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Poll technique is a kind of strategy in which the whole data is recorded by the sources themselves. 
1. Limited number of inquiries 
2. Simplicity 
3. Avoid estimations 
4. No undesirable inquiries 
Both demonstrates an arrangement of inquiries. Be that as it may, if there should arise an occurrence of a poll the answers are to be recorded by respondents themselves while on account of timetable answers are to be recorded by the enumerator particularly enlisted for the reason.