The CPT is an online adaptive test that assesses English language ability in listening, reading, and use of English. It places test takers on the CEFR scale from Pre-A1 to C2 based on their overall score of 0-100. Technical requirements include sufficient processing power, RAM, hard drive space, screen resolution, operating system, internet connection speed, and certain software versions. The document provides instructions for configuring internet explorer security settings, allowing access to the local clipboard, and taking the test, which includes listening sections requiring headphones. A link to a demo test is also provided.