Curated interview practice questions with answers. These are practice scenarios, not a verified list of past interview questions.
About Microsoft hiring for Power BI roles
Microsoft builds software, cloud and hardware products including Windows, Microsoft 365, Azure, Dynamics, GitHub, LinkedIn and Xbox. The India Development Center in Hyderabad and Bengaluru is one of its largest engineering hubs outside the US. It hires for software engineers, data scientists, data and applied scientists, and engineers working on Azure data and quality.
For Power BI roles, this Microsoft practice set focuses most on Advanced DAX and Time Intelligence (6), Performance Optimisation and Administration (6), Power BI Service, Sharing and Security (5), Data Modelling (3). It has 1 easy, 15 medium, 14 hard questions, so you can start easy and work up to the harder ones.
Company type
Product
Headquarters
Redmond, Washington, USA
Main India offices
Hyderabad, Bengaluru, Noida, Gurugram, Pune
Microsoft Power BI interview process
Online coding assessment
Technical round 1 (DSA)
Technical round 2 (DSA or design)
Hiring manager round
AA (As Appropriate) round
Typical pattern based on public candidate experiences. Rounds vary by role, team and year.
Solved for MicrosoftStart practicing
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01
Users want to analyse sales by both order date and delivery date in the same report. What do you do?
I would keep the Date table related to OrderDate as the active relationship and add an inactive relationship to DeliveryDate. Then create measures like Sales by Delivery Date using USERELATIONSHIP. If users need separate slicers for both dates at the same time, I would create a second Delivery Date table as a role-playing copy related actively to the delivery column.
02
Write a measure that shows the selected slicer value in a title.
Report Title =
VAR r = SELECTEDVALUE('Store'[Region], "All Regions")
VAR y = SELECTEDVALUE('Date'[Fiscal Year], "All Years")
RETURN "Sales for " & r & " - " & y
Use it in a visual title through conditional formatting, Title text, Field value. SELECTEDVALUE returns the fallback text when zero or multiple values are selected.
03
A measure shows the same value on every row of a table visual. Why?
The measure is probably ignoring the filter context of the rows, for example using ALL on that column or table, or the row field comes from a table that is not related to the fact table, so its filter cannot reach the data. I would check relationships in model view, the direction of filtering, and any ALL or REMOVEFILTERS in the measure.
04
A measure works in a card but gives wrong results in a matrix with subtotals. How do you debug it?
I would test the measure at each level of the matrix using a table visual and check how filter context differs at the subtotal. Often logic uses SELECTEDVALUE or MAX, which return blank or misleading results when several values are visible. I would use ISINSCOPE to branch logic or SUMX over the grouping column for additive results, and validate with DAX Studio queries.
05
A DirectQuery report is slow and the database team complains about load. What do you do?
I would check which queries are slow using Performance Analyzer and the database's query logs. Then reduce visuals per page, add Import-mode aggregation tables for common summary views, set dimensions to Dual mode, and apply query reduction options so slicers send queries only on Apply. On the source side, indexes or columnstore tables help. If real-time is not essential, moving to Import with frequent refresh may be simpler.
06
Reports slow down every morning at 9 a.m. on shared capacity. What could be happening?
Morning peaks often combine many users opening reports with heavy scheduled refreshes running at the same time. I would check the Fabric Capacity Metrics app for throttling and identify the heaviest items. Fixes include moving refreshes to off-peak hours, optimising the largest semantic models, spreading workloads across capacities, or scaling the capacity. Communicating refresh windows to teams also helps.
07
How do you create a dynamic axis using field parameters?
Go to Modeling, New parameter, Fields, and add the fields such as Region, Category and Channel. Power BI creates a parameter table and slicer. Put the parameter field on the axis of a chart; users select which dimension to show from the slicer. You can add measures to a separate field parameter so users switch both the measure and the axis.
08
Your measure using IF and many nested CALCULATE calls is slow. How do you optimise it?
I would store repeated sub-expressions in variables so they are computed once, replace nested IF chains with SWITCH(TRUE(), ...), use column filters instead of FILTER over tables, and avoid context transition inside large iterators. I would also check whether some logic can move into a calculated column or Power Query at refresh time. DAX Studio timings confirm whether formula engine time drops.
09
Managers want to see the top 5 products plus an 'Others' row that sums the rest. How do you build it?
I would create a calculated table of product names plus an Others row, related or disconnected, and a measure that ranks products with RANKX over ALL products. For rows ranked 1 to 5 it returns their sales; for Others it returns total sales minus the top 5. TOPN helps compute the top 5 total. The rank should respect slicers like year so the top 5 updates dynamically.
