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      Entrevista para Data Scientist

      1 de set. de 2022
      Candidato(a) sigiloso(a) à entrevista
      Roterdão
      Nenhuma oferta
      Experiência negativa
      Entrevista com nível médio de dificuldade

      Candidatura

      Candidatei-me online. Fui entrevistado pela Nielsen (Roterdão) em ago. de 2022

      Entrevista

      -----------SUMMARY (Then I will write the details + Most of the questions)----------- Stay away from Nielsen! The Recruiter and the Hiring Manager were extremely unprofessional. If they invite you for an interview, say "No, thank you". -----------DETAILS----------- ***1) Online Application: The job description was prepared unguardedly already. For example, the same sentence was divided into multiple bullet points; and this mistake occurred many times. ***2) Invitation - Recruiter Interview: When I received the invitation, I was shocked since the title and location info were not included in the position. I need this since I applied for 3 different positions... When I asked the Recruiter, she sent me a "1-word e-mail" that only says the title; no location still. ***3) Interview - Recruiter: The interview was at 16:00, but she was not in the interview room. At 16:05, I sent a "Will you join?" message by e-mail. She came at 16:08 finally! She asked about my salary expectations. I said this: “Since I am 30 years old, the salary threshold for the work-visa is 4,840 euro gross”. She said that it should be fine. She tried to tell me the steps, but she was unsure. She told me that the next step is the "Hiring Manager interview" and then there will be Technical Interviews She was considering me for one of the other positions as well. Therefore, at the end of the interview, she told me that she wants to forward me to those Hiring Managers. ***4) Invitation – Hiring Manager Interview: I received an e-mail that does not include the job title, again…I asked the Recruiter since I was interviewing for 2 roles at the same time. She did not respond at all. By the way, this Recruiter has 15 years of experience… ***5) Interview - Hiring Manager: He came 6 minutes late as well, like the Recruiter! His accent was very hard to understand. Therefore, I had to ask him to repeat again constantly. Then, I wondered how I can work together with him. I cannot even understand how these people get these higher-level positions with this; maybe through strong personal connections… He connected to the interview with his mobile phone! He was sitting on the ground and he was wearing an unironed T-shirt. Since he could not hold his mobile phone for a long time, we even had times when I could not see his face. This is too disrespectful! ***6) Invitation – BUT FOR WHAT?: I received an invitation e-mail again that does not include any information. It could be the “3rd interview” or the “1st interview for the other position”. I tried to ask to the Recruiter again, but she did not respond. 1 week later, the interview date came. 30 minutes before the starting time, the previous Hiring Manager sent me an e-mail like this: “Sorry, I already interviewed with you. The Recruiter scheduled the same interview for us again”. Then the interview is canceled. These people are a joke! ***7) Rejection: In order to get an update about my situation, I sent a few e-mails to the Recruiter and the Hiring Manager. After weeks, probably after my 4th follow-up e-mail, the Hiring Manager wrote me that they decided to continue with the other candidates. He also did not write any feedback…

      Perguntas de entrevista [1]

      Pergunta 1

      What is the most fundamental data structure in pandas? What type of objects can be used as keys in Dictionaries? Which function is used to get the list of column headers of a pandas DataFrame? You have an "A" table and a "B" table. How can you write a query that returns the rows that "B" has but "A" does not have? Are you familiar with Linear Regression? How can you know whether your model is good or bad? What is Precision? What is Bias–Variance tradeoff?
      Responder à pergunta
      4

      Outras avaliações de entrevista de vagas de Data Scientist da empresa Nielsen

      Entrevista para Data Scientist

      5 de mar. de 2026
      Candidato(a) sigiloso(a) à entrevista
      Vicente López
      Oferta recusada
      Experiência positiva
      Entrevista com nível médio de dificuldade

      Candidatura

      Fiz uma entrevista na empresa Nielsen (Vicente López).

      Entrevista

      Primero telefónicamente se comunicaron y tuvimos una charla en inglés. Luego presencial con alguien de rrhh y finalmente con el líder de equipo del proyecto. En los tres casos tuve la reunión en español y en ingles para conocer mi nivel de habla y lisening.

      Perguntas de entrevista [1]

      Pergunta 1

      Estudios, trabajos realizados , experiencia laboral.
      Responder à pergunta

      Entrevista para Data Scientist

      30 de jan. de 2026
      Funcionário(a) sigiloso(a)
      Bengaluru
      Oferta aceita
      Experiência positiva
      Entrevista com nível médio de dificuldade

      Candidatura

      Fiz uma entrevista na empresa Nielsen (Bengaluru).

      Entrevista

      Interview was of three rounds. First round coding and multiple choice based questions. Second round was technical interview and third round was managerial. All the rounds were pretty smooth and the process was quite transparent.

      Perguntas de entrevista [1]

      Pergunta 1

      What is numpy and pandas?
      Responder à pergunta

      Entrevista para Data Scientist

      23 de jan. de 2025
      Candidato(a) sigiloso(a) à entrevista
      Bengaluru
      Nenhuma oferta
      Experiência positiva
      Entrevista fácil

      Candidatura

      Candidatei-me online. O processo levou 1 semana. Fui entrevistado pela Nielsen (Bengaluru) em jan. de 2025

      Entrevista

      Hi everyone, I recently gave the Nielsen Data Scientist test through HireVue. The questions were simple, covering Python, SQL, and aptitude. However, I strongly recommend Nielsen to not to use HireVue for the hiring process. The section-wise timing was uncomfortable and affected overall performance of candidates. I suggest Nielsen consider using a single timing for the entire test instead of separate timings for sections. This will let candidates show their strengths and weaknesses better, helping to select the best team for higher company performance. By clustering candidates performance, you can create a team of candidates with different expertise, such as one excelling in aptitude, another in ML, and others in statistics. This way, you can build a balanced and highly skilled team. Nielsen is a great place to work, but improving the test process would make it even better. Thank you!
      1

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