Snowflake COF-C02 Online Practice Questions and Exam Preparation

Snowflake COF-C02 Online Questions & Answers

• Question 781:

  A virtual warehouse initially suffers from poor performance as a result of queries from multiple concurrent processes that are queuing. Over time, the problem resolved.

  What action can be taken to prevent this from happening again?

  A. Increase the size of the virtual warehouse.
  B. Add a cluster key to the most used JOIN key.
  C. Change the multi-cluster settings to add additional clusters.
  D. Enable the search optimization service for the underlying tables.
  C. Change the multi-cluster settings to add additional clusters.

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  Explanation

• Question 782:

  Which command will identify the names of files that are in a Snowflake stage?

  A. DESCRIBE FILE FORMAT
  B. SHOW FILE FORMAT
  C. LIST
  D. SELECT $1 FROM
  C. LIST

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  Explanation

• Question 783:

  What is a machine learning and data science partner within the Snowflake Partner Ecosystem?

  A. Informatica
  B. Power Bl
  C. Adobe
  D. Data Robot
  D. Data Robot

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  Explanation

  https://docs.snowflake.com/en/user-guide/ecosystem-analytics.html

• Question 784:

  Which table type is automatically deleted after a session is closed and has no Fail-safe or Time Travel cost?

  A. Temporary
  B. Transient
  C. Permanent
  D. External
  A. Temporary

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  Explanation

• Question 785:

  Using which copy option when unloading data allows users to include a Universally Unique Identi er (UUID) in the names of unloaded les?

  A. VALIDATION_MODE
  B. SINGLE
  C. HEADER
  D. INCLUDE_QUERY_ID
  D. INCLUDE_QUERY_ID

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  Explanation

• Question 786:

  A user is loading JSON documents composed of a huge array containing multiple records into Snowflake. The user enables the strip__outer_array file format option

  What does the STRIP_OUTER_ARRAY file format do?

  A. It removes the last element of the outer array.
  B. It removes the outer array structure and loads the records into separate table rows,
  C. It removes the trailing spaces in the last element of the outer array and loads the records into separate table columns
  D. It removes the NULL elements from the JSON object eliminating invalid data and enables the ability to load the records
  B. It removes the outer array structure and loads the records into separate table rows,

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  Explanation

  Data Size Limitations The VARIANT data type imposes a 16 MB size limit on individual rows. For some semi-structured data formats (e.g. JSON), data sets are frequently a simple concatenation of multiple documents. The JSON output from some software is composed of a single huge array containing multiple records. There is no need to separate the documents with line breaks or commas, though both are supported. If the data exceeds 16 MB, enable the STRIP_OUTER_ARRAY file format option for the COPY INTO

  command to remove the outer array structure and load the records into separate table rows: copy into from @~/.json file_format = (type = 'JSON' strip_outer_array = true);

  https://docs.snowflake.com/en/user-guide/semistructured-considerations.html

  Question 787:

  How long is the load history stored in the metadata of the pipe in Snowpipe?

  A. 2 days
  B. 7 days
  C. 14 days
  D. 64 days

  C. 14 days

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  Explanation

  Question 788:

  Which data type can be used to load semi-structured data files directly, without explicitly describing the hierarchical structure of the data?

  A. TEXT
  B. VARIANT
  C. VARCHAR
  D. VARBINARY

  B. VARIANT

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  Explanation

  Question 789:

  A materialized view should be created when which of the following occurs? (Choose two.)

  A. There is minimal cost associated with running the query.
  B. The query consumes many compute resources every time it runs.
  C. The base table gets updated frequently.
  D. The query is highly optimized and does not consume many compute resources.
  E. The results of the query do not change often and are used frequently.

  B. The query consumes many compute resources every time it runs.
  E. The results of the query do not change often and are used frequently.

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  Explanation

  https://docs.snowflake.com/en/user-guide/views-materialized.html#deciding-when-to-create-a-materialized-view

  Question 790:

  Which command should be used to implement a masking policy that was already created in Snowflake?

  A. ALTER MASKING POLICY
  B. APPLY MASKING POLICY
  C. CREATE MASKING POLICY
  D. SET MASKING POLICY

  D. SET MASKING POLICY

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  Explanation

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