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NEW QUESTION 24
Suppose there are three events then which formula must always be equal to P(E1|E2,E3)?

  • A. P(E1,E2;E3)/P(E2,E3)
  • B. P(E1,E2,E3)P(E2)P(E3)
  • C. P(E1,E2|E3)P(E2|E3)P(E3)
  • D. P(E1,E2,E3)P(E1)/P(E2:E3)
  • E. P(E1,E2|E3)P(E3)

Answer: A

Explanation:
Explanation
This is an application of conditional probability: P(E1,E2)=P(E1|E2)P(E2). so
P(E1|E2) = P(E1.E2)/P(E2)
P(E1,E2,E3)/P(E2,E3)
If the events are A and B respectively, this is said to be "the probability of A given B"
It is commonly denoted by P(A|B):or sometimes PB(A). In case that both "A" and "B" are categorical
variables, conditional probability table is typically used to represent the conditional probability.

 

NEW QUESTION 25
A new data engineer new.engineer@company.com has been assigned to an ELT project. The new data
engineer will need full privileges on the table sales to fully manage the project.
Which of the following commands can be used to grant full permissions on the table to the new data engineer?

Answer: E

 

NEW QUESTION 26
Which of the following describes how Databricks Repos can help facilitate CI/CD workflows on the
Databricks Lakehouse Platform?

  • A. Databricks Repos can facilitate the pull request, review, and approval process before merging branches
  • B. Databricks Repos can be used to design, develop, and trigger Git automation pipelines
  • C. Databricks Repos can store the single-source-of-truth Git repository
  • D. Databricks Repos can commit or push code changes to trigger a CI/CD process
  • E. Databricks Repos can merge changes from a secondary Git branch into a main Git branch

Answer: D

 

NEW QUESTION 27
A data engineer has configured a Structured Streaming job to read from a table, manipulate the data, and then
perform a streaming write into a new table. The code block used by the data engineer is below:
1. (spark.table("sales")
2. .withColumn("avg_price", col("sales") / col("units"))
3. .writeStream
4. .option("checkpointLocation", checkpointPath)
5. .outputMode("complete")
6. ._____
7. .table("new_sales")
8.)
If the data engineer only wants the query to execute a single micro-batch to process all of the available data,
which of the following lines of code should the data engineer use to fill in the blank?

  • A. .trigger(continuous="once")
  • B. .trigger(once=True)
  • C. .processingTime("once")
  • D. .processingTime(1)
  • E. .trigger(processingTime="once")

Answer: B

 

NEW QUESTION 28
A data engineering team needs to query a Delta table to extract rows that all meet the same condi-tion.
However, the team has noticed that the query is running slowly. The team has already tuned the size of the
data files. Upon investigating, the team has concluded that the rows meeting the condition are sparsely located
throughout each of the data files.
Based on the scenario, which of the following optimization techniques could speed up the query?

  • A. Bin-packing
  • B. Write as a Parquet file
  • C. Tuning the file size
  • D. Z-Ordering
  • E. Data skipping

Answer: D

 

NEW QUESTION 29
......

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