Snowflake DEA-C02 : SnowPro Advanced: Data Engineer (DEA-C02)

DEA-C02 pass collection

Exam Code: DEA-C02

Exam Name: SnowPro Advanced: Data Engineer (DEA-C02)

Updated: Oct 12, 2026

Q & A: 354 Questions and Answers

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Snowflake DEA-C02 Exam Syllabus Topics:

SectionWeightObjectives
Data Ingestion and Consumption20%- Data Unloading
  • 1. Unloading to internal and external stages
  • 2. Partitioning unloading data
  • 3. Data export best practices
- Bulk Loading and Unloading
  • 1. Handling staged files
  • 2. File format options (CSV, JSON, Parquet, AVRO)
  • 3. COPY INTO command options and best practices
  • 4. Data loading performance optimization
- Continuous Data Loading
  • 1. Snowpipe configuration and usage
  • 2. Automating data loading with tasks
  • 3. Real-time data ingestion patterns
Security and Governance15%- Governance and Compliance
  • 1. Data retention policies
  • 2. Access history and auditing
  • 3. Object tagging
  • 4. Row access policies
- Access Control
  • 1. GRANT and REVOKE operations
  • 2. Role-based access control (RBAC)
  • 3. Role hierarchy and ownership
- Data Security
  • 1. Data masking and tokenization
  • 2. Column-level security
  • 3. External tokenization
  • 4. Row-level security policies
Performance Optimization15%- Query Optimization
  • 1. Query result caching
  • 2. Query profiling and analysis
  • 3. Indexing strategies with clustering
  • 4. Avoiding common performance pitfalls
- Data Optimization
  • 1. Data cache management
  • 2. Materialized views
  • 3. Search optimization service
- Warehouse Performance
  • 1. Warehouse sizing and selection
  • 2. Resource monitors
  • 3. Multi-cluster warehouses
  • 4. Warehouse scaling policies
Data Architecture and Processing20%- Data Storage Architecture
  • 1. Hybrid Tables concepts
  • 2. Table types (Permanent, Transient, Temporary)
  • 3. Micro-partitioning and clustering
- Data Pipeline Design
  • 1. Data scheduling and orchestration
  • 2. Stream and task patterns
  • 3. Pipeline monitoring and error handling
- Data Modeling for Performance
  • 1. Dimension handling
  • 2. Star and snowflake schemas
  • 3. Slowly changing dimensions (SCD)
Data Transformation with Snowflake30%- Data Processing Patterns
  • 1. Zero-copy cloning for ETL
  • 2. Time travel and change data capture
  • 3. MERGE, UPDATE, DELETE operations
- SQL Transformations
  • 1. Data type conversions and handling
  • 2. Complex JOINs and set operations
  • 3. Working with semi-structured data (VARIANT)
  • 4. Window functions advanced usage
- Snowflake Scripting
  • 1. Error handling
  • 2. Procedures and control flow
  • 3. Dynamic SQL

Snowflake SnowPro Advanced: Data Engineer (DEA-C02) Sample Questions:

Question #1

You are designing a data ingestion process that involves loading data from an external stage. The data is partitioned into multiple files based on date. The stage is configured to point to the root directory of the partitioned dat a. You want to efficiently load only the data for a specific date (e.g., '2023-01-15') using the 'COPY' command. Assume your stage name is 'my _ stage' , your table is 'my_table', your date column is named 'event_date', and the files in the stage are named in the format 'data YYYY-MM-DD.csv'. Which of the following options allows you to selectively load the data for the specific date? (Select ALL that apply)

  • A. Option C
  • B. Option B
  • C. Option D
  • D. Option E
  • E. Option A
Reveal Solution  Discussion  0

Correct Answer: B,D,E  🗳️

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Question #2

You are tasked with sharing a subset of a customer table (CUSTOMER DATA') residing in your organization's Snowflake account with a partner organization. You need to mask personally identifiable information (PII) while providing near real-time updates. You decide to use a secure view. Which of the following SQL statements is the MOST efficient and secure way to accomplish this, assuming the partner only needs 'customer id', 'masked_email', 'city', and 'state'? The email should be masked using SHA256.

  • A. Option C
  • B. Option B
  • C. Option D
  • D. Option E
  • E. Option A
Reveal Solution  Discussion  0

Correct Answer: E  🗳️

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Question #3

A data provider wants to share a large dataset (several TB) with multiple consumers. The dataset is updated daily. The provider wants to minimize the cost associated with data sharing and ensure that consumers receive consistent data'. Which of the following strategies would be the MOST cost-effective and maintainable?

  • A. Create a data share and grant access to all consumers directly on the base tables.
  • B. Create a data share with views that point to the base tables. Use time travel to allow consumers to query data from a specific point in time before the daily update.
  • C. Create a data share with views that point to the base tables, and clone the base tables daily into a separate 'staging' database before sharing.
  • D. Create a data share and create a separate database for each consumer, cloning the data into each consumer's database daily.
  • E. Create a data share containing external tables pointing to data stored in cloud storage (e.g., AWS S3), updated daily using a pipeline.
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

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Question #4

You are tasked with designing a data pipeline that ingests JSON data from an external stage (AWS S3). The JSON files contain records for various product types, each having a different set of attributes. Some product types might have attributes that are not present in other types. You want to create a single Snowflake table that can accommodate all product types without defining a rigid schema upfront and also be queryable efficiently. Which of the following approaches, combining external tables, schema evolution and querying, would be MOST effective? (Choose two)

  • A. Create a single external table with a VARIANT column to store the entire JSON record for each product. Use LATERAL FLATTEN to extract specific attributes during querying.
  • B. Create a single external table with a VARIANT column and use the 'VALIDATE function to identify and handle schema inconsistencies during data loading.
  • C. Create a separate external table for each product type, defining the schema for each table based on the attributes present in the corresponding JSON files.
  • D. Create a stored procedure that dynamically infers the schema from the JSON files and creates a new Snowflake table based on the inferred schema.
  • E. Load all the data into a raw Snowflake internal table. Use dynamic SQL to infer distinct product types and create views on top of the raw table for each product type.
Reveal Solution  Discussion  0

Correct Answer: A,B  🗳️

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Question #5

You are developing a Snowpark Python stored procedure that performs complex data transformations on a large dataset stored in a Snowflake table named 'RAW SALES'. The procedure needs to efficiently handle data skew and leverage Snowflake's distributed processing capabilities. You have the following code snippet:

Which of the following strategies would be MOST effective to optimize the performance of this Snowpark stored procedure, specifically addressing potential data skew in the 'product id' column, assuming 'product_id' is known to cause uneven data distribution across Snowflake's micro-partitions?

  • A. Utilize Snowflake's automatic clustering on the 'TRANSFORMED_SALES table by specifying 'CLUSTER BY when creating or altering the table to ensure future data is efficiently accessed.
  • B. Implement a custom partitioning strategy using before the transformation logic to redistribute data evenly across the cluster.
  • C. Increase the warehouse size significantly to compensate for the data skew and improve overall processing speed without modifying the partitioning strategy.
  • D. Use the 'pandas' API within the Snowpark stored procedure to perform the transformation, as 'pandas' automatically optimizes for data skew.
  • E. Combine salting with repartitioning by adding a random number to the 'product_id' before repartitioning, then removing the salt after the transformation to break up the skew. Then, enable automatic clustering on the 'TRANSFORMED SALES' table.
Reveal Solution  Discussion  0

Correct Answer: E  🗳️

Explanation: Only visible for PassCollection members. You can sign-up / login (it's free).

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