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 Waiver Form: How to Request a Fee Waiver for Your Naturalization Application
- N-400 Paper Form: How to Download, Complete, and Submit
- N-400 Test Exemptions: Who Qualifies and How to Apply
- Form N-400 Document Checklist: Every Supporting Document You Need for Naturalization
- Form N-400 Part 11: Complete Guide to Additional Information Questions
- Form N-400 Questions and Answers: Complete Practice Test Guide
- Form N-400 Part 10: Complete Guide to the Additional Information Section
- N-400 Interview Documents: Complete Checklist of What to Bring
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An AI chatbot can quiz you, but it can't reproduce the exam conditions or keep your record. Here you get:
- A timed, full-length N-400 mock exam — 65 questions in 80 minutes with a 60% pass mark, modeled on the official exam's question count and time limit, followed by a score report broken down by exam domain.
- A fixed N-400 question bank: the same test every attempt, so your score is comparable from one try to the next instead of changing with every regenerated quiz.
- Progress saved on your device: completed tests, scores and missed questions stay in My Progress, so you can retake only what you got wrong.
- A printable N-400 cheat sheet you can print or save as a PDF.
- N-400 flashcards built from the same question bank.
- Free N-400 practice tests with the correct answer shown after each question.