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

1. Which Sqoop validation type checks the row counts between the source and target databases, and tries to ensure that the counts match?

A) ValidationFailureHandler
B) Validator
C) Eval
D) ValidationThreshold

2. What enables Pravega to rapidly ingest streaming data into durable storage?

A) Relational database schema
B) Apache Spark
C) Append-only logs
D) MongoDB

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

A) 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.
B) Data governance is an informal system of decision making.
MDM is a formal system of decision making.
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.

4. In an Apache Spark Streaming environment, what acts as an entry point to the streaming system and provides methods to create and transform DStreams?

A) Streams API
B) StreamingContext
C) Spark Core
D) Receiver

5. Which Python library formats data into dataframes?

A) scikit-learn
B) Pandas
C) NumPy
D) NLTK

Solutions: