Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Generate four questions that can be asked to test the applicant's knowledge in mathematics.

### Response:
1. What is the Pythagorean theorem used for?
2. What is the difference between the derivative and integral of a function?
3. How does the mean of a data set compare to the median?
4. List examples of logarithmic functions.