Snowflake SnowPro Advanced: Data Analyst Certification : DAA-C01認證
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最新的 SnowPro Advanced DAA-C01 免費考試真題:
1. A large, complicated query is used to generate a data set for a report on the most recent month. It is taking longer than expected. A review of the Query Profile shows excessive spilling. How can the performance of the query be improved WITHOUT increasing costs?
A) Change the source tables into external tables to establish and take advantage of custom partitioning.
B) Split the query into multiple steps, replacing Common Table Expressions (CTEs) with temporary tables to process the data in smaller batches.
C) Run the query against zero-copy clones of the source tables to avoid contention with other queries.
D) Create a materialized view clustered on a date column, on the table that is causing the spilling.
2. What option would allow a Data Analyst to efficiently estimate cardinality on a data set that contains trillions of rows?
A) Count(Distinct *)
B) SYSTEM$ESTIMATE
C) Count(Distinct *)/Count(*)
D) HLL(*)
3. A Data Analyst creates a dashboard showing the total credit consumption for each virtual warehouse as follows:
Why is the query failing?
A) The current database context must be changed to SNOWFLAKE.
B) The query must be executed by a user with the ACCOUNTADMIN role.
C) DB1 must be authorized to have SELECT access to ACCOUNT_USAGE.
D) INFORMATION_SCHEMA should be used instead of ACCOUNT_USAGE.
4. What potential problem can be identified in the Query profile below?
A) There Is inefficient pruning.
B) There is query spilling.
C) The query is not using a foreign Key.
D) There is an exploding join
5. There are two similarly-structured and sized tables, Table_a and Table_b, in a schema with data populated in both tables. A Data Analyst is running queries as part of a preliminary analysis of the data to check the MAX value of a numeric column named num which is present in both the tables:
* Query 1: SELECT MAX(num) FROM Table_a;
* Query 2: SELECT MAX(num) FROM Table_b;
After running the queries, the Analyst observed that Query 2 ran significantly slower than Query 1. Why is this occurring?
A) Table_b has a row-access policy defined.
B) The USE_CACHED_RESULT was set to FALSE before running Query 2.
C) A multi-cluster warehouse was used to run Query 1.
D) Table_b has more rows than Table_a.
問題與答案:
| 問題 #1 答案: B | 問題 #2 答案: D | 問題 #3 答案: A | 問題 #4 答案: D | 問題 #5 答案: A |
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簡單的說,你們的題庫幫我通過了DAA-C01認證考試,這是一個很適合想到得Snowflake認證的考生使用,感謝你們網站提供的幫助!