The level of test you take depends largely on the experience level you have. The ASWB website describes the different level of test as follows:

  • Bachelor's: A basic test for social workers with a BSW and no post-degree experience.
  • Master's: A generalist test for social workers with an MSW and no post-degree experience.
  • Advanced Generalist: A more advanced test for social workers with an MSW and at least two years of post-degree experience in non-clinical settings.
  • Clinical: A more advanced test for social workers with an MSW and at least two years of post-degree experience in direct clinical practice settings.

Each different test level has its own unique question sample, so the difficulty will vary greatly from bachelor's version to the clinical level.