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Snowflake DEA-C02 Exam Questions

Snowflake DEA-C02 Exam Questions Answers

SnowPro Advanced: Data Engineer Certification Exam

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  Updated September 21,2026
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Snowflake DEA-C02 Practice Test Questions ( Updated) – Real Exam Questions & Dumps PDF

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Snowflake DEA-C02 Sample Questions – Free Practice Test & Real Exam Prep

Question #1

Which Snowflake feature automatically loads files as they arrive in cloud storage?  

  • A. Snowpipe
  • B. Result Cache 
  • C. Query Profile
  • D. Secure View 
Answer: A
Explanation
Snowpipe supports serverless continuous ingestion. Advantages: Near real-time loading Event-driven architecture Automatic scaling Reduced operational overhead It commonly integrates with cloud event notifications. 
Question #2

A company needs rapid provisioning of testing environments using production datasets without immediate storage duplication. Which Snowflake feature is BEST?

  • A. Zero-Copy Cloning
  • B. Replication   
  • C. Snowpipe
  • D. Resource Monitor
Answer: A
Explanation
Zero-Copy Cloning creates logical copies using metadata references. Advantages: Instant cloning Minimal initial storage usage Safe testing environments Simplified development workflows Storage increases only after cloned data diverges. 
Question #3

Which Snowflake layer is responsible for authentication, metadata management, and query optimization? 

  • A. Cloud Services Layer 
  • B. Compute Layer   
  • C. Database Storage Layer
  • D. Virtual Warehouse Layer
Answer: A
Explanation
The Cloud Services Layer manages: Authentication Metadata Query optimization RBAC Infrastructure orchestration It acts as the central coordination layer for Snowflake.
Question #4

Which Snowflake feature improves performance for repeated analytical queries by storing precomputed results? 

  • A. Materialized View
  • B. Stream 
  • C. Reader Account  
  • D. Row Access Policy
Answer: A
Explanation
Materialized Views store computed query outputs. Best suited for: BI dashboards Reporting systems Aggregation-heavy analytics Repeated workloads Snowflake automatically refreshes them as data changes. 
Question #5

Which Snowflake object references files stored externally in cloud object storage?  

  • A. External Table
  • B. Temporary Table  
  • C. Stream
  • D. Task 
Answer: A
Explanation
External Tables provide metadata references to files stored externally. Supported platforms include: Amazon S3 Azure Blob Storage Google Cloud Storage They support modern data lake architectures.
Question #6

A Snowflake administrator wants to automatically suspend warehouses after inactivity to control costs. Which feature should be configured?

  • A. Auto-suspend  
  • B. Dynamic Table 
  • C. Materialized View 
  • D. Fail-safe
Answer: A
Explanation
Auto-suspend minimizes unnecessary warehouse runtime. Benefits: Reduced compute costs Improved cost governance Automated warehouse lifecycle management This is one of the most common warehouse optimization settings. 
Question #7

Which Snowflake feature allows recovery of historical table states using point-in-time queries?  

  • A. Time Travel
  • B. Query Profile
  • C. Search Optimization Service
  • D. Snowpipe
Answer: A
Explanation
Time Travel supports: Historical querying Recovery of deleted data Recovery of dropped objects Auditing workflows Queries can use the AT or BEFORE clauses.
Question #8

A company wants to create near real-time CDC pipelines with automated processing. Which Snowflake architecture is MOST appropriate?

  • A. Streams and Tasks  
  • B. Materialized Views and Fail-safe  
  • C. Reader Accounts and Clustering
  • D. Secure Views and Resource Monitors
Answer: A
Explanation
Streams capture incremental data changes, while Tasks automate SQL execution. Together they support: Incremental ETL CDC pipelines Event-driven transformations Automated orchestration This is a common DEA-C02 architecture pattern.
Question #9

Which Snowflake feature allows secure masking of sensitive data dynamically during query execution?

  • A. Dynamic Data Masking
  • B. Auto-suspend
  • C. Search Optimization Service
  • D. Snowpipe
Answer: A
Explanation
Dynamic masking policies apply role-based masking rules at query time. Common use cases: PII protection Financial data masking Regulatory compliance Controlled data exposure Different users may see different representations of the same data
Question #10

A Snowflake engineer needs to optimize a table frequently queried using date-range filters. Which feature would MOST improve query performance?

  • A. Clustering Key   
  • B. Resource Monitor   
  • C. Reader Account 
  • D. Secure View
Answer: A
Explanation
Clustering Keys improve partition pruning by organizing related rows together. Benefits for date-range queries: Reduced micro-partition scanning Faster filtering performance Lower query execution times This is especially useful for very large fact tables. 
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