Interview practice

Business Analyst

5–8 years · Senior — Requirements · SQL · Stakeholder management · Documentation · Excel · Process mapping

ownership Data analysis oversight 1 of 6

Tell me about a time you misinterpreted data and the impact it had.

What a strong answer covers

Names a specific dataset and the analysis conducted; details the misinterpretation and its consequences; explains the steps taken to correct it and communicate the findings; discusses what safeguards were put in place to prevent recurrence; reflects on lessons learned.

The follow-up you would get

How could you have validated your interpretation earlier?

Could you have answered that?

scenario Documentation 2 of 6

You have just completed a requirements gathering session, but the notes from the meeting are incomplete and unclear. What is your immediate course of action?

What a strong answer covers

Reaches out to participants for clarifications on missing points; summarises key takeaways and sends for validation; identifies critical areas needing further detail; schedules follow-up discussions if necessary; documents assumptions made during the session.

The follow-up you would get

Some stakeholders disagree with the documented requirements. How do you address these conflicts while keeping the project on track?

Could you have answered that?

scenario SQL Performance 3 of 6

You notice that a query used in a live dashboard is performing poorly, causing delays in data refresh. What steps do you take initially?

What a strong answer covers

Examines the query execution plan to identify bottlenecks; checks for missing indexes or inefficient joins; runs the query with sample data to replicate the issue; considers caching strategies to improve performance; discusses with the database team for expert input.

The follow-up you would get

The database team suggests a structural change to tables. How do you evaluate the trade-offs of implementing this change?

Could you have answered that?

technical Stakeholder Management 4 of 6

You have multiple stakeholders with differing priorities for a project, and there is a risk of scope creep. How do you manage these stakeholders to ensure project success?

What a strong answer covers

Facilitates a stakeholder alignment meeting to clarify priorities; employs a RACI matrix to define roles and responsibilities; establishes a change control process for managing scope; communicates progress and decisions regularly to all parties.

The follow-up you would get

What if a key stakeholder changes their requirements midway through the project?

Could you have answered that?

technical Process Mapping 5 of 6

You are tasked with mapping a business process that takes an average of 10 days to complete. What techniques do you use to identify bottlenecks and improve efficiency?

What a strong answer covers

Conducts a value stream mapping session with stakeholders; identifies key tasks and their durations; looks for handoff points and delays; analyses the flow for non-value-added activities; suggests automation options for repetitive tasks.

The follow-up you would get

What if the stakeholders resist changes to the existing process?

Could you have answered that?

technical Data Analysis 6 of 6

You have a dataset with missing values and outliers while preparing for a data analysis project. What steps do you take to clean the data?

What a strong answer covers

Analyses the extent and patterns of missing values; decides between imputation methods or exclusion based on data significance; applies statistical techniques to detect and handle outliers; documents the cleaning process for transparency.

The follow-up you would get

What if the imputation significantly alters the data distribution?

Could you have answered that?

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