DELL EMC D-DS-OP-23 Practice Exams
Last updated on Oct 22,2026- Exam Code: D-DS-OP-23
- Exam Name: Dell Data Engineering Optimize
- Certification Provider: DELL EMC
- Latest update: Oct 22,2026
A company needs to fill an opening for a key tactical data governance position. The new hire is to be a subject matter expert on customer data and ensure the data policies and standards are adhered to on a daily basis. This role bridges the gap between a data governance program and its execution.
What is a suitable job title for this role?
- A . Data miner
- B . Data scientist
- C . Data steward
- D . Data engineer
A company needs to fill an opening for a key tactical data governance position. The new hire is to be a subject matter expert on customer data and ensure the data policies and standards are adhered to on a daily basis. This role bridges the gap between a data governance program and its execution.
What is a suitable job title for this role?
- A . Data miner
- B . Data scientist
- C . Data steward
- D . Data engineer
What is metadata in the context of data governance?
- A . Data encryption keys
- B . Data quality metrics
- C . Data access logs
- D . Data about data
Which feature of Apache Kafka makes it suitable for handling high-throughput data streams?
- A . In-memory data storage
- B . Partitioning and replication
- C . Only supports batch processing
- D . Static schema enforcement
What is characteristic of HBase?
- A . High-level language platform for analyzing and querying large data sets stored in HDFS
- B . Data warehouse infrastructure that can compile SQL queries and run the jobs in cluster
- C . Tool that combines SQL, streaming, and complex analytics
- D . Tool that performs real-time write operations on large datasets using Key/Value pairs
Which Python library formats data into dataframes?
- A . NLTK
- B . NumPy
- C . Pandas
- D . scikit-learn
With Apache Kafka, what is an advantage of implementing the Publish/Subscribe messaging system over Point-to-Point messaging system?
- A . Messages can be dynamically moved between topics to improve the overall throughput of the system
- B . Any message published to a topic is immediately received by all the subscribers to that topic
- 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
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 . Apache Hadoop
- B . Apache Spark
- C . Talend
- D . Microsoft SSIS
- E . Amazon Redshift
What enables Apache Spark to process data more efficiently than Hadoop’s MapReduce?
- A . JobTracker functionality has been replaced by YARN
- B . Intermediate processing data is always written to disk
- C . Apache Flink is the compute engine
- D . Data is cached in memory whenever possible
What is the primary storage system used by the Hadoop ecosystem?
- A . MongoDB
- B . HDFS
- C . Amazon S3
- D . Cassandra