Online Aptitude Test – Logical reasoning, quantitative aptitude, and basic SQL queries (around 30 questions, 45 minutes).
Technical Round – Questions on Python, SQL joins, and data cleaning methods. Asked me to write a simple query to fetch top 5 highest salaries from an employee table.
Case Study Round – Given a dataset and asked to find key insights (e.g., identify sales trends and missing data issues).
Interview questions [1]
Question 1
Tell me about a challenge you faced in your studies or previous work, and how you overcame it
I applied online. The process took 2 weeks. I interviewed at Vaisala
Interview
The interview process consisted of two stages: an initial screening call with the manager and an in-person interview at the company’s office.
During the on-site interview, there were two parts. The first part focused on general questions about my technology stack, previous experience, and background. The second part was a whiteboard system design session.
Both stages were well-organized and conducted in a professional manner. Overall, the interview process left a very positive impression.
Interview questions [1]
Question 1
How would you design a real-time monitoring system?
I applied online. I interviewed at Vaisala (Seattle, WA) in Jun 2017
Interview
I interviewed at Vaisala (Seattle, WA) in June 2017. The process took 3 weeks, the first round was a phone screening followed by the onsite interview. The interviews were mostly talking about the resume and the past experience, and also a bit of whiteboarding.
The overall experience was not great as they should give better reasons than "typos in resume" to reject a software engineer applicant after the onsite interview.
Interview questions [1]
Question 1
Basic data structure questions and easy array manuplation.