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Behavioral
3 years ago
Can you tell me about how you see your career developing over the next five years? How does Roku fit into this plan?
Data Scientist

Roku

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3 years ago
Statistics
3 years ago
If two predictors are highly correlated, what is the effect on the coefficients in the logistic regression? What are the confidence intervals of the coefficients?
Data Scientist

Roku

Zomato

Palo Alto Networks

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3 years ago
Behavioral
3 years ago
Tell me about your most impressive project.
Data ScientistTechnical Program ManagerSoftware EngineerProduct Manager

Roku

Electronic Arts Logo

Electronic Arts

Dropbox Logo

Dropbox

+1

I look after our email platform and our existing solution wasn't flexible enough to handle targeted messages at scale. We were missing an opportunity with users to send personalised messages at the right time to help increase engagement. I embarked on a project to implement a new marketing automation software. This project required alignment across our product, data, retail, security and legal teams. I spent time researching the availble tools in the marketing and workshopping requirements with relevant stakeholders, we created an RFP and sent to a number of suppliers. Each round of the RFP I assigned a score to the company and gathered feedback from stakeholders. This ensured the decision making process was fair and we had strong evidence when sharing the business case to senior leadership.

Once we decided on the supplier, I was responsible for implementing the tool which required support across various teams within the business. Implementing something cross-functionally

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3 years ago
Behavioral
3 years ago
Whenever a scheduled meeting takes place, a coworker constantly shows up late. What would you do in this case?
Data ScientistProduct ManagerBackend EngineerTechnical Program Manager

Roku

MPL Logo

MPL

Commvault Logo

Commvault

+11

Have a curious mind and approach with understanding. Talk to the person 1x1, see what's up and go from there.

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3 years ago
Behavioral
3 years ago
Tell me about an occasion when you disagreed with your boss.
Data ScientistData Engineering ManagerEngineering ManagerUX Designer

Roku

Pepperfry Logo

Pepperfry

Huawei Logo

Huawei

In my last role I had to make a UX decision about the product that will balance functionality for the user without compromising performance. After testing a few options and validating it with internal stakeholders I released the updated UX, but then the CEO (who was a heavy user of the product) was against that change. I saw down with him and explained my reasoning and the process that I took to validate the solution, and gave him the option to try it himself on an early version. Once he saw the big picture he agreed that my solution was the right approach, but asked that next time I will consult with him before releasing changes like this. 

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3 years ago
Behavioral
3 years ago
Please share a time when you disagreed with a member of your team.
Data ScientistTechnical Program ManagerSoftware EngineerProduct Manager

Roku

Lenskart Logo

Lenskart

Takeaway Logo

Takeaway

I try to understand their point of view and be open to new ideas. If I listen without being defensive I know  the other party will also listen. That way we can take the best idea from both and come up with great solution.

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3 years ago
Behavioral
4 years ago
The most memorable challenge you've faced in the past?
Data ScientistEngineering ManagerUX DesignerUX Researcher

Roku

Rivigo Logo

Rivigo

Panasonic Logo

Panasonic

+6

It would be at my thesis, of predicting SEPSIS with AI using multiple models, and the challenge was with time management, since we had 2 problems, the first problem was that we didn't had access to the data base until half of the second semester, since the process to get access to a hospital database was a rigorous process, so we weren't able to go quick with our application. The second one was that a team mate and I had a family member with cancer, so we needed to manage our work load in a manner that we could be present as family and team members, we needed to fulfil our duties on the project, so I planted a prioritization process in witch we focused on our best attributes I on sql queries and documentation, mostly but the situation with the family member of my companion worsen, so needed someone to help with his work load, so I also assisted him with his main tasks as the main designer of the project, mainly on the uml diagrams, so that we could end our thesis 

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4 years ago
ML Knowledge
4 years ago
What do the values of the coefficients represent in a logistic regression equation?
Data Scientist

Roku

Chegg Logo

Chegg

BetterUp Logo

BetterUp

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4 years ago
ML Knowledge
4 years ago
How would you define k-means clustering and its likelihood of achieving a global optimum? Proceed to implement it for an N*D matrix data set.
Data Scientist

Roku

Chime Logo

Chime

Convoy Logo

Convoy

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4 years ago
Behavioral
4 years ago
Can you tell me about the last time you had a disagreement with your boss or an executive
Data ScientistData Science ManagerML Engineering ManagerEngineering Manager

Roku

Corning Logo

Corning

DrChrono Logo

DrChrono

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4 years ago

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Data Scientist

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Statistical
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Roku

Data Scientist

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Metrics and Experimentation
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Roku

Data Scientist

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ML / Modeling
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Roku

Data Scientist

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Problem Solving
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Roku

Data Scientist

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SQL
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Roku

Data Scientist

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Resume Review
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Roku

Data Scientist

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Behavioral

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*All interview questions are submitted by recent Roku Data Scientist candidates, labelled and categorized by Prepfully, and then published after being verified by Data Scientists at Roku.

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