All the information was collected by the specialists, wasn’t it? Разделительный
Was all the information collected by the specialists? Общий
What was collected by the specialists.? Вопрос к подлежащему
Who was all the information collected by ? Специальный
Was all the information collected by the specialists or by the students? Альтернативный
All the information was collected by the specialists, wasn’t it? Разделительный
Was all the information collected by the specialists? Общий
What was collected by the specialists.? Вопрос к подлежащему
Who was all the information collected by ? Специальный
Was all the information collected by the specialists or by the students? Альтернативный