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      Ricerche correlate: Recensioni su Zoom Communications | Offerte di lavoro di Zoom Communications | Stipendi di Zoom Communications | Benefit di Zoom Communications
      Colloqui di Zoom CommunicationsColloqui per Senior Data Scientist presso Zoom CommunicationsColloquio di Zoom Communications


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      Colloquio per Senior Data Scientist

      10 ago 2017
      Candidato anonimo a colloquio
      Offerta rifiutata
      Esperienza negativa
      Colloquio facile

      Candidatura

      Ho presentato la mia candidatura online. Ho sostenuto un colloquio presso Zoom Communications

      Colloquio

      From a very pleasant beginning to a very unpleasant end, which shows the very irresponsible culture of this start-up company. Contacted by the recruiter, everything goes very fast at first. Screening interview on Tuesday and then "video onsite" on Thursday the same week with five people. During the video interview, a dataset challenge was proposed with 1.5 hour with 15 questions related to data mining, machine learning, etc. Did not finish within 1.5 hour and was given one more day to finish it and submitted on the same week Friday. The recruiter promised to came back the very next Monday and the team head promised to came back the next week. Then nothing happened the following week and I asked the recruiter again, he said Zoom was interviewing with other candidates and would came back one more week and let me know before Wednesday (two weeks after the screening). Then I asked again after two weeks later and no response, no rejection letter, no feedback. No comment on the new data science team since any background can do very well in data science after very intense training on machine learning and statistical modeling. But I strongly dislike the irresponsible culture. Rejecting a candidate is not a problem at all but pending a candidate is a serious one. In addition, do not promise to the candidates any more on when to give the response, which looks like you are playing with the candidate .

      Domande di colloquio [1]

      Domanda 1

      1) Scan through the below steps and import needed Python libraries (don’t worry, you can import them later if you forget one) 2) Load the data from the csv file 3) Perform basic commands to understand the data 4) Bin the following features: a) 'currentterm' into [0 to 11], [11 and more] b) 'mrr_entry' into [0 to 14.99], [14.99 to 500], [500 to 5K], [5K and more] c) 'account_age’ into [0 to 90], [90 to 180], [180 to 360], [360 and more] d) 'days_left_in_term’ into [0 to 30], [30 to 360], [360 and more] 5) Set 'churn_next_90' as your target column 6) Set 'zoom_account_no' as an ID column, this should not be a feature 7) Set 'ahs_date' as a date column, this should not be a feature 8) Treat the binned features from step (4) and the following features as categorical features: a) 'sales_group', b) 'employee_count', c) 'coreproduct' 9) Perform feature selection using your preferred method and ML algorithm. Choose 10 features and continue to step (10). 10) Divide the new data frame (with 10 features) into test and train subset 11) Use a different algorithm from part (9) and perform cross-validation method for parameter tuning. Print out the results. 12) Based on results from (11), fit your model on the train subset 13) Test your fitted model using the test subset 14) Print feature importance, accuracy score (roc_auc_score), and confusion matrix (crosstab) from step (13) 15) Save your trained model using pickle
      Rispondi alla domanda
      7

      Altre recensioni di colloqui per Senior Data Scientist presso Zoom Communications

      Colloquio per Senior Data Scientist

      27 apr 2022
      Candidato anonimo a colloquio
      Poona
      Nessuna offerta
      Esperienza negativa
      Colloquio facile

      Candidatura

      Ho presentato la mia candidatura tramite segnalazione di un dipendente. La procedura ha richiesto 2 settimane. Ho sostenuto un colloquio presso Zoom Communications (Poona) nel mese di apr 2022

      Colloquio

      Just got a call from HR for Phone Screening. Didn't get a call for Interview. HR mentioned she would schedule interview for the role, but I didn't. Today I saw that my application was rejected.

      Colloquio per Senior Data Scientist

      14 ott 2017
      Dipendente anonimo
      San Jose, CA
      Offerta accettata
      Esperienza positiva
      Colloquio nella media

      Candidatura

      Ho presentato la mia candidatura online. La procedura ha richiesto 7 settimane. Ho sostenuto un colloquio presso Zoom Communications (San Jose, CA) nel mese di lug 2017

      Colloquio

      Applied online and contacted by recruiter after a few days. Initially interviewed with the recruiter using Zoom meeting. The recruiter provided me information about the role/team and the company. He was very friendly and helpful throughout the process. Then I received a take-home challenge after the recruiter screening. The take-home contains questions related to machine learning skills and brain teasers. After submitting the take-home, I went on-site after two weeks. During the on-site visit, I talked to Head of Business, Head of HR and Data Science Team Lead. The questions are mixed of technical and behavioral. I walked them through some projects I did in the past. The final round of the on-site is a case study. I was given a dataset related to Zoom account and they asked me to work on the Python data processing/machine learning tasks for 1 hour. After finishing it, I discussed the result with the Team Lead and one Data Scientist in the team. After 3 weeks, I received an invite from Head of Business for final Zoom interview. Got an offer within a week. Overall, the experience was good. People are friendly at Zoom and well prepared for the interview. Only thing I would complain is the process time is too long, but the recruiter kept me updated throughout the process.

      Domande di colloquio [1]

      Domanda 1

      Walk me through some machine learning project you've done in the past. What would you do if you have conflicts with teammates? What did you learn from the current role?
      Rispondi alla domanda
      1

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