Top 10 Power BI Interview Questions (Scenario Based) | Asked in Interviews 2024

Summary

This video script focuses on the top ten scenario-based Power BI interview questions for experienced professionals, aiming to assess their problem-solving skills in real-world situations. It offers insights into handling performance optimization, integrating various data sources, implementing dynamic row-level security, and debugging data issues. The speaker also discusses advanced topics like data flows, DAX best practices, and even exploring the internal structure of a .pbix file for customization. Additionally, resources such as interview guides and PL 300 materials are provided for further learning.

Takeaways

• 📘 The video focuses on top ten scenario-based Power BI interview questions, especially for experienced professionals aiming for lead roles.
• 🎯 Interviewers often present scenarios to assess candidates' experience and problem-solving skills in Power BI, rather than asking straightforward questions.
• 📚 Supplementary materials including interview questions and answers, and a PL 300 guide are provided in the video description for further study.
• 🚫 Due to time constraints, not every question will be explained in-depth in the video, but viewers can request more information in the comments for specific questions.
• 💡 The presenter offers to create a deck or presentation for scenario-based questions if viewers express interest in the comments.
• 🛠 The script emphasizes that there are no right or wrong answers to the interview questions; responses should be based on personal experience and real-world examples.
• 🔍 The first question discusses optimizing Power BI reports for performance and efficiency, suggesting the use of data flows, selecting necessary columns, and following best practices.
• 🔗 The third question highlights the importance of integrating Power BI with various data sources and manually creating relationships when Power BI doesn't automatically do so.
• 🔒 The script touches on row-level security, emphasizing dynamic row-level security as a key topic for interviews, especially for experienced candidates.
• 🤔 Debugging issues with wrong data in Power BI reports is addressed, with advice to check data sources, relationships, and utilize tools like SQL queries for troubleshooting.
• 🔄 The importance of using data flows to manage multiple reports accessing common tables is discussed to reduce live connections and improve refresh efficiency.
• 👥 The final part of the script covers questions about leading a BI team, ensuring team members write efficient DAX, and handling migrations from traditional BI tools to Power BI and Azure ETL pipelines.
• 📈 The video concludes with a question about creating near real-time reports in Power BI, suggesting techniques like push datasets, streaming datasets, and direct query as potential solutions.

Q & A

What is the focus of the video on top ten scenario-based questions for Power BI interviews?

The video focuses on scenario-based questions that are typically asked during interviews for experienced professionals in Power BI roles, such as lead Power BI analytics or lead Power BI engineer positions.

Why are scenario-based questions important in Power BI interviews?

Scenario-based questions are important because they assess a candidate's experience and ability to tackle real-world problems, rather than just their knowledge of specific features or concepts.

What resources are provided along with the video to help with Power BI interviews?

Along with the video, a list of multiple documents with various interview questions and answers, as well as a PL 300 guide, are provided to assist with interview preparation.

Why might the video creator not go into depth for every question in the video?

The video creator may not go into depth for every question to keep the video length manageable and avoid exceeding one hour, which is the preferred duration.

How can viewers get more information on specific questions if they need it?

Viewers can leave a comment in the comment section requesting more information on a specific question, and the creator will consider making a separate video for that topic.

What is the first scenario-based question discussed in the video?

The first scenario-based question is about describing a situation where the candidate had to optimize a Power BI report for performance and efficiency.

What are some strategies mentioned for optimizing a Power BI report's performance?

Strategies include using live connections with common tables, setting up data flows, taking only selected columns, restricting the number of visuals, and writing proper DAX functions.

How does the video address the integration of Power BI with various data sources?

The video discusses manually creating relationships between different data sources when Power BI does not automatically do so, and handling the refresh of these sources simultaneously.

What is the importance of dynamic row-level security in Power BI interviews?

Dynamic row-level security is important as it allows for more granular control over data access based on user attributes, and it is a common topic in interviews for advanced Power BI roles.

How should interviewees handle questions on debugging issues with Power BI reports?

Interviewees should draw from their own experiences, explaining step-by-step how they would troubleshoot and resolve issues, such as checking scheduled refresh statuses, data source integrity, and relationships.

What is the significance of the question about unzipping a .pbix file in Power BI interviews?

The question about unzipping a .pbix file tests a candidate's knowledge of Power BI's underlying structure and their ability to perform advanced customization and troubleshooting.

How can Power BI reports be optimized for near real-time data updates?

Optimization for near real-time updates can be achieved using push datasets, streaming datasets, or direct query, depending on the specific requirements and data volume.

What guidance does the video offer for BI team leaders on ensuring team members write effective DAX?

The video suggests guiding team members on structuring DAX layouts, using DAX Studio for formatting, and leveraging tools like chat GPT for assistance, along with regular knowledge transfer and review sessions.