D-DS-OP-23 Practice Exam Tests Latest Updated on Jul-2025
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NEW QUESTION # 51
In Python, which primitive data type covers real rational and irrational numbers?
- A. Boolean
- B. String
- C. Float
- D. Integer
Answer: C
NEW QUESTION # 52
In a relational database, what is a minimal set of attributes to uniquely identify a record in a table?
- A. Foreign key
- B. Super key
- C. Primary key
- D. Candidate key
Answer: C
NEW QUESTION # 53
Which Sqoop validation type checks the row counts between the source and target databases, and tries to ensure that the counts match?
- A. Validator
- B. ValidationFailureHandler
- C. Eval
- D. ValidationThreshold
Answer: D
NEW QUESTION # 54
What is the data governance role that leverages the data for business purposes, such as increasing sales or reducing manufacturing costs?
- A. End user
- B. Data custodian
- C. Security specialist
- D. Data steward
Answer: A
NEW QUESTION # 55
What is a common use case for a document-based NoSQL database like MongoDB?
- A. Performing complex SQL queries
- B. Managing hierarchical data
- C. Storing structured tabular data
- D. Tracking real-time data streams
Answer: B
NEW QUESTION # 56
What is the purpose of memory management in Apache Flink?
- A. Eliminate the need for serialization of the data
- B. Control how much memory the runtime operations use
- C. Ensure no disk space is ever required
- D. Convert all of the data into Java objects
Answer: B
NEW QUESTION # 57
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. Designing and integrating infrastructure, analyzing algorithms, modifying source code, and writing system instructions
- C. Preparing the Big Data environment to be utilized by data scientists and other business stakeholders
- D. Ensuring the successful initiation, planning, design, execution, monitoring, controlling, and closure of the project
Answer: C
NEW QUESTION # 58
What enables Pravega to rapidly ingest streaming data into durable storage?
- A. MongoDB
- B. Relational database schema
- C. Apache Spark
- D. Append-only logs
Answer: D
NEW QUESTION # 59
What step in a query plan determines the best execution path for the provided query?
- A. Parser
- B. Execution
- C. Optimizer
- D. Algebrizer
Answer: C
NEW QUESTION # 60
Which of the following data structures in Python is immutable?
- A. List
- B. Set
- C. Dictionary
- D. Tuple
Answer: D
NEW QUESTION # 61
Which of the following accurately describes Apache Storm? (Select all that apply)
- A. A batch processing framework
- B. A distributed stream processing system
- C. A file storage system
- D. A machine learning library
Answer: B
NEW QUESTION # 62
Why is it important to control the capabilities of a workload during runtime in Kubernetes?
- A. Enable management of application secrets
- B. Apply API authorization on a cluster
- C. Support data exfiltration from a pod
- D. Limit resource usage on a cluster
Answer: D
NEW QUESTION # 63
What is the primary storage system used by the Hadoop ecosystem?
- A. MongoDB
- B. Amazon S3
- C. Cassandra
- D. HDFS
Answer: D
NEW QUESTION # 64
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 performs real-time write operations on large datasets using Key/Value pairs
- D. Tool that combines SQL, streaming, and complex analytics
Answer: C
NEW QUESTION # 65
Which skill is crucial for a data engineer to effectively manage and optimize large-scale data processing systems?
- A. Cloud computing
- B. Data analysis
- C. Graphic design
- D. Front-end development
Answer: A
NEW QUESTION # 66
Which of the following are key roles in data governance? (Select all that apply)
- A. Data Steward
- B. Data Owner
- C. Data Scientist
- D. Data Analyst
- E. Chief Information Officer (CIO)
Answer: A,B,E
NEW QUESTION # 67
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 engineer
- D. Data steward
Answer: D
NEW QUESTION # 68
In a data analytics project, what is the primary responsibility of a data engineer?
- A. Designing machine learning models
- B. Conducting statistical analysis
- C. Creating data visualizations
- D. Building data pipelines and ETL processes
Answer: D
NEW QUESTION # 69
Which of the following are security considerations when using cloud services with Hadoop? (Select all that apply)
- A. Regularly updating software and patches
- B. Data encryption in transit and at rest
- C. Storing all data on public GitHub repositories
- D. Multi-factor authentication
Answer: A,B,D
NEW QUESTION # 70
Match each Apache Storm component with its description.
Answer:
Explanation:
NEW QUESTION # 71
Which component of the Apache Atlas framework allows metadata to be added to the Atlas environment?
- A. Apps
- B. Metadata Sources
- C. Graph Engine
- D. Ingest/Export
Answer: D
NEW QUESTION # 72
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