# Complete the validation by printing f-strings that check code3.isdigit() and code1.isalpha().

Canonical URL: <https://datadriven.io/problems/complete-the-validation-by-printing-f-strings-that-check-cod-1fb21c0f>

Domain: Python · Difficulty: medium

## Problem

Complete the validation by printing f-strings that check code3.isdigit() and code1.isalpha().

## Related

- [All practice problems](https://datadriven.io/problems)
- [Mock interview mode](https://datadriven.io/interview/complete-the-validation-by-printing-f-strings-that-check-cod-1fb21c0f)
- [Python Interview Questions](https://datadriven.io/python-interview-questions)
- [Data Engineering Interview Prep Guide](https://datadriven.io/data-engineer-interview-prep)
- [Daily Challenge](https://datadriven.io/daily)

---

Source: DataDriven (https://datadriven.io). 100% free data engineering interview prep. Live code execution against Postgres 16, Python 3.11, and Spark sandboxes. No paywall, no premium tier, no signup gate.