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
Question #41
Which of the following are security considerations when using cloud services with Hadoop? (Select all that apply)
- A . Data encryption in transit and at rest
- B . Multi-factor authentication
- C . Storing all data on public GitHub repositories
- D . Regularly updating software and patches
Correct Answer: ABD
Question #42
What is a common application of IoT tools?
- A . Processing large-scale batch data
- B . Analyzing static datasets
- C . Monitoring real-time sensor data
- D . Managing relational databases
Correct Answer: C
Question #43
What is a significant advantage of using a columnar store NoSQL database for analytical workloads?
- A . High-speed transaction processing
- B . Efficient storage of hierarchical data
- C . Optimized query performance on large datasets
- D . Real-time data synchronization
Correct Answer: C
Question #44
What is the purpose of sensor operators in Apache Airflow?
- A . Perform validation checks in parallel
- B . Move data sequentially from one system to another
- C . Use triggers to report each successive retry
- D . Use a poke method to monitor external processes
Correct Answer: D
Question #45
What is a metadata management challenge?
- A . Information sources are limited
- B . Ensuring availability of source systems
- C . Data corruption over time
- D . Leveraging the information from distributed sources
Correct Answer: D
Question #46
What is the primary advantage of using dictionaries in Python data pipelines?
- A . Dictionaries allow duplicate values
- B . Dictionaries maintain element order
- C . Dictionaries offer O(1) lookup time
- D . Dictionaries support mathematical operations
Correct Answer: C
Question #47
Which CouchDB function can be used to create a document?
- A . Insert
- B . Create
- C . Update
- D . List
Correct Answer: C
Question #48
Which of the following are components of the Apache Spark architecture? (Select all that apply)
- A . Spark Core
- B . Spark SQL
- C . Spark HBase
- D . Spark Streaming
- E . Spark Cassandra
Correct Answer: ABD
Question #49
In Python, which non-primitive data structure can only be a collection of primitive data types?
- A . Array
- B . Dictionary
- C . Tuple
- D . List
Correct Answer: A
Question #50
What is the storage architecture of Pravega?
- A . File-based storage
- B . In-memory storage
- C . Object-based storage
- D . Columnar storage
Correct Answer: C