How can you prevent users from skipping questions in a survey?

Making questions mandatory is the most effective way to prevent users from skipping questions in a survey. When a question is marked as mandatory, respondents cannot proceed to the next question or submit the survey until they have provided an answer to the mandatory question. This requirement ensures that all necessary data is collected, improving the completeness and reliability of the survey results.

Other options may not effectively prevent skipping. Making questions optional allows users to bypass them at their discretion, while using a timer on questions does not enforce an answer; it only pressures respondents to answer quicker. Limiting the number of survey entries addresses participation but does not directly influence whether users skip questions within a single survey. Therefore, making questions mandatory is the ideal solution to ensure that all questions are answered.