Which assessment is used to test the intelligence of the machine?

Turing Test.

The assessment used to test the intelligence of a machine is commonly known as the Turing Test. This test, proposed by Alan Turing in 1950, evaluates a machine’s ability to exhibit behavior indistinguishable from that of a human. In the test, a human evaluator interacts with both a machine and another human without knowing which is which. If the evaluator cannot reliably distinguish between the machine and the human based on their responses, the machine is considered to have passed the Turing Test, demonstrating a level of intelligence comparable to human intelligence.