BI developer interview questions: 24 to prepare for
Each question says why it is likely to come up, from what today’s 155 open BI developer postings ask for, and what a good answer shows. Prepare a real example for each, then practise it with the interview answer builder.
Updated Nov 15, 2026, from that day’s open postings.
Practise out loudThe page reads each question aloud and checks your answer. This site keeps nothing.
- Questions to prepare
- 24
- Open BI developer jobs today
- 155
- Postings read in full
- 23
- Median advertised pay
- $149K
Questions about the skills BI developer postings name
Walk me through a recent project where you used SQL. What did you do yourself?
63% of today’s 155 open BI developer postings name SQL.
A good answer shows: Your own hands-on part, the choices you made and a number for the result.
Sample answer: “In my last role I found a pricing error with a check in SQL that had cost about $18K a month; it was fixed within the week. I did that part myself: I chose how to do it, checked the result and explained it to the team.” Then say what you would do differently.
What is a mistake people often make with Tableau, and how do you avoid it?
43% of today’s 155 open BI developer postings name Tableau.
A good answer shows: That you have used it long enough to know where it goes wrong.
Sample answer: “In my last role I built a revenue dashboard in Tableau used by 40 people each week; monthly reporting went from 3 days to 4 hours. I did that part myself: I chose how to do it, checked the result and explained it to the team.” Then say what you would do differently.
How would you explain Snowflake to someone who has never used it?
25% of today’s 155 open BI developer postings name Snowflake.
A good answer shows: That you understand it well enough to make it simple.
Sample answer: “In my last role I built a revenue dashboard in Tableau used by 40 people each week; monthly reporting went from 3 days to 4 hours. I did that part myself: I chose how to do it, checked the result and explained it to the team.” Then say what you would do differently.
Tell me about a problem with Looker that took you a long time to solve.
19% of today’s 155 open BI developer postings name Looker.
A good answer shows: How you narrowed the problem down, and what you would do faster next time.
Sample answer: “In my last role I built a revenue dashboard in Tableau used by 40 people each week; monthly reporting went from 3 days to 4 hours. I did that part myself: I chose how to do it, checked the result and explained it to the team.” Then say what you would do differently.
Technical BI developer interview questions and answers
Which clause keeps only the rows that meet a condition before any grouping happens?
A SQL question (63% of today’s postings name SQL). More in the SQL skill test.
Answer: WHERE. WHERE filters rows first. HAVING filters groups after GROUP BY.
What does an INNER JOIN between customers and orders return?
A SQL question (63% of today’s postings name SQL). More in the SQL skill test.
Answer: Only customers that have at least one matching order. An inner join keeps pairs that match on both sides. A LEFT JOIN is the one that keeps customers without orders.
You need the number of orders for each customer. Which query does it?
A SQL question (63% of today’s postings name SQL). More in the SQL skill test.
Answer: SELECT customer_id, COUNT(*) FROM orders GROUP BY customer_id. GROUP BY makes one row per customer, and COUNT(*) counts the rows inside each group.
What is the result of comparing a value with NULL using = (for example, price = NULL)?
A SQL question (63% of today’s postings name SQL). More in the SQL skill test.
Answer: Unknown, so the row is never returned. NULL means “no known value”. Any comparison with = gives unknown. Write IS NULL to find empty values.
What does len([4, 8, 15]) return?
A Python question (45% of today’s postings name Python). More in the Python skill test.
Answer: 3. len counts the items in a list: there are three.
Which of these is a dictionary?
A Python question (45% of today’s postings name Python). More in the Python skill test.
Answer: {"a": 1, "b": 2}. A dictionary stores pairs of a key and a value, written with curly brackets and colons. {1, 2, 3} is a set.
What is the difference between a list and a tuple?
A Python question (45% of today’s postings name Python). More in the Python skill test.
Answer: A list can be changed after it is made, a tuple cannot. Lists are mutable (changeable); tuples are immutable.
What does this print? for i in range(3): print(i)
A Python question (45% of today’s postings name Python). More in the Python skill test.
Answer: 0 1 2. range(3) counts from 0 up to, but not including, 3.
Questions about how you work
Which numbers did you watch in your last job, and what did you change because of one?
57% of today’s 23 open BI developer postings with a full description mention KPIs or metrics.
