The Gallup Organization created a feedback system for employers that would identify and measure elements of employee engagement. They conducted discussions and interviews with a huge number of employees in a variety of industries. Then basis of the results of the focus group they created a 12 survey questionnaire to measure employee satisfaction. Engagement surveys are also called employee pulse surveys.
They 12 questions have rating from 1 to 5. (1 being the lowest and 5 is the highest).
Below are the questions of Gallup Survey and the parameter they measure are mentioned alongside.