Direct Lake is a storage mode for semantic models on Fabric capacity that reads Delta Parquet files from OneLake straight into the VertiPaq engine on demand. It avoids scheduled import refreshes and the latency of DirectQuery, so reports show fresh data with near-import performance. If a query exceeds capacity guardrails or uses unsupported features, it can fall back to DirectQuery, which is slower.
11
Thirty measures each need YTD, previous year and YoY versions. How do you avoid 120 measures?
I would create a calculation group, such as Time Calculation, with items Current, YTD, PY and YoY % that use SELECTEDMEASURE() wrapped in the time intelligence logic, and set format strings for percent items. Users pick the item from a slicer or matrix columns. This keeps the model small and consistent. I would document it because calculation groups change measure behaviour everywhere.
12
Rewrite a slow measure to use variables and avoid repeated calculation.
Before:
Growth = IF([Sales PY] = 0, BLANK(), ([Total Sales] - [Sales PY]) / [Sales PY])
After:
Growth =
VAR cur = [Total Sales]
VAR py = [Sales PY]
RETURN DIVIDE(cur - py, py)
The previous year measure is now evaluated once instead of three times, and DIVIDE handles zero safely.
13
Users export large amounts of sensitive data from reports to Excel. How do you control it?
I would review whether export is really needed and adjust export settings per report or at tenant level, for example allowing only summarised data. I would apply Purview sensitivity labels so exported files keep protection, use RLS and OLS to limit what can be exported, and monitor exports through the activity log. For legitimate detailed needs, a governed paginated report is better.
14
Scheduled refresh fails every night with a gateway error. How do you troubleshoot?
I would check the refresh history error details, confirm the gateway machine is on and the gateway service is running and updated, and verify data source credentials in the gateway connection have not expired. Then test connectivity from the gateway machine to the source and check that the source names in the model exactly match the gateway data source. Gateway logs and network or firewall changes are next.
15
Business wants year-over-year growth, but the current year is incomplete. How do you compare fairly?
Comparing a partial year with a full last year understates growth. I would limit last year to the same date range, for example using the last date with sales this year and filtering last year's dates up to the matching day, or compare year-to-date to previous year-to-date. I would label the visual clearly as YTD versus same period last year so readers understand it.
Connect DAX Studio to the open Power BI Desktop file, go to Advanced, View Metrics to run VertiPaq Analyzer. It shows size per table and column, cardinality, encoding and relationship sizes. Sort columns by total size to find the biggest consumers, often IDs, timestamps or long text. You can export a vpax file to compare before and after optimisation or share with colleagues.
17
Your source data is 2 billion rows in a cloud warehouse and users need near real-time numbers. Which mode do you choose?
Importing 2 billion rows is heavy and refresh-bound, so I would use DirectQuery or, on Fabric with data in OneLake, Direct Lake. To keep reports fast I would add aggregation tables in Import mode for common summary queries, keep detail in DirectQuery, and use a composite model. I would also make sure the warehouse has good indexing or clustering for the filter columns.
18
How do you set up an app with different audiences?
In the workspace choose Create app or Update app, add the reports and dashboards, then in the Audience tab create audiences such as Sales Managers and Finance, choose which content each audience sees and grant access to the right Entra ID security groups. Publish the app and share the link. Remember RLS still controls rows inside reports; audiences only control which items are visible.
19
How do you use Git integration with a Power BI workspace?
Save the report as a Power BI Project (PBIP), commit the folder to a Git repository in Azure DevOps or GitHub, and connect a Fabric workspace to a branch through Workspace settings, Git integration. Changes can then be committed from the workspace or synced from the repository. Developers work on feature branches and merge through pull requests, giving history, reviews and rollback for reports and models.
20
How do you configure incremental refresh on a sales table?
In Power Query create RangeStart and RangeEnd parameters of type Date/Time, and filter OrderDate so it is greater than or equal to RangeStart and less than RangeEnd. Confirm the step folds to the source. In Desktop right-click the table, choose Incremental refresh, set to archive, say, 5 years and refresh the last 10 days, optionally detect data changes. Publish, and the Service creates partitions on first refresh.
21
Executives want a one-page story of quarterly performance. How do you structure it?
I would start with three to five headline KPIs versus target and last year at the top, then a trend chart showing the quarter's movement, then a breakdown by region or product showing what drove the change, and finally a short text box or smart narrative stating key takeaways and actions. Each element answers the next natural question, and details live on drill-through pages.
22
A YTD measure returns blank for future months on a chart. Users want the line to stop at today. How?
The issue is the opposite for many teams: YTD repeats the last value for future months. I would add a condition so the measure returns BLANK when the period starts after the last date with data, for example IF(MIN('Date'[Date]) > [Last Sales Date], BLANK(), TOTALYTD(...)). Alternatively add a column flagging dates up to today in the date table and filter the visual on it.
