A questionnaire is defined as the following:
A commonplace instrument for collecting data beyond the physical
reach of the researcher, that is, from a large or diverse sample of
people. It is an impersonal instrument for collecting information and
must, therefore, contain clear questions, worded as simply as
possible to avoid any confusion or ambiguity since the researcher
probably will not be present to explain what was meant by any one
particular question. The questionnaire should be designed to fulfil a
specific research objective, it should be brief and the sequence of the
questions logical.
A survey is:
A methodology which can use different instruments such as
observation, interview or a written list of questions called a
questionnaire. Surveying is the process of conducting a study from
representative samples of specific populations (for example, women
in the workforce, Year 9 students, recent immigrants). If a
questionnaire is used, it may be comprised entirely of closed
questions, multiple – response questions, Lickett scale questions
(differential sliding scale or rating scale questions) or open-ended
questions, or may be a combination of all question styles. Data
recording sheets for observation or a short list of structured interview
questions are two other instruments that can be used during a
survey.
These definitions are from your syllabus