SIE practice exam
The basics, laws, and regulations of the financial markets. You'll need to know the primary and secondary markets, the regulators (SEC and FINRA), and their rules (Act of 1933, etc).
The products of the financial markets, which include stocks, bonds, mutual funds, ETFs, and options. You'll need to know what these products are, the risks of investing in them, and how they benefit investors.
How customers buy and sell securities in their accounts. You'll need to know different types of orders and accounts, how those orders are entered into the market, and the regulations that govern these activities.
How financial professionals operate in their jobs and the rules that govern their activities. You'll need to know FINRA and SEC rules, ethics of working with clients, and general procedures for financial professionals.