OneLake Unified Storage & Fabric Data Engineer

1. What is a shortcut in OneLake?

A reference to data in external storage without copying it

A keyboard command for quick navigation

A compressed file format

A temporary data cache

2. Which Fabric item types can directly access and query OneLake data?

Lakehouses, Warehouses, Notebooks, and Semantic Models

Only Lakehouses

Only Power BI reports

External tools exclusively

3. What is the significance of OneLake's single copy of data principle?

Reduces storage costs and data redundancy while enabling shared access

Limits data availability

Requires multiple copies for security

Prevents concurrent access

4. How does OneLake support multi-workspace collaboration?

Shortcuts enable cross-workspace data sharing without duplication

Data must be copied between workspaces

Workspaces cannot share data

Only read-only access is permitted

5. What is the 'Files' folder in a Lakehouse used for?

Storing unstructured data like images, documents, and logs

Storing only structured tables

System configuration files

Temporary query cache

6. How do Fabric data engineers typically load data into OneLake?

Using Fabric pipelines, notebooks, or dataflows

Manual file uploads only

Direct API calls exclusively

Scheduled batch imports from email

7. What format are Lakehouse tables stored in by default?

Delta format

Parquet only

CSV

JSON

8. In Fabric, what does a Semantic Model (formerly Power BI dataset) connect to?

Lakehouse tables in OneLake

Only CSV files

External databases exclusively

Real-time streams only

9. What is the relationship between OneLake and Azure Data Lake Storage Gen2?

OneLake abstracts storage while maintaining ADLS Gen2 compatibility

They are completely separate systems

OneLake replaces ADLS Gen2 entirely

ADLS Gen2 is a deprecated service

10. How does OneLake handle data governance and compliance?

Provides metadata tracking, audit logs, and lineage information

Does not support any governance features

Requires manual governance implementation only

Uses third-party governance tools exclusively

11. What is the primary purpose of OneLake in Microsoft Fabric?

Centralize data storage across all Fabric workspaces

Replace Azure Data Lake Storage exclusively

Provide only relational database functionality

Manage user authentication and permissions

12. Which access control model does OneLake use?

Role-based access control (RBAC) integrated with Microsoft Entra ID

IP-based allowlisting only

Anonymous public access

API key authentication exclusively

13. What is the purpose of the 'Tables' folder in a Lakehouse?

Store Delta tables and structured data

Store only raw image files

Archive deleted files

Cache query results

14. How does OneLake integrate with Fabric workspaces?

Each workspace has its own OneLake folder structure

Workspaces cannot access OneLake directly

OneLake is external to all workspaces

Only one workspace can use OneLake

15. What role does Delta Lake play in OneLake storage?

Provides ACID transactions and schema enforcement

Acts as a temporary caching layer only

Manages user authentication

Controls network bandwidth

16. Which of the following is a key benefit of OneLake's unified approach?

Eliminates data silos by centralizing storage

Requires separate storage accounts for each department

Increases data redundancy across regions

Limits scalability for large datasets

17. In OneLake, how are files organized within a Lakehouse?

Tables folder for structured data and Files folder for unstructured data

All files in a single flat directory

Alphabetically by file extension

By creation date only

18. What is a Lakehouse in Fabric?

A unified storage container combining lake and warehouse capabilities

A purely relational database system

An external cloud storage service

A visualization-only workspace

19. Which storage format does OneLake primarily use for structured data?

Parquet and Delta

CSV and JSON only

XML and YAML

Binary flat files

20. OneLake uses a hierarchical storage structure. What is the top-level organizational unit?

Workspace

Tenant

Lakehouse

Capacity

Fabric Data Engineer OneLake Unified Storage Concepts Quiz