Frequently Asked Questions

PipeCode is a data engineering interview preparation platform. We offer 350+ practice problems (SQL, Python, data modeling), interview-first courses, AI mock interviews, and an ATS-friendly resume builder — all designed around what actually shows up in data engineering interviews at top tech companies.

Yes! PipeCode offers a free tier with access to many practice problems, basic course content, and community discussions. You can upgrade to Premium anytime for unlimited access to all problems, courses, AI interviews, and the resume builder.

Our problems are sourced from real interviews at companies like Amazon, Google, Meta, Netflix, Airbnb, Uber, Microsoft, and many more. Each problem is tagged with the companies where similar questions have appeared.

We support SQL (PostgreSQL dialect), Python, and JavaScript for coding problems. Data modeling problems are solved using our interactive schema designer, and quizzes cover conceptual topics.

Our AI interviewer simulates real behavioral and technical interviews. It asks follow-up questions, evaluates your responses, and provides detailed feedback including scoring across multiple dimensions like communication, technical depth, and problem-solving approach.

Yes, you can cancel anytime. Your Premium access continues until the end of your current billing period. We don't charge any cancellation fees.

We accept all major credit and debit cards through Stripe, including Visa, Mastercard, and American Express. All payments are securely processed.

PipeCode is specifically built for data engineering interviews, not general software engineering. Our problems focus on SQL, data pipelines, data modeling, and ETL — the skills data engineering interviews actually test. We also offer interview-first courses and AI mock interviews tailored to data engineering roles.

Please refer to our refund policy page for details. Generally, we offer refunds within our stated policy period if you're not satisfied with the service.

Simply sign up for a free account and start practicing! No credit card required. You can explore problems, take courses, and try an AI mock interview right away.