Whether all questions are compulsory depends on the specific context of the assessment or questionnaire you're referring to.

• Exams and Tests: In many exams, especially those with a time limit, all questions are compulsory. Not answering might result in a loss of marks.
• Surveys and Questionnaires: Often, some questions are optional. This is usually indicated clearly with instructions like "optional" or "please answer if applicable".
• Assignments: Depending on the instructions, assignments may require you to answer all questions or provide a choice (e.g., "answer any three out of five questions").

To determine whether all questions are compulsory in your specific case, you should:

• Carefully read the instructions: The instructions usually state explicitly whether all questions must be answered.
• Look for indications of optional questions: Check if any questions are marked as optional.
• Ask the instructor or administrator: If the instructions are unclear, clarify with the relevant authority.