Given a purchase table(user, purchase_time, amount_of_money, level1_category, level2_category), write a sql query to find the customer purchase in continue 7 days and with the total money greater than 500
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?
20,944 data engineer interview questions shared by candidates
Python: Count words, Count substring, Separate list of lists, Random number generator.
If you take 3 subsequent number (n, n+1, n+2) and know, that n and n+2 are prime numbers, can you proove, that n+1 is always dividable by 6?
Questions on the video call were technical, but basic. 1. What are ACID properties 2. What are indexes 3. What is the difference between Stored Procedures, Functions and Triggers 4. BASE properties 5. JVM, JRE, JDK and JIT 6. What are common table expressions 7. Difference between throw and throws in java 8. What is the difference between Clustered and non clustered index
If you had to rate your skill in SQL from 1 (no knowledge), to 4 (expert) what would you rate yourself?
Are you good and praticale in fixing stuff and object ?
Related to database schemas and data analysis.
# Q1: Write a function to intersect two *sorted* lists (find common elements) # Write a method taking two lists as input, and returning a new list # You can assume you have a reasonable array/list class available (ArrayList, vector, python list, etc) # Ex: # l1 = [1,2,3,4,5] # l2 = [1,5,7,11,100] # result = [1,5]
Implement a library function which takes a collection of integers (Collection<Integer>) computes its sum and returns the result. The implementation must establish preconditions which ensure lack of runtime error(s). Implement the above function using recursion only.
Explain how to get information from Excel over to the database
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