A good answer shows: One number, the change you made because of it and the effect.
Tell me about a time you had to win over people outside your team who disagreed with you.
52% of today’s 23 open BI developer postings with a full description mention stakeholders.
A good answer shows: Who they were, what each side wanted, what you did to reach agreement and how it ended.
Tell me about something you owned from the first idea to the result.
43% of today’s 23 open BI developer postings with a full description ask for ownership or end-to-end work.
A good answer shows: That you saw it through when it got hard, with a number for the result.
Have you helped someone else get better at their work? What did you do?
35% of today’s 23 open BI developer postings with a full description mention mentoring.
A good answer shows: A specific person and skill, how you taught it and how they did afterwards.
Tell me about a presentation you gave. What changed because of it?
30% of today’s 23 open BI developer postings with a full description ask for presenting.
A good answer shows: Who the audience was, how you made it simple and the decision that followed.
Which AI tools do you use in your work, and where do you not trust them?
30% of today’s 23 open BI developer postings with a full description mention AI tools.
A good answer shows: Real, specific use, and that you check what the tool produces.
Questions almost every interview has
Tell me about yourself.
Almost every interview opens with it.
A good answer shows: Under a minute: your current work as a BI developer, one result with a number and why this job is the next step. Not your whole resume.
Why do you want to work here?
It tests whether you read about the company.
A good answer shows: Something specific: a product, a goal from the posting or a problem you can help with.
Why are you leaving your current job?
It checks for problems you might bring along.
A good answer shows: What you are moving towards, said briefly, with no criticism of your employer.
What are your salary expectations?
Only 43% of today’s BI developer postings state pay, so be ready to name a figure.
A good answer shows: A range you can defend. Today’s 63 BI developer postings that state a yearly US-dollar range advertise a median of $149K; the middle half $106K to $210K. Ask for their range first if you can.
What is one of your weaknesses?
A classic, still asked.
A good answer shows: A real weakness that does not block this job, and what you do about it.
Do you have any questions for us?
The last question of almost every interview.
A good answer shows: Two or three questions you prepared; the list below has some.
Questions to ask them
- What would make someone in this role successful in the first six months?
- It shows you think about results, and the answer tells you what the job really is.
- Why is this role open?
- A new role, growth or someone leaving: each tells you something different.
- What is the pay range for this role?
- Only 43% of today’s BI developer postings state one; asking is normal.
- How will my work be measured, and how often will we review it?
- You learn what matters to your manager before you start.
- What are the next steps, and when will you decide?
- You know when to follow up, and you can plan around other offers.
Questions about a BI developer interview
- What questions are asked in a BI developer interview?
- Questions about the skills the postings name (SQL, Tableau, Snowflake), about how you work (kpis and metrics, stakeholders, end-to-end ownership) and the questions almost every interview has, such as “Tell me about yourself” and your salary expectations.
- How should I answer BI developer interview questions?
- With a real example: the situation, what you had to do, what you did yourself and the result, with a number. This is the STAR method; aim for 60 to 90 seconds an answer.
- How do I prepare for a BI developer interview?
- Prepare three real stories with a number each (a result, a problem you solved, work with other people), practise them out loud for 60 to 90 seconds, and revise the skills the postings name most: SQL, Tableau, Snowflake. Read the posting again the day before: the duties it lists are what they will ask about.
- Is a BI developer interview hard?
- It depends on the level: today’s BI developer postings ask for 3 years of experience at the median. Most interviews mix questions about the skills in the posting with questions about how you work; the technical part is easier with a real example ready for each skill.
- What salary should I ask for as a BI developer?
- Today’s 63 BI developer postings that state a yearly US-dollar range advertise a median of $149K. Adjust for your experience and the country, and ask for their range first.
Prepare with
Interview answer builder
Turn an example into a 60 to 90 second answer, with checks for a number and for “I”.
The BI developer resume example
The results interviewers ask about, written as resume lines.
Thank-you email
Send it on the day of the interview, written from four fields.
155 open BI developer jobs
Read from employers’ own careers pages every hour.
Everything about BI developer work
Counted from the open postings on Nov 15, 2026, read from employers’ own careers pages and recounted on every update. The questions are ours; no employer’s interview is copied here.