N-400 Study Guide 2026
Everything you need to pass the N-400 exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 N-400 Exam Format at a Glance
📚 N-400 Topics to Study (22)
✍️ Sample N-400 Questions & Answers
1. A lawful permanent resident files Form N-400 on June 1, 2026. For the 5-year continuous residence requirement, what is the earliest start date of the statutory period USCIS will examine?
USCIS looks back exactly 5 years from the filing date, so for a June 1, 2026 filing, the relevant 5-year window begins June 1, 2021.
2. What territory did the United States buy from France in 1803?
The United States purchased the Louisiana Territory from France in 1803, doubling the size of the country.
3. What type of employment abroad may qualify a permanent resident to preserve continuous residence under N-470?
Eligible employers for N-470 include the U.S. government, American research institutions, U.S. firms engaged in the development of U.S. foreign trade and commerce, and certain public international organizations.
4. What document must a naturalization applicant always bring to the N-400 interview?
Applicants must bring their Permanent Resident Card (Green Card) to the naturalization interview as proof of lawful permanent residence.
5. What happens to the continuous residence requirement if a permanent resident relocates their principal residence outside the United States?
Establishing a principal residence abroad indicates abandonment of U.S. domicile, which breaks continuous residence for naturalization purposes regardless of how frequently the applicant returns.
6. A permanent resident who has served honorably in the U.S. armed forces for at least one year may apply for naturalization with:
Under INA Section 328, honorably discharged veterans who served at least one year can apply for naturalization with no continuous residence or physical presence requirement, though they must still pass the civics and English tests.
🎯 Free N-400 Practice Tests
📖 N-400 Guides & Articles
- N-400 Interview Documents: Complete Checklist of What to Bring
- N-400 Russian Translation: Complete Guide to Navigating the Naturalization Form
- Current N-400 Form: Complete Guide to the U.S. Naturalization Application
- N-400 Physical Presence: Complete Guide to Meeting the Residency Requirement
- N-400 Naturalization Test Questions: Complete Study Guide for U.S. Citizenship
- N-400 Oath Ceremony: Complete Guide to Your Naturalization Ceremony
- Form N-400 Supporting Documents: Complete Checklist and Requirements Guide
- N-400 Interview Questions PDF: Complete Study Guide for Your Naturalization Interview