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PhonePe Business Analytics Interview Questions & Answers

Curated interview practice questions with answers. These are practice scenarios, not a verified list of past interview questions.

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01

What are wireframes and why are they useful for a BA?

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Low-fidelity layouts of screens that help stakeholders visualise and agree on requirements before development starts.
02

How do you handle changing requirements?

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Log the change, assess impact on scope, cost and timeline, get approval through change control or backlog grooming, and update documents and stakeholders.
03

XLOOKUP vs VLOOKUP?

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XLOOKUP can look left or right, uses exact match by default, returns a custom value if nothing is found and doesn't break when columns move. VLOOKUP only looks right and needs a column number.
04

What is a product backlog vs a sprint backlog?

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The product backlog is the ordered list of all desired work; the sprint backlog is the subset the team commits to in the current sprint.
05

What is a feasibility study?

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An early assessment of whether a proposed solution is technically, economically, operationally and legally viable before committing budget.
06

What is a process flow and which tools do you use?

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A diagram of steps, decisions and owners in a process, made using BPMN or flowcharts in tools like Visio, Lucidchart or draw.io.
07

What is Power Pivot?

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An Excel add-in for building data models with relationships and DAX measures over millions of rows, beyond normal worksheet limits.
08

How would you improve a company's low app conversion rate?

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Map the funnel, find the biggest drop-off, check usability and load time, run A/B tests on fixes and track conversion lift.
09

How would you build a simple financial model in Excel?

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Separate inputs, calculations and outputs, link all formulas to input cells, add scenarios and checks, and avoid hard-coded numbers inside formulas.
10

What is SQL and why do business analysts need it?

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A language for querying databases. BAs use it to pull data themselves, validate numbers, check reports and answer questions without waiting for engineers.
11

What is gap analysis?

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Compare the current state (as-is) with the desired state (to-be), list the gaps in process, people or technology, and plan actions to close them.
12

How do you evaluate a marketing campaign's ROI?

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ROI = (incremental profit - campaign cost) / campaign cost. Measure incremental sales using a control group or before-after comparison.
13

How do you calculate monthly revenue growth in SQL?

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Aggregate revenue per month and use LAG(revenue) OVER (ORDER BY month) to compute (revenue - previous) / previous.
14

Guesstimate: how many cars are sold in India every year?

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Structure it: households × car-owning share ÷ replacement cycle + first-time buyers + commercial fleet. State each assumption clearly and sanity-check the final number.
15

How do you validate that a report's numbers are correct?

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Reconcile totals with source tables using SQL, check filters and joins for duplication, compare with prior periods and verify with business owners.
16

Tell me about a time you handled a difficult stakeholder.

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Use STAR: Situation, Task, Action, Result. Show that you listened, found the underlying goal, used data to align people and reached a documented decision.
17

Explain Porter's Five Forces.

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A model assessing industry attractiveness through supplier power, buyer power, threat of new entrants, threat of substitutes and rivalry among competitors.
18

How do you compute CAGR in Excel?

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CAGR = (End value / Start value)^(1/years) - 1, entered as =(B2/A2)^(1/n)-1.
19

What is the difference between COUNT(*) and COUNT(column)?

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COUNT(*) counts all rows; COUNT(column) counts only rows where that column is not NULL.
20

SQL: total revenue per month.

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SELECT DATE_TRUNC('month', order_date) AS month, SUM(amount) AS revenue FROM orders GROUP BY 1 ORDER BY 1; -- MySQL: DATE_FORMAT(order_date, '%Y-%m')
21

What is a SWOT analysis?

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A framework listing internal Strengths and Weaknesses and external Opportunities and Threats to assess a project or business position.
22

How would you decide whether to launch a new product?

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Assess market size and demand, customer need, competition, unit economics, capabilities, risks and strategic fit, then test with a pilot before scale-up.
23

What does a Business Analyst do?

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A BA bridges business and technology: gathers requirements, analyses data and processes, documents BRD/FRD and makes sure the final solution actually solves the business problem.
24

What is the profit equation and how do you use it in cases?

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Profit = Revenue minus Cost, where revenue = price x volume and cost = fixed + variable. Split each part to find which one explains a change.
25

What is a CTE?

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A named temporary result introduced with WITH that makes long queries readable and reusable in the same statement.
26

What is a traceability matrix?

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A table linking each requirement to design, test cases and delivery status, ensuring nothing is missed and helping assess change impact.
27

How do you chart a trend with a target line?

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Create a line or column chart of actuals and add the target as another series formatted as a line.
28

Which Excel functions do business analysts use daily?

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VLOOKUP or XLOOKUP, INDEX-MATCH, SUMIFS, COUNTIFS, IF, text functions, PivotTables and charts.
29

How do you handle NULL values when calculating averages?

