Est-ce que tu parles français ?
English: Do you speak French?
In French, closed questions (les questions fermées) are questions that can be answered with 'yes' or 'no'. Open questions (les questions ouvertes) ask for more information and cannot be answered with just 'yes' or 'no'.
Use closed questions when you want a simple 'yes' or 'no' answer. Use open questions when you want more details, such as a place, a reason, or an explanation.
Est-ce que tu parles français ?
English: Do you speak French?
Tu aimes le chocolat ?
English: Do you like chocolate?
Où vas-tu ?
English: Where are you going?
Pourquoi étudies-tu le français ?
English: Why are you studying French?
Comment s’appelle ton frère ?
English: What is your brother's name?