The particle ka is probably the easiest to use of all the Japanese particles. Ka is added to a sentence to make it into a question. These questions may or may not have begun with a question word. They might be used to confirm a statement that was already made. Just as in English, if the sentence is a question, the intonation used will go up at the end.
For example, with ka at the end of Genki desu ka?, the sentence means How are you? or Are you well? Without the ka, you could give your answer as Genki desu, meaning I am well.
The particle no can be a bit more confusing. It can sometimes be used similarly to ka to make a statement into a question. It can also be said at the end of a statement.