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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 flexible to source data changes such as new variables or attributes.
C) ETL jobs should be manually executed and monitored to ensure the highest quality.
D) A failed ETL job should always be marked as completed so that any other scheduled jobs can execute.

2. In the ELT process, data is transformed after being loaded into the target system.
Which tools can be used for ELT? (Select all that apply)

A) Apache Spark
B) Amazon Redshift
C) Apache Hadoop
D) Microsoft SSIS
E) Talend

3. Which NoSQL database type is best suited for handling graph-based data structures and complex relationships?

A) Graph database
B) Column-family store
C) Document store
D) Key-value store

4. What is a characteristic of Pig?

A) Performs real-time reads and writes in HDFS
B) Alternative language to Java programming for MapReduce
C) Data warehouse infrastructure that manages jobs in the cluster
D) Uses HiveQL to translate SQL queries into MapReduce jobs

5. What is the purpose of Apache Airflow?

A) Workflow automation
B) Data storage
C) Data visualization
D) Data processing

Solutions: