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

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

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

2. What skill is essential for a data engineer to efficiently transform and clean raw data into usable formats?

A) Data warehousing
B) Data visualization
C) ETL (Extract, Transform, Load) processes
D) Machine learning

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

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

4. What is the purpose of memory management in Apache Flink?

A) Convert all of the data into Java objects
B) Eliminate the need for serialization of the data
C) Control how much memory the runtime operations use
D) Ensure no disk space is ever required

5. In a relational database, what is a minimal set of attributes to uniquely identify a record in a table?

A) Candidate key
B) Super key
C) Foreign key
D) Primary key

Solutions: