qobjects = [ { question: "One of these functions can be used to join two or more arrays. Which one?", options: [ "join_array()", "concatenate()", "join()" ], correct: 1 }, { fillintheblanks: "exercise_array_join1.htm" }, { question: "Which NumPy function can be used to join two arrays, stacked along columns?", options: [ "vstack()", "hstack", "dstack()" ], correct: 0 } ]