Data Interview Prep: Python, SQL, and Core Probability Problems โ€” WalkSelf
โฑ 3h ๐Ÿ“š 30 lessons ๐ŸŽง Audio version

Data Interview Prep: Python, SQL, and Core Probability Problems

Master the essential Python and SQL coding challenges and probability theory questions needed to confidently ace your first technical interview for a data role.

  • ๐Ÿ’ฌ AI instructor
    Ask about any lesson and get a clear answer instantly, anytime.
  • ๐Ÿ• Start anytime
    No schedules or deadlines โ€” learn at your own pace, whenever suits you.
  • ๐ŸŒ In English
    Lessons, tasks and certificate โ€” all fully in your language.

About this course

Are you struggling to find structured practice problems to prepare for technical interviews in data analysis or data science? This course delivers a comprehensive set of focused practice problems covering the three pillars of entry-level data interviews: Python programming, advanced SQL querying, and fundamental probability theory. By working through these scenarios, you will build the practical skills and confidence necessary to articulate your solutions clearly and effectively during screening. What you'll learn: * Master fundamental Python syntax and data structures by solving realistic coding challenges. * Apply advanced SQL techniques, including Common Table Expressions (CTEs) and window functions, to extract and manipulate data efficiently. * Understand core concepts of probability and statistical reasoning required to answer theoretical interview questions. * Practice tackling complex, multi-step data problems that combine programming logic and database querying. * Learn how to structure and explain your technical solutions clearly, simulating the interview environment. The course begins with foundational concepts in each domain before progressing to targeted interview-style problems. You will read detailed explanations and step-by-step solutions for every scenario, enabling deep understanding of the underlying logic. This course is designed for absolute beginners and those with minimal experience who are preparing for their first technical interview for a Data Analyst, Business Intelligence, or Junior Data Scientist role. No prior professional experience is required. Start building your interview readiness today.

What you'll get

  • ๐Ÿ“œ Certificate of completion
    Add it to your LinkedIn profile
  • ๐Ÿ’ฌ Personal AI tutor
    Stuck on a lesson? Ask your built-in tutor anything, any time.
  • ๐ŸŽง Audio version included
    Learn on the go โ€” no screen needed
  • โ™พ๏ธ Lifetime access
    Come back anytime, no expiry
  • ๐Ÿ“ฑ Phone or computer
    Works anywhere, any device
  • ๐Ÿ’ธ 14-day refund
    No questions asked
  • โšก Short & focused
    3h of practical content

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Frequently asked

What do I need to take this course? +

Just a phone or computer with internet. No installs, no special hardware.

How do I pay? +

By card via Stripe. We donโ€™t store card details โ€” Stripe handles them securely.

Can I get a refund? +

Yes โ€” full refund within 14 days, no questions asked.

How long will I have access? +

Forever. Once you purchase, the course is yours to revisit anytime.

Will I get a certificate? +

Yes. On completion you'll receive a certificate you can add to your LinkedIn profile.

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