AI interview practice for data science, compared
We make MockLive AI, one of the tools below. Every fact about the others comes from their own websites, checked on 23 October 2026. Several sites showed us Indian prices; check theirs in your country.
The short answer
- SQL and Python under time pressure: StrataScratch's AI coding sessions or DataInterview's company-specific rounds.
- A spoken data science interview with follow-ups: ProjectPro (about 40 minutes, data scientist, data engineer and ML engineer) or MockLive AI.
- Free practice every day: 365 Data Science's InterviewACE.
- A big question bank with company guides: Interview Query ($79 a month, $199 a year or $299 lifetime).
- Data scientist, data analyst, data engineer and ML engineer interviews out loud, with behavioural, case, technical and live coding rounds, on one-time passes: MockLive AI, first 7 minutes free.
How they compare
| Tool | Spoken, with follow-ups? | Roles | What's free | Paid |
|---|---|---|---|---|
| MockLive AI (ours) | Yes: spoken, follows up on your answer | Data scientist, analyst, engineer, ML and AI engineer, plus 40+ other roles | First 7-minute interview, no card | One-time: $9 for 3 · $39 for 15 · $79 for 40 |
| ProjectPro AI Mock Interview | Yes: fully voice, 5–7 questions with follow-ups, ~40 min | Data scientist, data engineer, ML engineer | A free mock, no card | Plans with 3 to 15 AI mocks; India pricing shown, USD not confirmed |
| Interview Query | Chat beside a code editor; voice not mentioned | Data science, analytics, ML | Not shown | $79/mo · $199/yr · $299 lifetime |
| DataInterview | AI interviewer with a rubric score; voice not stated | Data, ML, quant; company-specific rounds | Question bank samples | AI mocks from $57/mo or $360/yr |
| StrataScratch | No: AI-reviewed coding sessions | SQL, Python, R | 75+ questions; no AI mocks | From $24/mo or $139/yr; $289 lifetime |
| 365 Data Science InterviewACE | Typing or speech-to-text; follow-ups not stated | 10 data roles | Free sessions (the site says two a day) | Self-study from $29/mo |
| Prepfully AI Interviewer | Live AI mock; follow-ups not stated | Data scientist, data engineer, ML engineer | 1 free mock | $49 for 5 · $99 for 15 · $199 for 40 (15-min), one-time |
Checked 23 October 2026. Prices change, so check each tool's site before you buy. MockLive AI is independent and not affiliated with any company named here.
When each one is the right choice
Your weak spot is SQL or Python speed
StrataScratch or DataInterview. Coding drills beat conversation practice for that.
Your weak spot is explaining
A spoken interviewer: ProjectPro or MockLive AI. Product sense, experiment design and case rounds are judged on how you reason aloud.
No budget
365 Data Science's daily free sessions, plus one free spoken mock from ProjectPro, Prepfully or MockLive AI.
Common questions
What do data science interviews test?
Usually SQL or Python coding, statistics and experiment design, product or business sense, and behavioural questions. The mix varies by company and level.
Is there an AI that does a spoken data science mock interview?
Yes. ProjectPro runs a fully spoken one for data scientist, data engineer and ML engineer roles; MockLive AI runs spoken interviews for data roles alongside 40+ others.
Related: Data scientist mock interview · Data analyst mock interview · AI coding interview practice compared
One interview tells you more than this table
Your first interview is free and needs no card. Pick the role and the round, answer out loud, and get a rubric score with every answer replayable.