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

1. What is a primary task of a data engineer during a data analytics project?

A) Installing, configuring, testing, and maintaining operating systems, application software, and system management tools
B) Preparing the Big Data environment to be utilized by data scientists and other business stakeholders
C) Ensuring the successful initiation, planning, design, execution, monitoring, controlling, and closure of the project
D) Designing and integrating infrastructure, analyzing algorithms, modifying source code, and writing system instructions

2. What is the main programming language supported by Apache Spark?

A) C++
B) Ruby
C) Java
D) Python

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 Hadoop
C) Apache Spark
D) Amazon Redshift
E) Talend

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

A) Data governance focuses mainly on IT practices.
MDM creates the rules and decisions for operational data processes.
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 is a formalized system of decision making.
MDM is a comprehensive method to link all data elements to a common point of reference.

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

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

Solutions: