0What is Jack would only be asked in a few contexts. It would be asking for some information that could be answered with 'Jack is a ....'.02br 02br 00For example: 02br 02br 00Peter is a dentist. What is Jack? Jack is a doctor.02br 02br 00I'm a sargeant. What is Jack? Jack is only a corporal.02br 02br 00Who is Jack is
0What is a jack? One word, several meanings02br 02br 00a piece of equipment which can be opened slowly under a heavy object such as a car in order to raise it off the ground: 02br 02br 00from Cambridge Dictionaries - online 02br 02br 02br 00You need a car jack in order to change a wheel.02br 02br 00One wor