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
What step in a query plan determines the best execution path for the provided query?
- A . Execution
- B . Optimizer
- C . Algebrizer
- D . Parser
Which NoSQL database type is most suitable for applications requiring high-speed, low-latency data retrieval based on simple lookups?
- A . Document store
- B . Key-value store
- C . Column-family store
- D . Time-series database
Which of the following are data pipeline best practices? (Select all that apply)
- A . Using a monolithic design for simplicity
- B . Ensuring data quality and validation
- C . Avoiding error handling and monitoring
- D . Using a single tool for all pipeline components
An organization wants to simplify the data ingestion configuration process through simple click, drag, and drop type actions.
Which tool provides an easy to use graphical user interface for building data pipeline data flows?
- A . Apache Spark
- B . Apache Hadoop
- C . Apache Pig
- D . Apache Airflow
What is a privacy regulation that aims to protect the personal data of European Union citizens?
- A . HIPAA
- B . CCPA
- C . GDPR
- D . FERPA
What is the main programming language supported by Apache Spark?
- A . Java
- B . Python
- C . C++
- D . Ruby
How is replication implemented in Redis?
- A . Client-server communication protocol is used, whereby every client replicates data from the server
- B . Data is shared among many computers to enable fault tolerance and data accessibility
- C . Meta information is generated based on the client-server communication protocol
- D . The developer copies and pastes the data in multiple databases
What is the primary use of sets in Python?
- A . Storing key-value pairs
- B . Storing ordered sequences
- C . Storing unique elements
- D . Storing hierarchical data
In an Apache Spark Streaming environment, what acts as an entry point to the streaming system and provides methods to create and transform DStreams?
- A . Receiver
- B . Spark Core
- C . Streams API
- D . StreamingContext