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

1. In order for a table to be normalized in 4NF, what two conditions must be met?

A) Table is in BCNF
No multi-valued dependencies exist
B) Table is in 3NF
No multi-valued dependencies exist
C) Table is in 3NF
No dependencies exist
D) Table is in BCNF
Multi-valued depen

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

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

3. In the ELT process, data is transformed after being loaded into the target system.
Which tools can be used for ELT? (Select all that apply)

A) Microsoft SSIS
B) Apache Spark
C) Amazon Redshift
D) Apache Hadoop
E) Talend

4. What ethical principle emphasizes that collected data should be used for its original intended purpose?

A) Transparency
B) Data minimization
C) Purpose limitation
D) Accountability

5. What is a significant advantage of using a columnar store NoSQL database for analytical workloads?

A) High-speed transaction processing
B) Optimized query performance on large datasets
C) Efficient storage of hierarchical data
D) Real-time data synchronization

Solutions: