The computer-based test (CBT) gives examinees the opportunity to take the TOEFL using computer terminals equipped with a keyboard and mouse. In the TOEFL paper exam, you have to fill in the bubbles with an HB pencil.
The CBT incorporates obligatory writing, listening, and reading comprehension sections. The computers also have the ability to weigh the difficulty levels and the corresponding competency of students to answer correctly. For example, if you answer a question correctly, the computer automatically heightens the level of difficulty. On the other hand, if you provide a wrong answer, the computer proceeds to an easier question. This computer-adaptive mechanism works to give each student a fair chance at passing the test.
The CBT exam also has visuals along with the listening section. By this addition test takers are able to see illustrations of what is being said. The convenience of the computer-based exam provides fewer TOEFL questions, and you can expect to gain your scores immediately after the exam whereas test takers of the paper-based exam must wait on results for seven to ten days in the U.S. and four to six weeks elsewhere.