DUOLINGO:

The Duolingo English Test (DET) is an online English language proficiency test that is accepted by many universities and colleges around the world as proof of English language proficiency. The test is designed to assess a student's ability to use English in academic settings and is used for admissions purposes.

The DET is an adaptive test, which means that the difficulty level of the test adjusts based on the test taker's responses. The test includes sections on reading, writing, listening, and speaking, and takes approximately 1 hour to complete. The test can be taken on a computer or a mobile device, and test takers receive their results within 48 hours of completing the test.

The test is scored on a scale of 10-160, with a higher score indicating a higher level of English language proficiency. The test results are valid for two years from the date of the test.

The Duolingo English Test is a relatively new and innovative way to assess English language proficiency, and its popularity is growing rapidly. It is particularly popular among international students who want to study in English-speaking countries but do not have access to traditional English language proficiency tests.