powerful form of magic. moreover, it is also very effective to perform. with the help of black magic, you can surely able to solve all your problems. either if you want to control someone's mind then you can also do it with the powerful totkas of the black magic.
if the person is in the control of black magic. then certain signs and symptoms of the effect of black magic are seen on the personality of the person. moreover, they act in a different manner, as they behave in their daily or regular routine.