# Q2: Same as Q1, but now assume there can be duplicates. The output should not have duplicates # Ex: # l1 = [1,2,3,4,5,5,5] # l2 = [1,5,7,11,100] # result = [1,5]
Data Engineer Interview Questions
Data Engineer Interview Questions
Data engineers zijn IT-professionals en zijn in bijna elke bedrijfstak nodig. Data engineers volgen gegevenstrends voor het vaststellen van de beste vervolgstappen voor bedrijven. Een cruciaal onderdeel van het werk van een data engineer bestaat uit het verwerken van ruwe gegevens tot bruikbare gegevens door datapipelines te creëren en gegevenssystemen te bouwen.
Meest gestelde sollicitatievragen voor een data engineer (M/V/X) en hoe te antwoorden
Vraag 1: Kunt u tot in detail uw kennisniveau van programmeertalen omschrijven?
Vraag 2: Leg in uw eigen woorden uit wat data engineering inhoudt.
Vraag 3: Kunt u uw ervaring met Apache Hadoop en databeheer in een cloudomgeving beschrijven?
20,956 data engineer interview questions shared by candidates
Data Model: LinkedIn data model - model for 1st degree connection Python: 1. Dedup items in the list - retaining the order of items. ==> cannot use dict/set since order will not be retained. Follow up question on this - How would you handle nested lists? (they are looking for recursion) 2. Find the number of words in a sentence /avg length of word SQL On the product-sales-customers data model that is preloaded in coderpad.io, write the following queries 1. Count of stores in OR state with area_sqft > 25000 2. avg number of Female Customers group by state 3. Customer FirstName, Last Name and count of unqiue products purchased by state followup question - Return the top customer by state based on diverse product purchased (diverse = count(distinct product_id))
What percent of all products in the grocery chain's catalog are both low fat and recyclable?
Write a query that returns product_family, units_sold, percentage of promoted.
Write a python program to remove duplicates , keep the first occurrance
The rest 30minutes was for algorithmic programming in language of your choice. I completed 3.5 questions in 30minutes.
SQL Coding: 5 questions 4 tables were given and questions were mostly on joins, aggregate functions, sub queries. Python Coding: I guess there were total 5 questions but could reach only till second question. Count the number of words in a sentence. Count the frequency of words from the list and store the results in a hash map.
sql and python question 5+5
Basic data structure and sql statement at a very high level short answers
Python (1) Count "char" in the string. (2) Replace "None" in an array. Codes are simple but passing edge cases are difficult. SQL several % calculation questions
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