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 characteristic of a relational database ensures that each row in a table is uniquely identifiable?
- A . Indexing
- B . Joins
- C . Primary key
- D . Foreign key
What are three programming languages supported by Apache Spark?
- A . Python, R, and Scala
- B . PL/SQL, R, and Scala
- C . Python, R, and C++
- D . Python, C, and Scala
What is a characteristic of Pig?
- A . Performs real-time reads and writes in HDFS
- B . Uses HiveQL to translate SQL queries into MapReduce jobs
- C . Data warehouse infrastructure that manages jobs in the cluster
- D . Alternative language to Java programming for MapReduce
What is a characteristic of Pig?
- A . Performs real-time reads and writes in HDFS
- B . Uses HiveQL to translate SQL queries into MapReduce jobs
- C . Data warehouse infrastructure that manages jobs in the cluster
- D . Alternative language to Java programming for MapReduce
You are designing a genomics analysis application and need to set up an Apache Oozie job to execute a single MapReduce workflow at 12:00 AM EST every day.
Which Oozie job type should you implement?
- A . Coordinator
- B . Bundle
- C . JobTracker
- D . Workflow
Which tools are used for security considerations in the Hadoop ecosystem? (Select all that apply)
- A . Apache Atlas
- B . Apache Ranger
- C . Apache Knox
- D . Apache Sentry
- E . Apache Flink
Which tools are used for security considerations in the Hadoop ecosystem? (Select all that apply)
- A . Apache Atlas
- B . Apache Ranger
- C . Apache Knox
- D . Apache Sentry
- E . Apache Flink
In Python, which primitive data type covers real rational and irrational numbers?
- A . String
- B . Integer
- C . Float
- D . Boolean
What step in a query plan determines the best execution path for the provided query?
- A . Execution
- B . Optimizer
- C . Algebrizer
- D . Parser