Every question and expert answer on DataEngPrep is free to read. Plans below unlock the part that actually gets you hired — AI feedback on your answers, mock interviews, and resume review. If you try it in good faith and it doesn’t help — refund within 7 days.
100% free, no account needed: all 1,800+ interview questions with full expert answers, code examples, and study guides. You only pay when you want AI to grade and improve your own answers.
Not ready to commit? Start with 5 free analyses every day
| Feature | Free | Starter | Core | Pro |
|---|---|---|---|---|
| 1,800+ questions & expert answers | Free | Free | Free | Free |
| Study guides & code examples | Free | Free | Free | Free |
| AI analyses of your answer | 5 / day | 5 total | Unlimited | Unlimited |
| FAANG-level rewrite of your answer | Partial | Full | Full | Full |
| AI Mock Interviews | - | - | 100 / day | 100 / day |
| Follow-up questions | - | |||
| Resume Optimizer | - | - | - | |
| Company-specific prep | - | - | - | |
| SQL Playground | - | - | - | |
| Progress Dashboard | Basic | Basic | Full | Full |
| Priority support | - | - | - | |
| Duration | Forever | One-time | Monthly | Monthly |
No. Every one of the 1,800+ interview questions, full expert answers, code examples, and study guides is completely free to read — no payment and no account required. You only pay when you want our AI to grade and rewrite your OWN answers, run mock interviews, or optimize your resume.
The AI tools. Reading a model answer and being able to deliver one under pressure are different skills. Paid plans give you unlimited AI analysis of your own answers (score, gaps, and a FAANG-level rewrite), AI mock interviews with a hire/no-hire verdict, a resume optimizer, and progress tracking. That's the part that actually changes interview outcomes.
Yes! All plans unlock immediately after payment. The AI tools (answer analysis, mock interviews, resume optimizer) become available right away.
We accept UPI, debit/credit cards (Visa, Mastercard, Amex, RuPay), net banking, and wallets via Razorpay. International cards are also supported.
Starter is a one-time purchase that gives you 5 complete AI answer analyses — each with a FAANG-level rewrite of your own answer and follow-up questions — with no monthly billing. Pick it if you only need a handful of full analyses for one upcoming interview and don't want a subscription. If you'll be interviewing for more than a week, Core is better value.
Core gives you unlimited answer analysis and mock interviews. Pro adds the resume optimizer, company-specific interview prep, SQL playground, and priority support.
Yes, you can upgrade or cancel at any time from your billing page. Subscription cancellation takes effect at the end of your billing period.
We offer a conditional 7-day money-back guarantee on Starter, Core, and Pro. To claim a refund you need to (1) request it within 7 days of purchase, (2) have actually used the product at least once during that week (so we know you genuinely tried it), and (3) email info@dataengprep.tech from your registered address. Each customer is eligible for one refund total. The Pro Lifetime plan and one-off Interview Packs are non-refundable. After the 7-day window, monthly/yearly subscriptions can still be cancelled anytime to stop future charges. Full terms: /terms#refunds.
Yes. Pricing automatically switches to INR when you visit from India, and we accept UPI, RuPay, Indian credit/debit cards, net banking, and wallets via Razorpay. You can also use the country toggle to switch currency manually.
Just need quick revision PDFs?
Browse Interview Packs