Bellow is a table called fact_daily_users, which contains the users who were active on a specific date with the specific action they have made (aggregate total actions per row). user_id | date | action| total_actions| day_in_row 332 |17/06| view | 1 | 1 332 |20/06| view | 6 | 1 332 |20/06| click | 2 | 1 221 |24/06| view | 4 | 1 221 |24/06| click | 2 | 1 221 |21/06| view | 1 | 2 221 |20/06| view | 1 | 1 332 |21/06| view | 4 | 2 332 |21/06| click | 3 | 2 Q1: write a query that calculates the logic of day_in_row field with SQL, no joins are allowed. "day_in_row" shows consecutive days for user - users that return day after day to the website per row. Q2: write a function (Python / Java) that gets sql query and returns the output in json object
Data Engineer Interview Questions
Data Engineer Interview Questions
I Data engineer sono professionisti informatici richiesti pressoché in tutti i settori. Si occupano di monitorare i trend dei dati per pianificare le azioni più adeguate che un'azienda deve intraprendere. Uno degli aspetti più critici del lavoro di un Data engineer è l'elaborazione dei dati grezzi e la loro trasformazione in dati utilizzabili per creare pipeline e sistemi di dati.
Domande tipiche dei colloqui per Data engineer e come rispondere
Domanda 1: Puoi descrivere in dettaglio il tuo livello di competenza nell'ambito dei linguaggi di programmazione?
Domanda 2: Spiega a parole tue che cos’è il data engineering.
Domanda 3: Puoi descrivere un'esperienza lavorativa con Apache Hadoop e in ambienti di gestione dei dati nel cloud?
20,206 data engineer interview questions shared by candidates
What is Integration Runtime in azure?
Banking application code verification, bug fixes and performance improvement.
Python 1. How to remove duplicates 2. Words frequency in a dictionary 3. Multiple Constraints based dictionary questions SQL 1. Find the time between next station for a train
How to trouble shoot error in their algorithm software.
how do you think the optimization of the algorithm
How would you use Python to flatten a JSON object?
Aws - Boto3 SQL - Case Satement - Mod function - Qualify Row Number - Checksum Unix - Find hidden files within a folder Tons of behavioral questions
1) Imagine you are data modeling Netflix and create the entities and relationships involved using a modeling tool. 2) follow a link to a sql tool which shows 4 tables. Run some provided sql to populate the tables, Create the sql to aggregate the data and provide a result set showing the top row.
Imagine you receive an alert indicating that a group of servers in one pod has gone offline. How would you approach troubleshooting and resolving this issue?
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