If you are seeking U.S. citizenship through the process known as "naturalization," which includes submitting Form N-400 and attending an interview at an office of U.S. Citizenship and Immigration Services, you will need to be prepared for an exam covering U.S. civics and history. Fortunately, USCIS supplies a list of the 100 questions and answers. This list is also shown in Nolo's book Becoming a U.S. Citizen.
However, since that book was published, and perhaps even since you began your studying, answers to some of the questions have changed. This is due to the recent swearing in of a new U.S. President and a newly elected group of people in the Senate and House of Representatives having begun their new term. Your state governor might also have changed.
For starters, to the question of "What is the name of the President of the United States now?" you can answer any of the following: "Joseph R. Biden, Jr.," "Joe Biden," or "Biden."
To the question of "What is the name of the Vice President of the United States now?" you can answer "Kamala D. Harris," "Kamala Harris," or "Harris."
In line with the above two changes, the answer to "What is the political party of the President now?" is now "Democratic" or "Democratic Party."
To find the answer to the question of "Who is one of your state's U.S. senators now?" you'll need to check www.senate.gov.
To find the answer to the question "Name your U.S. representative," go to www.house.gov.
To find the answer to the question of "Who is the governor of your state now?" check the State Government page of USA.gov.
If all goes as expected, it should be a couple of years before the answers to any of these questions changes again! But keep your eyes on the news and on Nolo's updates, just in case.