you have a table containing order id order date and customer id write a sql query to fetch all the customer id which have visited again ( customer id is same for customer but order id will change every time they will order )
Datenanalysten Interview Questions
46,239 datenanalysten interview questions shared by candidates
Are you confident in learning a new RPA tools and complete a project within 6 months.
Introduce yourself in deep manner
None - All standard. Like "Why Shopify" Why Data Analyst?
The difficulties were in the marketing questions: (may not be exact) "what experiment could you perform on social media to determine consumer intent" or "how could you use the Reddit or Pinterest API for our analysis"
Behavioural questions as per general
What is your job authorization?
If I had a conflict in my previous work places how did I solve it?
Comment situez-vous au sein d'une équipe?
Suppose we have a binary classification problem. 99.8% of individuals in our sample = 0, 0.2% = 1. We downsample: we randomly sample say 1% of the individuals which =0, but keep all which =1. We fit our model to this new smaller sample, and now we have a model which produces probabilities that an individual = 1. How do we adjust our output probabilities to use this model on the population as a whole?
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