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
Which Cassandra data type represents a collection of key-value pairs, and is represented in curly brackets ({, }) and colon (:)?
- A . List
- B . Map
- C . Set
- D . UUID
The penalty that the EU supervisory authority levies on an organization that fails to comply with the General Data Protection Regulation (GDPR) is the greater of 4% of total global annual turnover or revenue, or a fixed fine amount.
What is the fixed fine amount, in millions of Euros?
- A . 5
- B . 10
- C . 40
- D . 20
What is the default replication factor for HDFS?
- A . 2
- B . 3
- C . 4
- D . 6
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 . Ensuring the successful initiation, planning, design, execution, monitoring, controlling, and closure of the project
- C . Designing and integrating infrastructure, analyzing algorithms, modifying source code, and writing system instructions
- D . Preparing the Big Data environment to be utilized by data scientists and other business stakeholders
What are two Spark libraries?
- A . Spark SQL and GraphX
- B . Spark NoSQL and RDD
- C . Spark SQL and RDD
- D . Spark NoSQL and GraphX
Which of the following are key roles in data governance? (Select all that apply)
- A . Data Scientist
- B . Data Steward
- C . Chief Information Officer (CIO)
- D . Data Owner
- E . Data Analyst
What is a common use case for a document-based NoSQL database like MongoDB?
- A . Storing structured tabular data
- B . Tracking real-time data streams
- C . Managing hierarchical data
- D . Performing complex SQL queries
Which of the following describes Apache Flink?
- A . A distributed file storage system
- B . A graph processing framework
- C . A stream processing framework
- D . A batch processing engine
Which tool provides fine-grained access control and security for Hadoop components?
- A . Apache Atlas
- B . Apache Ranger
- C . Apache Knox
- D . Apache HBase
What is a common approach to handling errors and failures in data pipelines?
- A . Ignoring errors and continuing execution
- B . Relying solely on input data validation
- C . Implementing robust error handling and retries
- D . Allowing errors to propagate to end-users