23
Your model has one wide flat table with 80 columns from an Excel export. How would you remodel it?
I would identify the grain, such as one row per order line, and split descriptive attributes into dimension tables like Customer, Product, Store and Date using Reference queries and Remove Duplicates on keys. The fact table keeps keys and numeric columns only. Then create one-to-many single-direction relationships. This reduces size, simplifies DAX and makes slicers faster and more reliable.
24
A report must be embedded in a customer-facing web portal for users without Power BI licences. What approach do you take?
I would use Power BI Embedded with the 'embed for your customers' pattern, also called app owns data. The application authenticates with a service principal, generates embed tokens and passes customer identity for RLS, so each customer sees only their data. It needs Fabric or embedded capacity. I would design RLS carefully, test token expiry and monitor capacity load as the customer base grows.
25
Users complain the report page is cluttered with 22 visuals. How do you redesign it?
I would ask which decisions the page supports and keep only visuals that answer those questions. Then group related KPIs into a top row of cards, keep two or three main charts, and move details to drill-through or tooltip pages. Slicers can move into a collapsible panel using bookmarks. Fewer visuals also make the page load faster.
26
A source table has duplicate customer rows with different spellings of the same name. What do you do?
For exact duplicates, Remove Duplicates on the key column. For spelling variations, use fuzzy matching in Merge Queries with a similarity threshold and transformation table, review results, and maintain a mapping table of approved matches. The best long-term fix is to use a stable customer ID from the source system and report data quality issues to the owner rather than cleaning endlessly in Power BI.
27
Your calculated columns have made the model huge. What do you do?
I would move simple row-level logic into Power Query or the source SQL, where it compresses better and can fold, and replace aggregations stored as columns with measures. High-cardinality columns such as concatenated keys or precise timestamps should be removed or split. Then check model size with VertiPaq Analyzer in DAX Studio to confirm which columns used the most memory.
28
Totals look inflated after adding a second fact table. What could be wrong?
Likely a relationship is joining at the wrong grain or creating a many-to-many path, so rows get duplicated in filtering, or a bi-directional relationship is letting one fact filter another unexpectedly. I would check the relationships, keys and cardinality, make filters flow from shared dimensions only, and verify a measure against a known total in the source system using a simple table visual.
29
How do you handle errors in Power Query without failing the whole refresh?
Use Keep Errors on a copy of the query to inspect the bad rows, then fix the cause, such as wrong data types or invalid dates. Replace Errors can substitute a value, and in M try ... otherwise catches errors per value:
= Table.AddColumn(Source, "AmountNum", each try Number.From([Amount]) otherwise null, type nullable number)
Log error rows to a separate query so they can be reviewed rather than silently dropped.
30
A large model's measures are fast in Desktop but slow in the Service. What could explain it?
Desktop runs on a local machine with its own memory and only you as user, while the Service shares capacity with other workloads and users, so throttling or memory pressure may appear. Also check RLS, which adds filters that do not exist in Desktop tests, gateway latency for DirectQuery, and differences in data volume after a full refresh. Testing with View as role and capacity metrics helps pinpoint it.
Tips to crack the Microsoft Power BI interview
Practise DSA on linked lists, trees and graphs, and be ready to write clean, compilable code with edge cases handled.
Learn basic Azure data services such as Azure SQL, Synapse and Data Factory if you are applying for data roles.
Prepare examples showing a growth mindset, which Microsoft highlights as a core part of its culture.
Keep a one-minute story ready for every project on your CV: problem, your part, tools, result.
Practise the hard questions on this page aloud; Microsoft interviewers usually ask follow-ups on your first answer.
Frequently asked questions
How many rounds are there in the Microsoft Power BI interview?
Candidates usually go through 5 stages: Online coding assessment; Technical round 1 (DSA); Technical round 2 (DSA or design); Hiring manager round; AA (As Appropriate) round. The exact rounds change with the role, team, location and your experience, so confirm the process with the recruiter.
Which topics should I prepare for the Microsoft Power BI interview?
This practice set leans on Advanced DAX and Time Intelligence (6), Performance Optimisation and Administration (6), Power BI Service, Sharing and Security (5), Data Modelling (3). Revise those first, then practise explaining one or two of your own projects end to end, because most Microsoft interviewers ask you to walk through real work.
Are these the exact questions asked at Microsoft?
No. These are curated practice questions that match the skills and difficulty usually tested in product interviews like Microsoft's. They are not a leaked or verified list of past questions.
Where does Microsoft hire Power BI professionals in India?
Microsoft has large teams in Hyderabad, Bengaluru, Noida, Gurugram, Pune. Openings and locations change often, so check the Microsoft careers page and filter by city and experience.