Test credits are valid for 12 months from the date of invoice and can be used with any test available on the platform.

Isograd Testing Services offers two types of tests:

• Standard tests (1 credit) use a predefined set of questions and are available in multiple difficulty levels. All tests are available in Standard versions except coding tests.
• Premium tests (2 credits) are coding tests and adaptive tests. The difficulty level of the adaptive tests evolves during the test according to the responses of the candidate. The adaptive test provides more analysis into individual skill gaps and comparison against desired skill outcomes. Group and progression reports are included.