EMC Dell Data Scientist and Data Engineering Optimize 2023

QUESTION NO: 1
A manufacturing organization intents to minimize production costs by analyzing real-time data after implementing IoT tools.
Which business driver would be affected if the organization follows this strategy?

A. Operational efficiency B. Customer experience C. New sources of revenue D. Product choices

Correct Answer: A

QUESTION NO: 2
What is a significant advantage of using a columnar store NoSQL database for analytical workloads?

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

Correct Answer: C

QUESTION NO: 3
Which Apache project focuses on managing and governing metadata for Hadoop ecosystems?

A. Apache Ranger B. Apache Atlas C. Apache Hive D. Apache HBase

Correct Answer: B

QUESTION NO: 4
Which of the following describes Apache Flink?

A. A distributed file storage system B. A batch processing engine C. A graph processing framework D. A stream processing framework

Correct Answer: D

QUESTION NO: 5
In a relational database, what is a minimal set of attributes to uniquely identify a record in a table?

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

Correct Answer: D

QUESTION NO: 6
With Apache Kafka, what is an advantage of implementing the Publish/Subscribe messaging system over Point-to-Point messaging system?

A. Any message published to a topic is immediately received by all the subscribers to that topic B. Messages can be dynamically moved between topics to improve the overall throughput of the system C. Messages stored are deduplicated automatically to increase the overall storage capacity of a topic D. Any message published to a topic is received only by a few subscribers to that topic

Correct Answer: A

QUESTION NO: 7
Which of the following are components of the Apache Spark Streaming architecture? (Select all that apply)

A. HDFS storage B. Worker node C. Discretized streams (DStreams) D. Driver node E. Kafka topics

Correct Answer: B,C,D

QUESTION NO: 8
What is a common use case for a document-based NoSQL database like MongoDB?

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

Correct Answer: B

QUESTION NO: 9
Match each major support project of Hadoop with its definition.

Correct Answer:

QUESTION NO: 10
What is the primary use of sets in Python?

A. Storing ordered sequences B. Storing hierarchical data C. Storing key-value pairs D. Storing unique elements

Correct Answer: D

EMC Dell Data Scientist and Data Engineering Optimize 2023 - D-DS-OP-23 Exam Questions