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

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

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

2. What is the primary storage system used by the Hadoop ecosystem?

A) HDFS
B) MongoDB
C) Amazon S3
D) Cassandra

3. An organization plans to establish a data governance process for a data lake.
What is the correct sequence of steps required to implement the process?

A) 1. Define the roles and responsibilities of actors within the data governance process
2. Operationalize the data governance process and assist the deployment team
3. Understand the current and future states of data governance and identify remaining gaps
4. Develop the business value statement and a baseline for ongoing measurement of the data governance deployment
B) 1. Define the roles and responsibilities of actors within the data governance process
2. Develop the business value statement and a baseline for ongoing measurement of the data governance deployment
3. Operationalize the data governance process and assist the deployment team
4. Understand the current and future states of data governance and identify remaining gaps
C) 1. Develop the business value statement and a baseline for ongoing measurement of the data governance deployment
2. Define the roles and responsibilities of actors within the data governance process
3. Operationalize the data governance process and assist the deployment team
4. Understand the current and future states of data governance and identify remaining gaps
D) 1. Define the roles and responsibilities of actors within the data governance process
2. Operationalize the data governance process and assist the deployment team
3. Develop the business value statement and a baseline for ongoing measurement of the data governance deployment
4. Understand the current and future states of data governance and identify remaining gaps

4. Which characteristic of a relational database ensures that each row in a table is uniquely identifiable?

A) Indexing
B) Joins
C) Primary key
D) Foreign key

5. What enables Apache Spark to process data more efficiently than Hadoop's MapReduce?

A) JobTracker functionality has been replaced by YARN
B) Apache Flink is the compute engine
C) Data is cached in memory whenever possible
D) Intermediate processing data is always written to disk

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