Question: How can you use the promise API with a callback-based function such as child_process.exec?

1. new Promise(child_process.exec())
2. util.promisify(child_process.exec())
3. util.promisify(child_process.exec)
4. new Promise(child_process.exec)

Answer: The correct answer of the above question is Option C:util.promisify(child_process.exec)