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AVG ignores NULLs; use COALESCE(col, 0) if NULLs should count as zero, depending on the business meaning.
30

Do a quick SWOT analysis for an ed-tech company.

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Strengths and Weaknesses are internal; Opportunities and Threats are external. Example: S = strong faculty, W = low brand awareness, O = AI upskilling demand, T = free online content.
31

How do you analyse variance between budget and actual?

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Variance = Actual - Budget, shown as amount and percentage, with conditional formatting to flag large gaps and comments on the drivers.
32

What are functional and non-functional requirements?

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Functional requirements describe what the system does (login, reports); non-functional ones describe how well it does it (speed, security, availability, usability).
33

How do you estimate the annual revenue of a coffee shop chain?

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Number of outlets x daily customers x average bill x operating days, then validate using footfall, peak hours and similar chains.
34

What is the 80/20 rule in business analysis?

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Pareto principle: about 80% of outcomes come from 20% of causes, such as most revenue from a few customers or most defects from a few issues.
35

Agile vs Waterfall?

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Waterfall runs fixed phases one after another with requirements frozen early. Agile delivers in short sprints with continuous feedback, so requirements can change. In Agile, BAs maintain the backlog and user stories.
36

How do you create a dashboard in Excel?

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Prepare clean data, build PivotTables and PivotCharts, add KPI cards and slicers, and arrange everything on one sheet with a clear layout.
37

What is the role of a BA in Scrum?

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They help the Product Owner refine the backlog, write stories and acceptance criteria, clarify details with developers and support testing and demos.
38

How do you manage conflicting requirements from two senior stakeholders?

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Clarify the underlying goals, present data and trade-offs, facilitate a joint session, escalate to the sponsor if needed and document the agreed decision.
39

How do you handle large datasets in Excel?

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Use tables, Power Query, remove volatile functions, filter before calculating and move to Power Pivot or a database when rows reach the millions.
40

Use case vs user story?

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A use case describes the full interaction between an actor and the system (main and alternate flows). A user story is a short statement of need from the user's point of view, refined with acceptance criteria.
41

Guesstimate: how many pizzas are sold in Mumbai on a weekend?

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About 20 million people, roughly 10% order pizza on a weekend, about 1 pizza per 2 people in an order. This gives roughly 1 million pizzas, adjusted for outlets and delivery capacity.
42

How do you find duplicate customers?

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SELECT email, COUNT(*) FROM customers GROUP BY email HAVING COUNT(*) > 1;
43

Build a break-even analysis in Excel.

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Break-even units = Fixed costs ÷ (Price − Variable cost per unit). Add a data table to test different price and volume scenarios.
44

What are acceptance criteria?

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Clear, testable conditions a story must meet to be accepted, often written as Given-When-Then scenarios.
45

Difference between INNER JOIN and LEFT JOIN?

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INNER returns only matching rows; LEFT returns all rows from the left table and NULLs where there is no match.
46

SQL: top 5 customers by spend.

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SELECT customer_id, SUM(amount) AS spend FROM orders GROUP BY customer_id ORDER BY spend DESC LIMIT 5;
47

What is the use of the IFERROR function?

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It returns a custom value when a formula errors out, keeping reports clean, for example =IFERROR(VLOOKUP(...), "Not found").
48

How do you validate data before analysis?

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Check row counts against the source, nulls, duplicates on keys, value ranges, date coverage and that totals reconcile with finance reports.
49

KPI vs metric?

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Every KPI is a metric, but a KPI is tied directly to a strategic goal (e.g. monthly churn). A metric can be any measurement (e.g. page views).
50

Write a user story with acceptance criteria for password reset.

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As a customer, I want to reset my password by email so that I can get back into my account. Acceptance criteria: • Reset link expires in 15 minutes • Password rules are shown while typing • A success message appears after reset
51

What is a stakeholder analysis?

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Identifying everyone affected by the project and mapping their influence and interest to decide how to communicate with and involve each group.
52

What is a KPI tree?

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It breaks a top metric into drivers: Revenue = Users × Conversion × AOV; Users = New + Returning, and so on. It shows which lever to pull and where a drop came from.
53

What is a BRD review and who signs it off?

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Stakeholders and the sponsor review the Business Requirements Document for completeness and accuracy, and the business owner gives formal sign-off before design begins.
54

How do you write a query to find users active in consecutive months?

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Get distinct user-month pairs, self-join or use LAG on month per user, and keep rows where the previous month is exactly one month earlier.
55

Revenue grew but profit fell. Why could that happen?

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Look at the cost side: heavier discounts, higher CAC, logistics costs, product mix shifting to low-margin items, one-time expenses or pricing changes. Break contribution margin down by segment.
56

What is root cause analysis and which techniques do you know?

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Finding the underlying reason for a problem using the 5 Whys, fishbone diagrams or Pareto analysis, then fixing the cause not the symptom.