Does an IQ Test Measure a Person's Intelligence

An intelligence quotient test, also known as an IQ test, measures a person's intelligence. I personally dont believe that an IQ test can test someones knowledge. Some factors such as if the person is not a good test taker, or can not concentrate under pressure would cause the IQ test to not be a reliable source when determining there knowledge. Many students are very intelligent but they have difficult time when taking tests. IQ tests are an insufficient way of testing one's true knowledge.