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

1. What is the purpose of sensor operators in Apache Airflow?

A) Move data sequentially from one system to another
B) Use triggers to report each successive retry
C) Perform validation checks in parallel
D) Use a poke method to monitor external processes

2. Which CouchDB function can be used to create a document?

A) Update
B) List
C) Create
D) Insert

3. What is the purpose of Apache Airflow?

A) Data processing
B) Data visualization
C) Workflow automation
D) Data storage

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

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

5. 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) Columnar
B) Star
C) Graph
D) Highly Normalized

Solutions: