D-DS-OP-23 by EMC Valid Free Exam Practice Test

Question 1

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

Correct Answer: A

Question 2

Refer to the exhibit.

Which shows a table named Student.
What changes must be made to the table in order to achieve 1NF?

A. Remove duplicate rows in the table B. Make Zip the primary key in the table C. Split table into two tables named Student and Zip D. Split table into two tables named Student and DoB

Correct Answer: A

Question 3

What is a common application of IoT tools?

A. Monitoring real-time sensor data B. Processing large-scale batch data C. Analyzing static datasets D. Managing relational databases

Correct Answer: A

Question 4

Which layer in the EdgeX Foundry architecture provides a REST API that enables clients to establish new requests?

A. Device Services B. Application/Export Services C. Support Services D. Core Services

Correct Answer: B

Question 5

Which of the following are key roles in data governance? (Select all that apply)

A. Chief Information Officer (CIO) B. Data Analyst C. Data Owner D. Data Scientist E. Data Steward

Correct Answer: A,C,E

Question 6

What is the primary storage system used by the Hadoop ecosystem?

A. HDFS B. MongoDB C. Cassandra D. Amazon S3

Correct Answer: A

Question 7

In Python, which primitive data type covers real rational and irrational numbers?

A. String B. Integer C. Boolean D. Float

Correct Answer: D

Question 8

What is an advantage of avoiding bias from the data?

A. Minimize Bias-Variance trade-off B. Reduce misuse of data and facilitate its transparency C. Minimize transparency at the point of data collection D. Decrease trust between humans and machines

Correct Answer: B

Question 9

Which Cassandra data type represents a collection of key-value pairs, and is represented in curly brackets ({, }) and colon (:)?

A. List B. Set C. UUID D. Map

Correct Answer: D

Question 10

Match each Apache Kafka component with its description.

Correct Answer:

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