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EMC Dell Data Scientist and Data Engineering Optimize 2023 Sample Questions:

1. What is a data pipeline best practice related to Extract-Transform-Load (ETL) jobs?

A) A failed ETL job should be re-run immediately without taking any corrective actions.
B) ETL jobs should be manually executed and monitored to ensure the highest quality.
C) ETL jobs should be flexible to source data changes such as new variables or attributes.
D) A failed ETL job should always be marked as completed so that any other scheduled jobs can execute.

2. What step in a query plan determines the best execution path for the provided query?

A) Algebrizer
B) Optimizer
C) Parser
D) Execution

3. In Python, which non-primitive data structure can only be a collection of primitive data types?

A) List
B) Dictionary
C) Tuple
D) Array

4. In Python, which type of non-linear list always has a common root?

A) Stacks
B) Queues
C) Trees
D) Graphs

5. What is the purpose of sensor operators in Apache Airflow?

A) Use a poke method to monitor external processes
B) Use triggers to report each successive retry
C) Perform validation checks in parallel
D) Move data sequentially from one system to another

Solutions: