The Duolingo English Test has a different exam pattern than IELTS, TOEFL and PTE, as there is no partition of questions based on Reading, Listening, Speaking and Listening documents. Duolingo exam questions are interactive and test your considerable skills in a single question. The exam will be conducted in Online mode only. Hence you can attempt it from anywhere.
Here is a detailed overview of what you should expect in the Duolingo English Test (DET) of 1 hour.
Here are the adaptive test question types of the Duolingo English Test.