Is it permissible to go on a job interview at 11:30 am on Tisha B’Av?
You should not go to a job interview, especially since it is before chatzos. Try to push it off for another day. If you will incur a large loss there is room to allow it after chatzos. However it is also not advisable, as the gemorah says that a person will not benefit from the money earned because of work on Tisha B’av
O:CH 554-22,23,24, M:B ibid 45, 48, 49.