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

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

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

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

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

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

4. What is a difference between Data Governance and Master Data Management (MDM)?

A) Data governance is an informal system of decision making.
MDM is a formal system of decision making.
B) Data Governance is a formalized system of decision making.
MDM is a comprehensive method to link all data elements to a common point of reference.
C) Data governance implementation involves people, policies, rules, and metrics.
MDM is done automatically with no interference.
D) Data governance focuses mainly on IT practices.
MDM creates the rules and decisions for operational data processes.

5. Which of the following are characteristics of the Hadoop ecosystem? (Select all that apply)

A) Real-time processing
B) Scalability
C) Batch processing
D) Low fault tolerance
E) Single-node architecture

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