It should be remembered that the Myers-Briggs is a personality test. Therefore, it seeks to find out what the personality of the person is based on the types that are stated. The IQ test is supposed to check out the intelligence of people. Although this is still not 100% accurate, it is still being used by a lot of corporations at present time.
Myers-Briggs is known to be one of the tests that are trusted by a lot of testers especially those from companies who are searching for certain types of workers. They will immediately know if the person is a good fit for the company or not based on the results of the test.
No! No personality test of whatever kind resembles an IQ test. The efficiency with which we solve verbal and non-verbal problems is independent of our preferred ways of interacting with people. That is, insofar as anything we do has an element of personality attached. For instance, nervousness approaching an IQ test versus confidence may have more to do with personality than ability to do well on the IQ test.
However, the results of the personality test would not be expected to affect our intellectual ability which would remain constant irrespective of whether we were an introspective, caring personality or an unfeeling, judging one. You must regard personality testing as of a different order from intelligence testing. The one thing they have most certainly in common is the drive to measure human behaviour; there are many who dislike the whole concept of this.