か is the ひらがな(hiragana) character pronounced "ka." か can also be used as a particle which is a small word that goes on the end of words and phrases to indicate how they relate to other parts of the sentence.
か is a tough one. Hope you're ready for this.
か indicates a question
Yep that's it. Just put it at the end of your question sentence and translate it as "?"
Note: When writing in Japanese don't end your sentence with a question mark. か will simply be followed by a Japanese period " 。"
Let's look at a simple yes/ no question first.
Hiragana: だいがくせいですか。 (Are you) a college student?
Romanji: daigakusee desu ka.
English (lit): college student are ?
To ask a more specific question you can include question words. Let's look at a few ways you can use the word なん (nan).
Hiragana: せんこうはなんですか。 What is your major?
Romanji: senkoo wa nan desu ka.
English (lit): major (subj) what is it?
You can get creative with なん by adding endings to ask specific questions.
Hiragana: いまなんじですか。 What time is it now?
Romanji: Ima nanji desu ka
English (lit): Now what time is it?
By adding じ (ji) you make "what" into "what time"
Hiragana: なんさいですか。 How old are (you)?
Romanji: nansai desu ka.
English (lit): What age are?
By adding さい (sai) you make "what" into "what age" or "how old"
Hiragana: なんねんせいですか。 What year student are (you)?
Romanji: nannensee desu ka.
English (lit): what year student are?
By adding ねんせ (nensee) you make "what" into "what year student"
Try it out for yourself! In the comments ask or answer a question. It may help to review previous card on です.
Here are a few question words
なん or なに What