The leading questions in a sample survey is the purpose of the survey and the expectations of the interviewees.

The population is every data point you intend to generalise the survey results to. The sample frame is those data points that you can pick from for the survey. The sample is which of these data points you actually survey, and the sample size is how many of those data points there are.

For instance, if you have 700 students in a school, and you have access to 300 of them, and decide to give 30 of them a survey, the sample size is 30.

It's not.

Answering "Where can you find a sample customer survey questionnaire for a hotel?"

One can find sample survey questions at your local survey questonaire (refer to your local town office to find more details). One could also look through the Survey Center website to find sample surveys to take.