"Before 1901, each Australian colony had its own constitution and laws, which governed areas like defense, immigration, postage, trade, and transport. This made coordination between the colonies difficult."
Australian Citizenship Test gives you access to many more tests than just the one practice test available on the government website. That official sample test is good for giving you an idea of what to expect on the real test. But it can't help you prepare fully. Nor does reading the Australian Citizenship: Our Bond material alone.