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

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

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

2. You are designing a database for an e-commerce data warehouse. The data is normalized in 1NF format and will be used to create data marts for different departments inside the organization.
Which schema type should be used for this requirement?

A) Graph
B) Star
C) Highly Normalized
D) Columnar

3. What is a common use case for a document-based NoSQL database like MongoDB?

A) Storing structured tabular data
B) Managing hierarchical data
C) Tracking real-time data streams
D) Performing complex SQL queries

4. What is a typical task of a data engineer during a data analytics project?

A) Planning and performing A/B testing
B) Presenting financial benefits to executive stakeholders
C) Exploring and examining data to find hidden patterns
D) Transforming data into a format that can be easily analyzed

5. An organization wants to simplify the data ingestion configuration process through simple click, drag, and drop type actions.
Which tool provides an easy to use graphical user interface for building data pipeline data flows?

A) Apache Pig
B) Apache Airflow
C) Apache Spark
D) Apache Hadoop

Solutions: