Does the U.S. citizenship test contain errors? Yes, says recently naturalized US citizen Dafna Linzer:
After years of steep filing fees and paperwork (including one letter from Homeland Security claiming that my fingerprints had "expired"), it all came down to a test. I passed, and, my fellow Americans, you could, too -- if you don't mind providing answers that you know are wrong.
Among the answers that are incorect, Dafna writes, are ones regarding whether the Vice President is a member of president's cabinet or merely a cabinet-level officer, what exactly the rule of law is (the test answers stumped lawyers and law professors), and what the Declaration of Independence did ("Heeding my lawyer's advice," she writes, "I went with the official answer: 'declared our independence.'") You can take a practice naturalization test here.
Read on Pro Publica: "How I Passed My U.S. Citizenship Test: By Keeping the Right Answers to Myself"