It can be for the reason that the test banks doesn't cover all the corners of their textbooks,or it can be that the questions and answers are not up to the mark.
Test banks are more common these days. Students are using the test banks for acquiring knowledge on a particular concept whereas the professors are using it for crafting the questions.
Test banks are more common these days. Students are using the test banks for acquiring knowledge on a particular concept whereas the professors are using it for crafting the questions.