Free DA0-002 sample questions

Correct answer: Data Lakehouse

A Data Lakehouse is the correct answer. It is a modern architecture that combines the flexibility and cost-efficiency of a data lake (ideal for unstructured data like medical images) with the ACID transactional capabilities and data management features of a traditional data warehouse (required for billing records). Data Lakes lack native ACID transactional support, and Data Warehouses are poorly suited for unstructured data storage. A Data Mart is just a subset of a data warehouse focused on a specific business line.

Correct answer: BLOB

BLOB (Binary Large Object) is the correct data type for storing binary data such as images, multimedia, or PDF files. CLOB (Character Large Object) is used for massive amounts of text data (like large XML or JSON documents), not binary files. String is used for standard, short alphanumeric text. GUID is used for generating unique identifiers, not for file storage.

Correct answers: Natural Language Processing (NLP); Generative AI

Natural Language Processing (NLP) is required to understand, interpret, and summarize the human language in the customer reviews. Generative AI is required to create the realistic, synthetic demographic data for testing. RPA is used for automating repetitive, rule-based tasks (like data entry), not generating text or synthetic data. Predictive analytics forecasts future outcomes based on historical data. Descriptive analytics summarizes what happened in the past.

Generative AI is required to create the realistic, synthetic demographic data for testing. Natural Language Processing (NLP) is required to understand, interpret, and summarize the human language in the customer reviews. RPA is used for automating repetitive, rule-based tasks (like data entry), not generating text or synthetic data. Predictive analytics forecasts future outcomes based on historical data. Descriptive analytics summarizes what happened in the past.

Correct answer: Containerization

Containerization (using tools like Docker) packages code, libraries, and dependencies into a single isolated unit called a container. This ensures the application runs identically across different computing environments (local, on-premises, or cloud). Block storage is a storage architecture. A Data Lakehouse is a data repository. Object storage handles unstructured data storage at scale. graph TD subgraph Application Code[Python Scripts] Libs[Pandas/Libraries] Bins[OS Binaries] end Application --> Container[Container Engine / Docker] Container --> OS[Host Operating System] OS --> Hardware[Infrastructure: Laptop / On-Prem / AWS]

Correct answer: False

This statement is False. MongoDB Compass is the official graphical user interface (GUI) specifically designed for MongoDB, which is a NoSQL document database. Tools like DBeaver, SQL Server Management Studio (SSMS), or pgAdmin are typically used for relational SQL databases like PostgreSQL or SQL Server.

Correct answer: ELT (Extract, Load, Transform)

This describes ELT (Extract, Load, Transform). In modern cloud data warehouses, it is often more efficient to Extract raw data, Load it directly into the target system, and then use the target system's robust compute capabilities to Transform the data natively. ETL performs the transformation in a separate staging server before loading. Delta loads and full loads refer to the volume of data being moved, not the architectural pattern of the transformation. flowchart LR Source[(Data Sources)] -->|Extract| Pipeline[Data Pipeline] Pipeline -->|Load Raw Data| Target[(Cloud Data Warehouse)] Target -->|Transform Natively| Target